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CN110315815A - Porous ceramic plate, preparation method and its application - Google Patents

Porous ceramic plate, preparation method and its application Download PDF

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Publication number
CN110315815A
CN110315815A CN201910221154.6A CN201910221154A CN110315815A CN 110315815 A CN110315815 A CN 110315815A CN 201910221154 A CN201910221154 A CN 201910221154A CN 110315815 A CN110315815 A CN 110315815A
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China
Prior art keywords
ceramic
layer
raw material
porous
ceramic plate
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CN201910221154.6A
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CN110315815B (en
Inventor
何嘉哲
黄彦儒
黄昭竣
陈泰甲
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Kinik Co
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Kinik Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00Layered products essentially comprising ceramics, e.g. refractory products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632Organic additives
    • C04B35/636Polysaccharides or derivatives thereof
    • C04B35/6365Cellulose or derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/06Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
    • C04B38/063Preparing or treating the raw materials individually or as batches
    • C04B38/0635Compounding ingredients
    • C04B38/0645Burnable, meltable, sublimable materials
    • C04B38/067Macromolecular compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00Electrical equipment
    • B32B2457/14Semiconductor wafers
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3241Chromium oxides, chromates, or oxide-forming salts thereof
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3262Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74Physical characteristics
    • C04B2235/77Density
    • C04B2235/775Products showing a density-gradient

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The present invention provides porous ceramic plate, preparation method and its application.The preparation method is the following steps are included: step (a): complete plural number ceramic raw material, these ceramic raw materials respectively include surface layer ceramic raw material and bottom ceramic raw material, and the average grain diameter for the metal oxide that wherein the surface layer ceramic raw material is included is less than or equal to 20 microns;Step (b): after respectively step is formed in these ceramic raw materials, the plural raw embryo shaped by these ceramic raw materials is respectively obtained;Step (c): these raw embryos being folded and set to form a lamination, which includes the raw embryo of surface layer ceramic raw material forming and the raw embryo of bottom ceramic raw material forming;Step is formed in the lamination, the lamination after obtaining a forming;And, step (d): the lamination after being sintered the forming, to obtain a porous ceramic plate, wherein, the porous ceramic plate includes the mutually folded surface layer ceramic layer and bottom ceramic layer set, and the average pore size of the surface layer ceramic layer is less than the average pore size of the bottom ceramic layer.

Description

Porous ceramic plate, preparation method and its application
Technical field
The present invention relates to a kind of porous ceramic plate, it is particularly applied to the vacuum chuck or non-contact of fixed wafer or work package The application of the porous ceramic plate of formula application apparatus, the preparation method of the porous ceramic plate and the porous ceramic plate.
Background technique
In the field of manufacture semiconductor, in order to make wafer in the automation transfer of the working processes such as cleaning, cutting, grinding Maintenance is firm in the process, reduces wafer damages and promotes producing line fluency, is at present most-often used with vacuum chuck absorption wafer Carrying adsorption tool, and how to make sucker sorption face have high flatness, and then promoted wafer manufacturing method yield at For considerable subject under discussion.About the preparation method of vacuum chuck, Japanese Patent announces No. 2779968 patent of invention and discloses one The preparation method of kind vacuum chuck, elder generation forms green compact with ceramic raw material and organic binder etc. and is fired into chuck main body, then grinds Grinding the chuck main body surface makes its smoothing, then forms one on chuck main body surface with plasma-based chemical vapour deposition technique and does not have The ceramic membrane of stomata;Though the high vacuum chuck of the available sorption face flatness of the preparation method, however the system of the preparation method Standby program is cumbersome and high production cost, is unfavorable for business application.
In addition, Japanese Unexamined Patent Publication 2002-373873 invention patent application case discloses a kind of preparation of ceramic base material lamination Method, shape needed for being initially formed each ceramic base material in a manner of being machined as compositions such as ceramic raw materials are then respectively fired At ceramic base material, after then carrying out surface treatment and slot treatment to these ceramic base materials, then these are bonded with inorganic bond Ceramic base material is to obtain the ceramic base material lamination;However the preparation procedure of the preparation method is cumbersome, energy consumption, and if adhesive failure It then will lead to the removing between ceramic base material.
Furthermore No. 101149350 patent of invention of Korean Patent Laid discloses a kind of with the porous of different pore size size The preparation method of ceramic double-layer, elder generation carries out support layer compression moulding after being mixed by ceramic material powder and organic bond walk Suddenly, then the support layer compared with gross porosity diameter is provided in heat-agglomerating;A wherein surface for the support layer made of sintering is coated with mixing There is the slurry of another ceramic material powder and organic bond, then carrying out heat-agglomerating forms the slurry with smaller aperture due Adsorption layer, with obtain have different pore size size double-layer porous ceramic layer;However the preparation procedure of the preparation method it is cumbersome, Energy consumption, and because being coated with adsorption layer slurry on the support layer sintered, therefore adsorption layer slurry can insert the support layer sintered Hole in, leading to adsorption layer and support layer, there are vapour lock differences, thus the double-layer porous ceramic layer be applied to it is flat comprising air bearing It is gas barrier to be still unable to meet demand when the contactless transportation systems such as platform, air bearing sliding rail and air-bearing.
Summary of the invention
In view of the technological deficiency of above-mentioned preparation method, the purpose of the present invention is to provide a kind of preparation sides of porous ceramic plate Method, preparation procedure is simple, can promote productivity effect.
Another object of the present invention is to provide a kind of preparation methods of porous ceramic plate, can be energy saving, reduce production Cost.
To achieve the aforementioned purpose, the present invention provides a kind of preparation method of porous ceramic plate, and it includes following steps: step (a): complete plural number ceramic raw material, these ceramic raw materials respectively include surface layer ceramic raw material and bottom ceramic raw material, wherein the table The average grain diameter for the metal oxide that layer ceramic raw material is included is less than or equal to 20 microns;Step (b): by these ceramic raw materials After step respectively is formed, the plural raw embryo shaped by these ceramic raw materials is respectively obtained;Step (c): these raw embryos are folded If forming a lamination, which includes the raw embryo of surface layer ceramic raw material forming and the raw embryo of bottom ceramic raw material forming; Step is formed in the lamination, the lamination after obtaining a forming;And step (d): the lamination after being sintered the forming, to obtain Obtain a porous ceramic plate, wherein the porous ceramic plate includes the mutually folded surface layer ceramic layer and bottom ceramic layer set, surface layer ceramics The average pore size of layer is less than the average pore size of the bottom ceramic layer.
The present invention overlaps again after first the surface layer ceramic raw material and the bottom ceramic raw material are respectively formed, then just into The once sintered step of row.Thus in addition to can simplify preparation procedure and it is energy saving other than, it is obtained more by the preparation method Hole ceramic plate does not need additionally to bond using added binding agents between each layer, avoids adhesive failure and makes the porous ceramic plate include The situation being detached between each layer;In addition, the porous ceramic plate that the preparation method obtains has the characteristic of whole even pore distribution, And then the porous ceramic plate is made to have the advantages that uniform breathability is good.By limiting metal oxide contained by the ceramic raw material of surface layer Average particle size range so that the surface layer ceramic layer of the porous ceramic plate has tiny average pore size, even if for adsorbing fixation When very thin work package (such as wafer), it so that work package is kept flat and indeformable to work package accurately measuring or be added with benefit Work;Also, the porous ceramic plate is subsequent when being connected with vacuum or to gas system, has by the bottom ceramic layer with system attachment Biggish average pore size and allow vapour lock to reduce, and then can be reduced consume energy and make the porous ceramic plate and meanwhile reach have rigidly and can be saturating The effect of gas.If be applied to contactless transportation system, uniform and stable air cushion layer can be provided, keeps the flat of object surface Smooth degree can apply to the object for carrying high-precision or large area.
Preferably, the average grain diameter for the metal oxide that surface layer ceramic raw material is included used in step (a) be less than or Equal to 10 microns;It is furthermore preferred that the average grain diameter for the metal oxide that surface layer ceramic raw material is included used in step (a) is situated between In 0.01 micron between 8 micron ranges.
In a wherein embodiment, plural ceramic raw material is represented by two kinds of ceramic raw materials, in this scheme, plural number pottery Porcelain raw material is surface layer ceramic raw material and bottom ceramic raw material;In another embodiment, plural ceramic raw material is also denoted as three Kind ceramic raw material, in this scheme, plural ceramic raw material is surface layer ceramic raw material, the first middle layer ceramic raw material and bottom ceramics Raw material;In yet another embodiment, plural ceramic raw material is also denoted as four kinds of ceramic raw materials, in this scheme, plural number ceramics Raw material is surface layer ceramic raw material, the first middle layer ceramic raw material, the second middle layer ceramic raw material and bottom ceramic raw material.The present invention Ceramic raw material applicatory is illustrated in this, but is not limited to above-mentioned three kinds of embodiments.
Therefore, when these ceramic raw materials are more than two kinds of ceramic raw materials, which further includes being made pottery by the middle layer Porcelain raw material is formed by an at least middle layer ceramic layer, and the average pore size of the surface layer ceramic layer is less than the flat of the middle layer ceramic layer Equal aperture, and the average pore size of the middle layer ceramic layer is less than the average pore size of the bottom ceramic layer.For example, when these potteries When porcelain raw material is three kinds of ceramic raw materials, which can form the first middle layer ceramic layer, surface layer ceramics The average pore size of layer is less than the average pore size of the first middle layer ceramic layer, and the average pore size of the first middle layer ceramic layer is small In the average pore size of the bottom ceramic layer;When these ceramic raw materials are four kinds of ceramic raw materials, the first middle layer ceramic material The first middle layer ceramic layer and the second middle layer ceramic layer, surface layer ceramics can be formed with the second middle layer ceramic material The average pore size of layer is less than the average pore size of the first middle layer ceramic layer, and the average pore size of the first middle layer ceramic layer is less than The average pore size of second middle layer, the average pore size of the second middle layer ceramic layer are less than the average hole of the bottom ceramic layer Diameter.The average pore size of middle layer ceramic layer is finally formed by between the surface layer ceramic layer by the middle layer ceramic raw material Between the average pore size of the bottom ceramic layer, the ventilation from the bottom ceramic layer to surface layer ceramic layer can be more smooth.
In order to keep the average pore size of each layer ceramic layer in the porous ceramic plate different, it is preferred that these ceramics in step (a) The average grain diameter for the metal oxide that raw material respectively contains is different;For example, when these ceramic raw materials are two kinds of ceramic raw materials When, the average grain diameter of metal oxide contained by the surface layer ceramic raw material is less than metal oxide contained by the bottom ceramic raw material Average grain diameter;When these ceramic raw materials are three kinds of ceramic raw materials, the surface layer ceramic raw material, the first middle layer ceramic raw material With the average grain diameter of the respective contained metal oxide of the bottom ceramic raw material, from being as low as greatly sequentially the surface layer ceramic raw material institute Metal contained by metal oxide to the bottom ceramic raw material contained by the metal oxide that contains, the first middle layer ceramic raw material Oxide;When these ceramic raw materials are four kinds of ceramic raw materials, which the first middle layer ceramic raw material, is somebody's turn to do The average grain diameter of the respective contained metal oxide of second middle layer ceramic raw material and the bottom ceramic raw material, from as low as greatly sequentially For metal oxide contained by metal oxide contained by the surface layer ceramic raw material, the first middle layer ceramic raw material, this second Metal oxide contained by metal oxide contained by middle layer ceramic raw material to the bottom ceramic raw material.Then in step (c) In, these raw embryos are folded according to the average particle diameter size sequence of metal oxide contained by the ceramic raw material respectively contained and set to form this Lamination.
In certain embodiments, these ceramic raw materials in the step (a) can further include being easy to be burnt to lose or decompose And the pore-creating filler of hole is generated, and such as: calcium carbonate (CaCO3), magnesium carbonate (MgCO3), polymethyl methacrylate (Poly (methyl methacrylate), PMMA) or polystyrene (Polystyrene, PS) etc., but not limited to this.For example, Only the bottom ceramic raw material adds the middle layer ceramic raw material in aforementioned pore-creating filler or step (a) and should in step (a) Bottom raw material all adds aforementioned pore-creating filler, to increase average pore size and the hole of bottom ceramic layer and/or middle layer ceramic layer Gap rate.
In certain embodiments, the plural ceramic raw material in the step (a) can all include thickener, such as: starch (Starch), methylcellulose (Methyl Cellulose) etc., but not limited to this.Increased by being added in these ceramic raw materials Thick dose, each ingredient in ceramic raw material can be made to be uniformly mixed, therefore the hole uniformity of the porous ceramic plate can be promoted;In addition, Thickener is usually that can be burnt the material lost, can also promote the porosity and aeration of the ceramic plate.
According to the present invention, the forming step in step (b) and step (c), which can be used, is injection moulded, is press-formed, being extruded into Type or calendering formation, but not limited to this.Preferably, the surface layer ceramic raw material and the bottom ceramic raw material respectively make in step (b) Step is formed with rolling-molding method;Preferably, also step is formed using rolling-molding method in the lamination in step (c). These ceramic raw materials or lamination are rolled over using horizontal roller roller, not only program is simple, and does not need repeatedly to thicken and can reach each layer Thickness needed for body.
Preferably, rolling-molding method used in step (b), calendering force is every square centimeter and is greater than 10 milligrams, rolls Temperature rolls ambient humidity between relative humidity 0 to 100 between 0 DEG C to 100 DEG C.
Preferably, rolling-molding method used in step (c), calendering force is every square centimeter and is greater than 1000 milligrams, presses Prolong temperature between 15 DEG C to 40 DEG C, rolls ambient humidity between relative humidity 40 to 100.
In certain embodiments, metal oxide contained by the plural ceramic raw material in the step (a) includes iron (Fe), the oxide of the metals such as manganese (Mn), chromium (Cr), cobalt (Co), magnesium (Mg), calcium (Ca), copper (Cu), aluminium (Al), but be not limited to This.For example, ferriferous oxide includes ferrous oxide (FeO), di-iron trioxide (Fe2O3) etc., but not limited to this;Mn oxide Including manganese monoxide (MnO), mangano-manganic oxide (Mn3O4), manganese sesquioxide managnic oxide (Mn2O3), manganese dioxide (MnO2) etc., but be not limited to This;Chromated oxide includes chromous oxide (CrO), chrome green (Cr2O3), chromium trioxide (CrO3) etc., but not limited to this;Cobalt Oxide includes cobalt black (CoO), cobalt sesquioxide (Co2O3), cobaltosic oxide (Co3O4) etc., but not limited to this;Copper oxygen Compound includes cuprous oxide (Cu2O), copper oxide (CuO) etc., but not limited to this.According to metal oxide contained by ceramic raw material Property, can adjust the properties such as conductivity or the mechanical strength of porous ceramic plate entirety.For example, it in order to adjust conductivity, makes pottery Porcelain raw material may include the metal oxides such as ferriferous oxide, Cu oxide, Mn oxide, but not limited to this;Preferably, these ceramics Ferriferous oxide content contained by raw material accounts for the 20 weight % or more of these ceramic raw material gross weights;It is furthermore preferred that these ceramic raw materials Contained ferriferous oxide content accounts for the 30 weight % to 80 weight % of these ceramic raw material gross weights.Preferably, these ceramic raw materials Contained copper oxide content accounts for the 0.01 weight % or more of these ceramic raw material gross weights;It is furthermore preferred that these ceramic raw material institutes The copper oxide content contained accounts for the 0.01 weight % to 50 weight % of these ceramic raw material gross weights.In order to adjust mechanical strength, make pottery Porcelain raw material may include the metal oxides such as Mn oxide, cobalt/cobalt oxide, magnesium oxide, but not limited to this;Preferably, these ceramics Mn oxide content contained by raw material accounts for the 0.01 weight % or more of these ceramic raw material gross weights;It is furthermore preferred that these ceramics are former The contained Mn oxide content of material accounts for the 0.01 weight % to 80 weight % of these ceramic raw material gross weights.Preferably, these ceramics Cobalt/cobalt oxide content containing cobalt/cobalt oxide contained by raw material accounts for the 0.01 weight % or more of these ceramic raw material gross weights;It is furthermore preferred that Cobalt/cobalt oxide content contained by these ceramic raw materials accounts for the 0.01 weight % to 50 weight % of these ceramic raw material gross weights.
In certain embodiments, the plural ceramic raw material in the step (a) can not include silicon carbide or other are high hard Spend particle (such as monocrystalline brill), to avoid the porous ceramic plate eventually formed excessive high hardness and be easy to scratch wafer or work package.
In the case where not influencing the effect of production method of porous ceramic plate of the invention, can also regard different use is needed It asks, will add other auxiliary additives in these ceramic raw materials, such as is binder, thermal expansion controlling agent, conductivity control agent, quiet Electric preventing agent, mechanical strength controlling agent or coefficient of friction regulator etc., but not limited to this.
Sintering is that these raw embryos are reacted under high temperature environment, and the bonding agent in ceramic raw material is heated to its glass and is turned Change and forms homogeneous solid on temperature to combine ceramic raw material;Therefore, bonding agent type is different, also influences the choosing of sintering temperature It selects.And the environment temperature of sintering process will affect pore size, gas cell distribution, planform and material group in porous ceramic plate At, and then influence the performance of porous ceramic plate.When sintering temperature is excessively high, thermal stress caused by ceramic plate is too big, is likely to result in burning Ceramic plate warpage, ceramic plate after knot, which crack, even to be ruptured.Preferably, the sintering temperature in the step (d) is 500 DEG C to 1250 DEG C, it is furthermore preferred that the sintering temperature in the step (d) is 520 DEG C to 950 DEG C.The sintering temperature of above range can lower the energy Consumption, while the yield of resulting porous ceramic plate after sintering can be made more to be promoted.
In addition, the present invention separately provides porous ceramic plate obtained by prepared by a kind of preparation method such as previous porous ceramic plate.
Another object of the present invention is to provide a kind of porous ceramic plate, which includes the mutually folded surface layer ceramics set Layer and bottom ceramic layer, the average pore size of the surface layer ceramic layer are less than the average pore size of the bottom ceramic layer.The porous ceramic plate Characteristic with whole even pore distribution, and then the porous ceramic plate is made to have the advantages that gas permeability is good, it can solve and commonly use Porous ceramic plate vapour lock height leads to the problem of energy consumption.
In certain embodiments, which further includes an at least middle layer ceramic layer, the middle layer ceramic layer Between the surface layer ceramic layer and the bottom ceramic layer;The average pore size of the surface layer ceramic layer is less than the middle layer ceramic layer Average pore size, the average pore size of the middle layer ceramic layer are less than the average pore size of the bottom ceramic layer.
In certain embodiments, for the porosity of the surface layer ceramic layer of the porous ceramic plate between 15% to 60%, this is more The porosity of the bottom ceramic layer of hole ceramic plate is between 30% to 90%.Preferably, the hole of the surface layer ceramic layer of the porous ceramic plate Rate is between 20% to 50%, and the porosity of the bottom ceramic layer of the porous ceramic plate is between 35% to 65%.
In certain embodiments, the whole porosity of the porous ceramic plate is between 30% to 85%.Preferably, this is porous The whole porosity of ceramic plate is between 30% to 70%.
In certain embodiments, the average pore size of the surface layer ceramic layer of the porous ceramic plate between 0.05 micron (μm) extremely 10 μm, the average pore size of the bottom ceramic layer of the porous ceramic plate is between 5 μm to 3000 μm.Preferably, the surface layer of the porous ceramic plate The average pore size of ceramic layer is between 0.3 μm to 5 μm, and the average pore size of the bottom ceramic layer of the porous ceramic plate is between 20 μm to 1500 μm.It is furthermore preferred that the average pore size of the surface layer ceramic layer of the porous ceramic plate is between 0.3 μm to 2 μm, the bottom of the porous ceramic plate is made pottery The average pore size of enamel coating is between 30 μm to 1000 μm.
The overall thickness of the porous ceramic plate, which is greater than 200 μm, can provide better support force, therefore, in some specific embodiments In, the overall thickness of the porous ceramic plate is between 200 μm to 20000 μm.Preferably, the thickness of the surface layer ceramic layer of the porous ceramic plate is situated between In 20 μm to 10000 μm;It is furthermore preferred that the thickness of the surface layer ceramic layer of the porous ceramic plate is between 30 μm to 5000 μm;It is more excellent again Choosing, the thickness of the surface layer ceramic layer of the porous ceramic plate is between 50 μm to 2000 μm.
In order to promote conductivity, it is preferred that the total content of ferriferous oxide contained by the porous ceramic plate accounts for the porous ceramic plate The 10 weight % or more of gross weight.It is furthermore preferred that the total content of ferriferous oxide contained by the porous ceramic plate accounts for the total of the porous ceramic plate The 30 weight % or more of weight.
In the case where not influencing the effect of porous ceramic plate of the invention, which can also be surface-treated, Such as: fluororesin processing, anodized, electroless metal or electroplating processes etc., but not limited to this.
In certain embodiments, the shape of the porous ceramic plate can be round, rectangular, polygon, semi-cylindrical shaped or circle Tubular etc., but not limited to this.
In certain embodiments, which further includes the plural gas passage through surface layer and bottom, each gas The width in body channel is 0.1 μm to 3000 μm.
Another object of the present invention is to provide a kind of vacuum chucks comprising just like previous porous ceramic plate and a bottom Plate, the bottom plate have the surface being connected with the porous ceramic plate.
It in certain embodiments, include plural vacuum tank on the backplate surface being connected with the porous ceramic plate.
Another object of the present invention is to provide a kind of contactless application apparatus comprising a porous ceramic plate as the aforementioned And an ontology, the ontology is towards including an at least air channel on a surface of the porous ceramic plate.For example, this is contactless Application apparatus can be contactless transportation system or Precision measurement platform, but not limited to this.
When the air channel that the contactless application apparatus is included is connect with Vacuum generating system, the air channel is For vacuum tank, it is possible to provide suction;It is described when the air channel that the contactless application apparatus is included to gas system with connecting Air channel is to air drain, it is possible to provide thrust;In addition, can also by interval setting vacuum tank with provided up simultaneously to air drain it is flat The suction and thrust of weighing apparatus, thus provide stable air cushion layer, maintain work package can steadily, and be not easy to be removed from the body.
The contactless transportation system is because having zero frictional force, zero consume, being not necessary to use lubricating oil and high speed, flat The advantages that steady, the problems such as reducing the collision or scratch of transport process, and reduce because contactless the machine of electrostatic produced by friction Meeting promotes manufacturing method yield, is suitble to transport in high precision or the object of large area, such as large size liquid crystal display etc., but not It is limited to this.The contactless transportation system includes air floating platform, air bearing sliding rail or air-bearing etc., but not limited to this.
The Precision measurement platform due to stablize because having uniform air cushion layer and can provide stable Floating Height, maintain work Workpiece is not shaken, and regulates and controls plane precision to a few micrometers hereinafter, buckling problem caused by overcoming because of work package weight itself, Offer more accurately positions and smaller operating error, can be applied to the design of large-scale detection platform.
Detailed description of the invention
Fig. 1 is the sectional schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the SEM photograph of the surface layer ceramic layer of the embodiment of the present invention 1.
Fig. 3 is the SEM photograph of the bottom ceramic layer of the embodiment of the present invention 1.
Fig. 4 is the SEM photograph of the bottom ceramic layer of the embodiment of the present invention 2.
Fig. 5 is the SEM photograph of the embodiment of the present invention 3.
Fig. 6 is the sectional schematic diagram of the embodiment of the present invention 4.
Fig. 7 is the SEM photograph of the bottom ceramic layer of the embodiment of the present invention 4.
Fig. 8 is the SEM photograph of the embodiment of the present invention 5.
Fig. 9 is the side schematic view of the embodiment of the present invention 6.
Figure 10 is the schematic diagram that the embodiment of the present invention 6 adsorbs work package.
Figure 11 is the side schematic view of the embodiment of the present invention 7.
Figure 12 is the side schematic view of the embodiment of the present invention 8.
Specific embodiment
Hereinafter, those skilled in the art can easily understand the attainable advantage of institute of the invention from following embodiment And effect.It is therefore understood that narration proposed in this paper is merely illustrative preferred embodiment rather than for limiting to this The range of invention, without departing from the spirit and scope of the present invention, various modifications can be carried out, change to implement or Using the contents of the present invention.
After following example 1 completes the production of porous ceramic plate to embodiment 5, porous ceramic plate is measured using Archimedes method Porosity, another scanning electron microscope (the Scanning Electron for using model Hitachi FlexSEM 1000 Microscope, SEM) observe the type looks of the porous ceramic plate.
The preparation method of the porous ceramic plate of embodiment 1
Firstly, complete surface layer ceramic raw material and bottom ceramic raw material: the surface layer ceramic raw material includes the first as thickener Base cellulose and ferriferous oxide, Mn oxide, chromated oxide metal oxide, and ferriferous oxide accounts for surface layer ceramic raw material Gross weight 30 weight %, Mn oxide accounts for 40 weight % of the gross weight of surface layer ceramic raw material;Metal oxygen in the ceramic raw material of surface layer For the partial size of compound between 0.3 μm to 1.5 μm, average grain diameter is 0.5 μm;The bottom ceramic raw material includes the methyl as thickener Cellulose and ferriferous oxide, Mn oxide, chromated oxide metal oxide, and to account for bottom ceramic raw material total for ferriferous oxide 30 weight % of weight, Mn oxide account for 40 weight % of the gross weight of bottom ceramic raw material;Metal oxide in bottom ceramic raw material Partial size between 3 μm to 15 μm, average grain diameter is 8 μm, is greater than the average grain diameter of metal oxide in the ceramic raw material of surface layer.
Then, the surface layer ceramic raw material and the bottom ceramic raw material are respectively rolled over rolling-molding method roller and is shaped, obtained The rectangular raw embryo shaped to a surface layer ceramic raw material and the rectangular raw embryo of bottom ceramic raw material forming.
The raw embryo shaped by surface layer ceramic raw material is placed in the raw embryo shaped by bottom ceramic raw material again Top, two raw embryos are stacked to form a lamination after, which is rolled over rolling-molding method roller and is shaped, lamination after obtaining a forming, It can be cut and be processed again before sintering or after sintering according to required shape.
Lamination after the forming is sintered 7 hours with 950 DEG C of temperature, and obtaining one includes surface layer ceramic layer 110 and bottom The double-layer porous ceramic plate 10 of layer ceramic layer 120, section structure is as shown in Figure 1.
The overall thickness of the double-layer porous ceramic plate 10 of embodiment 1 be 5000 μm, wherein surface layer ceramic layer 110 with a thickness of 500 μm.In addition, the total content for the ferriferous oxide that double-layer porous ceramic plate 10 is included accounts on the basis of the gross weight of double-layer porous ceramic plate 10 30 weight %, the total content of Mn oxide account for 40 weight %.
Referring to FIG. 1, comprising plural metal oxide particle 111 and plural hole 112 in surface layer ceramic layer 110, and Include plural metal oxide particle 121 and plural hole 122 in bottom ceramic layer 120.
Fig. 2, Fig. 3 are please referred to, is learnt through scanning electron microscope observation, the average pore size of surface layer ceramic layer 110 is 0.5 μm, the average pore size of bottom ceramic layer 120 is 5 μm.
It is learnt through measuring, the porosity of surface layer ceramic layer 110 is about 36%, and the porosity of bottom ceramic layer 120 is about 45%, and the whole porosity of double-layer porous ceramic plate 10 is about 44%.
The preparation method of the porous ceramic plate of embodiment 2
The step of preparation method of embodiment 2 is to the preparation method of embodiment 1 is similar, and difference is: bottom ceramics are former The PMMA ball as pore-creating filler is added in material, accounts for 7 weight % of the gross weight of bottom ceramic raw material.Because the bottom ceramics are former Pore-creating filler is added in material, therefore makes the bottom ceramic layer of double-layer porous ceramic plate after sintering in addition to originally because ceramic raw material stacks simultaneously It is formed by outside hole after sintering, burns mistake there are also pore creating material and be formed by larger hole, not only make the average hole of bottom ceramic layer Diameter increases, and the porosity of bottom ceramic layer is also significantly increased, reduces vapour lock.The double-layer porous ceramic plate of embodiment 2, surface layer ceramics The average pore size of layer is 0.5 μm and its porosity is about 36%;Referring to FIG. 4, the average pore size of bottom ceramic layer is 8 μm, And its porosity is about 55%, and the whole porosity of double-layer porous ceramic plate is about 53%.
The preparation method of the porous ceramic plate of embodiment 3
The step of preparation method of embodiment 3 is to the preparation method of embodiment 1 is similar, and difference is: embodiment 1 and reality It is different with bottom ceramic raw material or content to apply the surface layer ceramic raw material that example 3 respectively selects.The surface layer ceramic raw material includes as increasing Thick dose of methylcellulose and ferriferous oxide, Mn oxide, chromated oxide metal oxide, and ferriferous oxide accounts for surface layer 30 weight % of ceramic raw material gross weight, Mn oxide account for 40 weight % of the gross weight of surface layer ceramic raw material;In the ceramic raw material of surface layer For the partial size of metal oxide between 3 μm to 15 μm, average grain diameter is 8 μm.The bottom ceramic raw material and the surface layer ceramic raw material phase Seemingly, difference is only that the PMMA ball as pore-creating filler is added in the bottom ceramic material, accounts for the gross weight of bottom ceramic raw material 7 weight %.Because pore-creating filler is added in the bottom ceramic raw material, therefore it is being sintered the bottom ceramic layer of double-layer porous ceramic plate Afterwards, it, because ceramic raw material stacks and other than being formed by hole after being sintered, burns to lose there are also pore creating material in addition to originally and is formed by large hole Hole not only increases the average pore size of bottom ceramic layer, and the porosity of bottom ceramic layer is also significantly increased, reduces vapour lock.It please join Fig. 5 is examined, the double-layer porous ceramic plate of embodiment 3, the average pore size of surface layer ceramic layer is 5 μm and its porosity is about 45%; The average pore size of bottom ceramic layer is 8 μm and its porosity is about 55%, and the whole porosity of double-layer porous ceramic plate is about 52%.
The preparation method of the porous ceramic plate of embodiment 4
Firstly, complete surface layer ceramic raw material, middle layer ceramic raw material and bottom ceramic raw material: the surface layer ceramic raw material includes As the silica and aluminium oxide of binder, the methylcellulose as thickener and ferriferous oxide, Mn oxide, chromium oxygen Compound, cobalt/cobalt oxide, calcium oxide, magnesium oxide, aluminum oxide metal oxide, wherein ferriferous oxide account for surface layer ceramics 20 weight % of the gross weight of raw material, chromated oxide account for 15 weight % of the gross weight of surface layer ceramic raw material;It is golden in the ceramic raw material of surface layer Belong to the partial size of oxide between 0.3 μm to 1.5 μm, average grain diameter is 0.5 μm.The middle layer ceramic raw material includes to be used as binder Silica and aluminium oxide, the methylcellulose as thickener and ferriferous oxide, Mn oxide, chromated oxide, cobalt oxide Compound, calcium oxide, magnesium oxide, aluminum oxide metal oxide, wherein ferriferous oxide accounts for middle layer ceramic raw material gross weight 20 weight %, chromated oxide accounts for 15 weight % of the gross weight of surface layer ceramic raw material;Metal oxide in middle layer ceramic raw material Partial size between 3 μm to 15 μm, average grain diameter is 8 μm.The bottom ceramic raw material includes the silica as binder, conduct The methylcellulose and ferriferous oxide of thickener, Mn oxide, chromated oxide, cobalt/cobalt oxide, calcium oxide, magnesium oxide, The metal oxide of aluminum oxide, wherein ferriferous oxide accounts for 20 weight % of surface layer ceramic raw material gross weight;In bottom ceramic raw material For the partial size of metal oxide between 20 μm to 100 μm, average grain diameter is 60 μm.
Then, by the surface layer ceramic raw material, the middle layer ceramic raw material and the bottom ceramic raw material respectively with pressure Prolong method of forming roller roll over forming, obtain a surface layer ceramic raw material forming raw embryo, a middle layer ceramic raw material forming raw embryo, and The raw embryo of one bottom ceramic raw material forming.
The raw embryo shaped by middle layer ceramic raw material is placed in the raw embryo shaped by bottom ceramic raw material Top;Then, then by the raw embryo shaped by surface layer ceramic raw material it is placed in the life shaped by middle layer ceramic raw material The top of embryo is stacked after forming a lamination by three raw embryos, which is rolled over rolling-molding method roller and is shaped, after obtaining a forming Lamination.
Lamination after the forming is sintered 7 hours with 950 DEG C of temperature, and obtaining one includes surface layer ceramic layer 110, centre Three layers of porous ceramic plate 10 ' of layer ceramic layer 130 and bottom ceramic layer 120, section structure are as shown in Figure 6.
The overall thickness of three layers of porous ceramic plate 10 ' is 5000 μm, wherein surface layer ceramic layer with a thickness of 500 μm, and it is intermediate Layer ceramic layer with a thickness of 500 μm.In addition, on the basis of the gross weight of three layers of porous ceramic plate 10 ', three layers of porous ceramic plate 10 ' include Ferriferous oxide content account for 20 weight %.
Referring to FIG. 6, comprising plural metal oxide particle 111 and plural hole 112 in surface layer ceramic layer 110, it is intermediate Comprising including multiple in plural metal oxide particle 131 and plural hole 132 and bottom ceramic layer 120 in layer ceramic layer 130 Number metal oxide particle 121 and plural hole 122.
Through learning that the porosity of surface layer ceramic layer 110 is about 36%, middle layer ceramic layer such as method same as before observation 130 porosity is about 45%, and the porosity of bottom ceramic layer 120 is 55%, and the whole porosity of three layers of porous ceramic plate 10 ' It is about 53%.
Through learning such as method same as before measurement, the average pore size of surface layer ceramic layer 110 is 0.5 μm, middle layer ceramics The average pore size of layer 130 is 5 μm, referring to FIG. 7, the average pore size of bottom ceramic layer 120 is 40 μm.
The preparation method of the porous ceramic plate of embodiment 5
The step of preparation method of embodiment 5 is to the preparation method of embodiment 4 is similar, and difference is: embodiment 4 and reality It is different to apply the example 5 surface layer ceramic raw materials not selected, middle layer ceramic raw material and bottom ceramic raw material or content.Embodiment 5 Surface layer ceramic raw material is identical as the surface layer ceramic raw material of embodiment 1;The middle layer ceramic raw material of embodiment 5 includes to be used as thickener Methylcellulose and ferriferous oxide, Mn oxide, chromated oxide metal oxide, and ferriferous oxide account for middle layer pottery 30 weight % of porcelain raw material gross weight, Mn oxide account for 40 weight % of the gross weight of middle layer ceramic raw material;Middle layer ceramic raw material For the partial size of middle metal oxide between 3 μm to 15 μm, average grain diameter is 8 μm, is greater than metal oxide in the ceramic raw material of surface layer Average grain diameter;The bottom ceramic raw material of embodiment 5 includes as the methylcellulose of thickener, as pore-creating filler PMMA ball and ferriferous oxide, Mn oxide, chromated oxide metal oxide, and to account for bottom ceramic raw material total for ferriferous oxide 30 weight % of weight, Mn oxide account for 40 weight % of the gross weight of bottom ceramic raw material;Metal oxide in bottom ceramic raw material Partial size between 3 μm to 15 μm, average grain diameter is 8 μm, is greater than the average grain diameter of metal oxide in the ceramic raw material of surface layer;Separately Outside, the content of PMMA ball contained by embodiment 5 is greater than 7 weight % of the gross weight of the bottom ceramic raw material, and its partial size is relatively implemented The partial size for the PMMA ball that example 2 uses is bigger.Referring to FIG. 8, three layers of porous ceramic plate of embodiment 5, surface layer ceramic layer are averaged Aperture is 0.5 μm, and the average pore size of middle layer ceramic layer is 5 μm, and the average pore size of bottom ceramic layer is 40 μm, surface layer ceramics The porosity of layer is about 36%, and the porosity of middle layer ceramic layer is about 45%, and the porosity of bottom ceramic layer is about 55%, And the whole porosity of three layers of porous ceramic plate is about 52%.
The vacuum chuck of embodiment 6
Referring to FIG. 9, embodiment 6 is a vacuum chuck comprising the porous ceramic plate 10 of embodiment 1 and a bottom plate 20, The bottom plate 20 has the surface 201 being connected with porous ceramic plate 10.It include plural vacuum on the surface 201 of the bottom plate 20 Slot 22 and a vacuum line 21, these vacuum tanks 22 are connected with vacuum line 21.Referring to FIG. 10, the vacuum chuck is also It may include fixing component 40, the position to the porous ceramic plate 10 of fixation.
Fig. 9, Figure 10 are please referred to, using the bottom plate of the vacuum chuck of a Vacuum generating system (not shown) and embodiment 6 20 vacuum line 21 is connected.The negative-pressure sucking provided by Vacuum generating system, is dispersed to the plural vacuum tank 22 of bottom plate 20, and Across the plural hole that porous ceramic plate 10 is included, the uniform suction of plural number is formd, it is not only adsorbable, fix a work package 30, The work package 30 can maintain steadily, to avoid damage work package 30.
The Precision measurement platform of embodiment 7
Figure 11 is please referred to, embodiment 7 is a Precision measurement platform comprising the porous ceramic plate 10 of embodiment 1 and one Body 50, the ontology 50 have towards a surface 501 of porous ceramic plate 10.Include plural vacuum tank 22 on the surface 501 with And plural number gives air drain 24;These vacuum tanks 22 are connected with a vacuum line 21, these give 23 phase of air pipe with one to air drain 24 Connection.Be connected using a Vacuum generating system (not shown) with vacuum line 21, at the same by one to gas system (not shown) with It is connected to air pipe 23.The negative-pressure sucking provided by Vacuum generating system, is dispersed to the plural vacuum tank 22 of ontology 50, and pass through The plural hole that porous ceramic plate 10 is included forms the uniform suction of plural number;And the thrust by being provided to gas system, it is dispersed to this These of body 50 give air drain 24, and pass through the plural hole that porous ceramic plate 10 is included, and form the uniform thrust of plural number.By Every setting vacuum tank and the suction and thrust that are formed simultaneously to air drain, stable air cushion layer is provided.
The contactless transportation system of embodiment 8
Please refer to Figure 12, embodiment 8 is a contactless transportation system comprising the porous ceramic plate 10 of embodiment 1 and One ontology 50 ', the ontology 50 ' have the surface 501 towards porous ceramic plate 10 ".The surface 501 " on include to air drain 24, it should be connected with one to air pipe 23 to air drain 24.The thrust that gas generates is provided to gas system (not shown) by one, and Across the plural hole that porous ceramic plate 10 is included, the uniform thrust of plural number is formd, stable air cushion layer is provided and fortune is provided Send effect.
Experimental result discussion
Compared with existing preparation method, preparation method of the invention keeps manufacturing method easy because step is simple, easy to operate In control, and then promote the production yield for preparing porous ceramic plate;And it is once sintered because only carrying out, not only it can simplify preparation procedure also It can be energy saving;In addition, because being disposably sintered so that embodiment 1 to embodiment 5 porous ceramic plate entirety hole point Cloth is uniform, has fine air permeability, and then promote the quality of porous ceramic plate.
The surface layer ceramic layer of porous ceramic plate through the invention has lesser average pore size, even if very thin for fixation When work package (such as wafer), it so that work package is kept flat indeformable, be conducive to work package accurately measuring or processing;And And this porous ceramic plate is subsequent when being connected with vacuum system, by the bottom ceramic layer there is biggish average pore size to allow vapour lock Reduce, energy consumption can be reduced and enough support forces are provided.In addition, because surface layer ceramic layer has lesser average pore size, when its work When for absorption platform, because air leakage is low, therefore the work package being adsorbed in local absorption can be applied to be not required to be completely covered on absorption On platform.Also, because the middle layer that porous ceramic plate of the invention is compounded with tool larger aperture in the lower layer of surface layer ceramic layer is ceramic Layer and/or bottom ceramic layer, therefore can provide larger support force and larger adsorption capacity, it takes into account and reduces vapour lock and maintain whole ceramic plate Rigidity reaches larger adsorption capacity, reduces energy consumption, avoids porous ceramic plate from keeping vapour lock excessive due to being integrally all tiny aperture, surface The problem of adsorption capacity lowers.
Although preceding description has illustrated many feature, advantages of the invention and composition of the invention and characteristic details, This only belongs to illustratively illustrate.All in the range represented by the general connotation of claims of the present invention, according to this hair Variations in detail made by bright principle refers in particular to the change of shape, size and element setting, still falls in the scope of the present invention.

Claims (13)

1. a kind of preparation method of porous ceramic plate, it includes following steps:
Step a): complete plural number ceramic raw material, these ceramic raw materials respectively include surface layer ceramic raw material and bottom ceramic raw material, In the average grain diameter of the surface layer ceramic raw material metal oxide that is included be less than or equal to 20 microns;Contained by these ceramic raw materials Ferriferous oxide content account for the 20 weight % or more of these ceramic raw material gross weights;
Step b): after respectively step is formed in these ceramic raw materials, the plural number shaped by these ceramic raw materials is respectively obtained Raw embryo;
Step c): these raw embryos being folded and set to form a lamination, which includes the raw embryo of surface layer ceramic raw material forming and be somebody's turn to do The raw embryo of bottom ceramic raw material forming;Step is formed in the lamination, the lamination after obtaining a forming;And
Step d): the lamination after being sintered the forming, to obtain a porous ceramic plate, wherein the porous ceramic plate includes mutually folded sets One surface layer ceramic layer and a bottom ceramic layer;Between 0.3 micron to 10 microns, which makes pottery the average pore size of the surface layer ceramic layer The average pore size of enamel coating is between 20 microns to 3000 microns;The whole porosity of the porous ceramic plate is between 30% to 85%.
2. the preparation method of porous ceramic plate according to claim 1, wherein the oxidation of metal contained by the surface layer ceramic raw material The average grain diameter of object is less than the average grain diameter of metal oxide contained by the bottom ceramic raw material.
3. the preparation method of porous ceramic plate according to claim 1, wherein the bottom ceramic raw material adds pore-creating filling Agent.
4. the preparation method of porous ceramic plate according to claim 1, wherein these ceramic raw materials respectively use in step b) Rolling-molding method is to be formed step.
5. the preparation method of porous ceramic plate according to claim 4, wherein the lamination uses rolling-molding method in step c) Step is formed.
6. the preparation method of porous ceramic plate according to any one of claim 1 to 5, wherein the plural number in step a) Ceramic raw material further includes an at least middle layer ceramic raw material;And
In step d), which further includes that an at least middle layer ceramic layer, the average pore size of the surface layer ceramic layer is less than The average pore size of the middle layer ceramic layer, the average pore size of the middle layer ceramic layer are less than the average pore size of the bottom ceramic layer.
7. the preparation method of porous ceramic plate according to any one of claim 1 to 5, wherein the sintering in step d) Temperature is 500 DEG C to 1250 DEG C.
8. a kind of porous ceramic plate comprising the mutually folded surface layer ceramic layer and bottom ceramic layer set;Wherein, the surface layer ceramic layer Average pore size is between 0.3 micron to 10 microns, and the average pore size of the bottom ceramic layer is between 20 microns to 3000 microns;This is porous The whole porosity of ceramic plate is between 30% to 85%;Ferriferous oxide content contained by the porous ceramic plate accounts for the gross weight of the porous ceramic plate 20 weight % or more.
9. porous ceramic plate according to claim 8, wherein the porous ceramic plate further includes an at least middle layer ceramic layer, should Middle layer ceramic layer is located between the surface layer ceramic layer and the bottom ceramic layer;The average pore size of the surface layer ceramic layer is less than in this The average pore size of interbed ceramic layer, the average pore size of the middle layer ceramic layer are less than the average pore size of the bottom ceramic layer.
10. porous ceramic plate according to claim 8, wherein the porosity of the surface layer ceramic layer, should between 15% to 60% The porosity of bottom ceramic layer is between 30% to 90%.
11. the porous ceramic plate according to any one of claim 8 to 10, wherein the overall thickness of the porous ceramic plate is between 200 Micron is to 20000 microns, and the thickness of the surface layer ceramic layer is between 20 microns to 10000 microns.
12. a kind of vacuum chuck comprising a porous ceramic plate and a bottom according to any one of claim 8 to 11 Plate, the bottom plate have the surface being connected with the porous ceramic plate.
13. a kind of contactless application apparatus comprising a porous ceramic plate according to any one of claim 8 to 11 with And an ontology, the ontology towards the surface of the porous ceramic plate include an at least air channel.
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CN111170759A (en) * 2020-01-13 2020-05-19 山东晟世达科技有限公司 Method for manufacturing non-mould naked-firing foamed ceramic
CN111170759B (en) * 2020-01-13 2022-04-29 山东晟世达科技有限公司 Method for manufacturing non-mould naked-firing foamed ceramic
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CN115724682A (en) * 2021-09-02 2023-03-03 台湾中国砂轮企业股份有限公司 Air floating assembly and manufacturing method thereof
CN115724682B (en) * 2021-09-02 2023-06-20 台湾中国砂轮企业股份有限公司 Air floatation assembly and manufacturing method thereof

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