CN116675521A - AlON combined corundum slide plate and preparation method thereof - Google Patents
AlON combined corundum slide plate and preparation method thereof Download PDFInfo
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- CN116675521A CN116675521A CN202310690164.0A CN202310690164A CN116675521A CN 116675521 A CN116675521 A CN 116675521A CN 202310690164 A CN202310690164 A CN 202310690164A CN 116675521 A CN116675521 A CN 116675521A
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- corundum
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- calcium nitrate
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- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 74
- 239000010431 corundum Substances 0.000 title claims abstract description 74
- 229910017109 AlON Inorganic materials 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 11
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 28
- ZHJGWYRLJUCMRT-UHFFFAOYSA-N 5-[6-[(4-methylpiperazin-1-yl)methyl]benzimidazol-1-yl]-3-[1-[2-(trifluoromethyl)phenyl]ethoxy]thiophene-2-carboxamide Chemical compound C=1C=CC=C(C(F)(F)F)C=1C(C)OC(=C(S1)C(N)=O)C=C1N(C1=C2)C=NC1=CC=C2CN1CCN(C)CC1 ZHJGWYRLJUCMRT-UHFFFAOYSA-N 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000010304 firing Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000007767 bonding agent Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 15
- 229910052799 carbon Inorganic materials 0.000 abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 238000005121 nitriding Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 238000009749 continuous casting Methods 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 235000019580 granularity Nutrition 0.000 description 12
- 230000035939 shock Effects 0.000 description 11
- 239000002893 slag Substances 0.000 description 11
- 230000003628 erosive effect Effects 0.000 description 9
- 230000035515 penetration Effects 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 7
- 241000276425 Xiphophorus maculatus Species 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002905 metal composite material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- -1 aluminum zirconium carbon Chemical compound 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ICSSIKVYVJQJND-UHFFFAOYSA-N calcium nitrate tetrahydrate Chemical compound O.O.O.O.[Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ICSSIKVYVJQJND-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped 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 aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/3865—Aluminium nitrides
- C04B2235/3869—Aluminium oxynitrides, e.g. AlON, sialon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/443—Nitrates or nitrites
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of refractory materials, in particular to an AlON combined corundum slide plate and a preparation method thereof, wherein the AlON combined corundum slide plate comprises the following raw materials in percentage by weight: 45-94% of corundum, 5-30% of activated alumina, 1-15% of metallic aluminum and 0.1-10% of calcium nitrate. The AlON-combined corundum slide plate does not contain carbon, does not need nitriding firing, and realizes nitriding of metal aluminum by means of NO (g) released by high-temperature decomposition of calcium nitrate (preferably calcium nitrate tetrahydrate). The slide plate disclosed by the invention is simple in preparation process, rich in raw materials, excellent in cost performance, and easy to control in sintering process, and cannot cause secondary C, H, O and other impurity pollution when being used for continuous casting of clean steel.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an AlON combined corundum slide plate and a preparation method thereof.
Background
Because graphite has the advantages of high heat conductivity, poor wettability to molten iron and oxide slag, and the like, carbon-containing sliding plates are always mainstream products in iron and steel enterprises. However, the traditional aluminum carbon and aluminum zirconium carbon sliding plates can lead to carburetion of molten steel in the use process, so that the smelting requirement of clean steel cannot be met. To reduce the carbon content in the skateboard, hong Yanre et al propose a metal composite low carbon or even carbon free refractory. A small amount of metal phase is added to the carbon composite refractory material, and the carbon composite refractory material mainly functions as an antioxidant for protecting carbon. In the practical use process, researchers find that the metal phase can react to form a non-oxide phase in addition to the oxidation resistance function in the carbon composite refractory material. The metal composite refractory material utilizes the in-situ nitriding/carbonizing reaction of the metal phase in the refractory material, increases the metal addition amount in the refractory material, and uses nitrogen as a nitrogen source and CO (g) or C as a carbon source to realize the in-situ nitriding of the metal phase in the refractory material to form non-oxide combination in the sintering/using process.
At present, the metal in the metal composite refractory material is mainly Al, and Al exists in an Al-O-C-N system 4 O 4 C、(Al 2 OC) x (AlN) 1-x Non-oxide phases of excellent performance such as AlN polymorphs, etc., but metallic aluminum reacts to form intermediate phases Al of these non-oxides 4 C 3 But are extremely hydrated and the volume expansion resulting from the hydration reaction is fatal to the destruction of the refractory material. At present, no completely effective method for avoiding Al in metal composite refractory material exists 4 C 3 On one hand, the measures adopted in the actual production mainly prolong the heat preservation time in the sintering process and promote Al 4 C 3 Fully converting; on one hand, the fired sliding plate is subjected to asphalt dipping treatment so as to seal open pores on the surface of the sliding plate. However, this clearly increases the production cost, and impregnating bitumen presents a number of environmental problems.
AlON is a spinel type solid solution with a melting point of 1940 ℃. The preparation method is used for preparing the high-grade composite refractory material in the field of refractory materials, can improve the high-temperature mechanical property, thermal shock stability, slag resistance, molten steel scouring resistance and the like of the refractory material, and has the advantages of energy conservation and environmental protection.
Disclosure of Invention
The invention aims to solve the technical problem of providing an AlON combined corundum slide plate and a preparation method thereof. The AlON-combined corundum slide plate does not contain carbon, does not need nitriding firing, and realizes nitriding of metal aluminum by means of NO (g) released by high-temperature decomposition of calcium nitrate (preferably calcium nitrate tetrahydrate). The slide plate disclosed by the invention is simple in preparation process, rich in raw materials, excellent in cost performance, and easy to control in sintering process, and cannot cause secondary C, H, O and other impurity pollution when being used for continuous casting of clean steel.
In the invention, it can be understood that the AlON-bonded corundum sliding plate refers to a sliding plate made of mixed materials of AlON-bonded corundum.
In order to solve the technical problems, the invention provides the following technical scheme:
the first aspect provides an AlON combined corundum slide plate, which comprises the following raw materials in percentage by weight: 45-94% of corundum, 5-30% of activated alumina, 1-15% of metallic aluminum and 0.1-10% of calcium nitrate.
Preferably, the corundum mass content is 55% -85%.
Wherein, preferably, the corundum comprises three granularities of 3-1.0mm, 0.9-0.10mm and 0.09-0mm, and the mass content ratio of the three granularities is as follows: based on the total mass of corundum, the proportion of the corundum with the granularity of 3-1.0mm is 40% -65%, the proportion of the corundum with the granularity of 0.9-0.10mm is 18% -30%, and the proportion of the corundum with the granularity of 0.09-0mm is 17% -30%. According to the preferable scheme, the corundum granularity distribution is reasonable, so that the close accumulation of particles in the material forming process can be realized, and the mechanical strength of the material can be improved more easily.
Wherein preferably, the corundum comprises platy corundum and white corundum, and the mass ratio of platy corundum to white corundum is more than 2:1. according to the preferable scheme, the platy corundum and the white corundum are matched and are suitable in proportion, so that the thermal shock stability and the wear resistance of the sliding plate can be considered, and the use performance of the material can be improved.
Wherein preferably the activated alumina particle size is 0.1-0mm; the granularity of the metal aluminum is 0.1-0mm.
Wherein preferably, the raw materials further comprise a bonding agent, the bonding agent comprises phenolic resin, and the content of the bonding agent is 2% -6% of the total amount of other raw materials except the bonding agent.
Wherein preferably the calcium nitrate is introduced in the form of calcium nitrate tetrahydrate. According to the preferable scheme, compared with anhydrous calcium nitrate, the tetrahydrate calcium nitrate can be melted in the mixing process of the material, so that the uniformity of the material is improved.
A second aspect provides a method for preparing the AlON-bonded corundum skateboard according to the first aspect, which comprises the following steps:
s1, weighing corundum, activated alumina, metal aluminum and calcium nitrate according to a proportion, adding a bonding agent, and uniformly mixing to prepare pug;
s2, pressing the pug in the step S1 to form, drying, sintering under the air condition, hooping, grinding and coating to obtain the finished product.
Wherein preferably, the conditions of the drying include: the drying temperature is 120-500 ℃ and the drying time is 5-25h.
Wherein preferably, the firing conditions include: the temperature is 1200-1600 ℃ and the time is 3-20h.
The technical scheme of the invention has the following beneficial effects:
according to the invention, NO (g) generated by thermal decomposition of calcium nitrate (preferably calcium nitrate tetrahydrate) is used as a nitrogen source, and the preparation of the AlON combined corundum slide plate is realized under the high-temperature air condition. Calcium nitrate (preferably calcium nitrate tetrahydrate) is converted to calcium nitrite (reaction formula (1) and reaction formula (2) below) before being heated to 500 ℃. Heating is continued and the metallic aluminum melts while the calcium nitrite decomposes to produce NO (g) and CaO (equation (3)). As the firing temperature continues to rise, the metallic aluminum reacts with NO (g) to form AlN and Al 2 O 3 (equation (4)), alN, al is formed in succession 2 O 3 Together with the corundum raw material, an AlON spinel solid solution is formed (equation (5)). While the remaining CaO is converted in the material to high melting point calcium hexaaluminate (equation (6)).
Ca(NO 3 ) 2 ·4H 2 O(l)→Ca(NO 3 ) 2 (s) (1)
Ca(NO 3 ) 2 (s)→Ca(NO 2 ) 2 (l) (2)
Ca(NO 2 ) 2 (l)→NO(g)+CaO(s) (3)
Al(l)+NO(g)→AlN(s)+Al 2 O 3 (s) (4)
AlN(s)+Al 2 O 3 (s)→AlON sp (s) (5)
CaO(s)+Al 2 O 3 (s)→CaAl 12 O 19 (s) (6)
The invention has the following advantages:
(1) When calcium nitrate (preferably calcium nitrate tetrahydrate) is used as a nitrogen source, the AlON combined corundum slide plate does not need nitriding and sintering;
(2) Because of no carbonaceous raw materials, alON combines with corundum skateboards without the risk of hydration, and the preparation process does not need to promote Al 4 C 3 Fully converting and preserving heat for a long time;
(3) The residual calcium oxide after decomposing the calcium nitrate reacts with corundum to form high-melting-point calcium hexaaluminate, so that the material performance is not affected;
(4) The preparation method is simple, the firing process is simple and easy to control, and the performance index of the produced product is excellent. For example, in some embodiments, the apparent porosity is 4% to 15%, the bulk density is 3.0 to 3.4g/cm 3 The normal temperature compressive strength is 180-280MPa, and the high temperature flexural strength is 15-55MPa.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention more apparent, the following detailed description will be made with reference to specific embodiments.
Example 1
Mixing 75% of corundum, 15% of activated alumina, 7% of metal aluminum powder and 3% of calcium nitrate tetrahydrate, adding 2% of thermosetting phenolic resin binder into the mixture, uniformly mixing, and pressing and forming; firstly, drying at 200 ℃ for 5 hours, and then sintering at 1300 ℃ for 6 hours at high temperature; then hooping, grinding and coating are carried out to prepare the AlON combined corundum slide plate. The granularity of the activated alumina is 0.1-0mm; the granularity of the metal aluminum is 0.1-0mm.
Wherein the raw material corundum is divided into platy corundum and white corundum, and the mass ratio of platy corundum to white corundum is 3:1, respectively forming plate-shaped corundum and white corundum by three granularities of 3-1.0mm, 0.9-0.10mm and 0.09-0mm, wherein the mass content ratio of the three granularities is as follows: the proportion of the particle size of 3-1.0mm is 50%, the proportion of the particle size of 0.9-0.10mm is 25% and the proportion of the particle size of 0.09-0mm is 25% based on the total mass of the corresponding corundum.
The AlON combined corundum slide plate has a apparent porosity of 6.5% and a bulk density of 3.31g/cm 3 The normal temperature compressive strength is 226MPa, the high temperature flexural strength is 35MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are all good.
Example 2
Reference was made to example 1, except that 3% of the thermosetting phenolic resin binder of the above mixture was added.
The AlON combined corundum slide plate has a apparent porosity of 6.3% and a bulk density of 3.31g/cm 3 The normal temperature compressive strength is 229MPa, the high temperature flexural strength is 37MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are all good.
Example 3
Reference example 1 was made, except that the partial raw materials were used in different amounts, specifically, 10% of activated alumina, 10% of metal aluminum powder, and 5% of calcium nitrate tetrahydrate.
The AlON combined corundum slide plate has a apparent porosity of 6.3% and a bulk density of 3.31g/cm 3 The normal temperature compressive strength is 275MPa, the high temperature flexural strength is 45MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are all good.
Example 4
Reference example 1 was made, except that the amounts of the partial raw materials were varied, specifically, 0.5% calcium nitrate tetrahydrate, 17.5% activated alumina.
The AlON combined corundum slide plate has a apparent porosity of 6.7% and a bulk density of 3.30g/cm 3 The normal temperature compressive strength is 205MPa, high-temperature flexural strength of 33MPa, and thermal shock resistance, erosion resistance and slag penetration resistance of the composite material are good.
Example 5
Reference example 1 was made, except that the partial raw material amounts were varied, specifically 10% calcium nitrate tetrahydrate, 8% activated alumina.
The AlON combined corundum slide plate has the apparent porosity of 7.5% and the volume density of 3.30g/cm 3 The normal temperature compressive strength is 210MPa, the high temperature flexural strength is 36MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are good.
Example 6
With reference to example 1, the difference is that the corresponding corundum consists of only two granularities, the mass content ratio of which is: the proportion of the particle size of 3-1.0mm is 50% and the proportion of the particle size of 0.09-0mm is 50% based on the total mass of the corresponding corundum.
The AlON combined corundum slide plate has a apparent porosity of 8.8% and a bulk density of 3.25g/cm 3 The normal temperature compressive strength is 198MPa, the high temperature flexural strength is 23MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are good.
Example 7
Reference example 1 was performed except that calcium nitrate tetrahydrate was anhydrous calcium nitrate.
The AlON combined corundum slide plate has a apparent porosity of 6.4% and a bulk density of 3.31g/cm 3 The normal temperature compressive strength is 202MPa, the high temperature flexural strength is 30MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are good.
Comparative example 1
Reference example 1 was made, except that calcium nitrate tetrahydrate was not used, and the amount of corundum was 78%.
The obtained product is detected to have apparent porosity of 7.4 percent and volume density of 3.29g/cm 3 The normal temperature compressive strength is 188MPa, the high temperature flexural strength is 30MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are poor.
Comparative example 2
Reference example 1 was made, except that the amount of calcium nitrate tetrahydrate was excessive, the amount of calcium nitrate tetrahydrate was 15%, and the amount of corundum was 63%.
The obtained product is detected to have a apparent porosity of 9.2% and a bulk density of 3.27g/cm 3 The normal temperature compressive strength is 189MPa, the high temperature flexural strength is 26MPa, and the thermal shock resistance, the erosion resistance and the slag penetration resistance are poor.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The AlON combined corundum slide plate is characterized by comprising the following raw materials in percentage by weight: 45-94% of corundum, 5-30% of activated alumina, 1-15% of metallic aluminum and 0.1-10% of calcium nitrate.
2. The AlON-bonded corundum slide plate according to claim 1, characterized in that the corundum comprises three particle sizes of 3-1.0mm, 0.9-0.10mm and 0.09-0mm, the mass content ratio of the three particle sizes is: based on the total mass of corundum, the proportion of the corundum with the granularity of 3-1.0mm is 40% -65%, the proportion of the corundum with the granularity of 0.9-0.10mm is 18% -30%, and the proportion of the corundum with the granularity of 0.09-0mm is 17% -30%.
3. The AlON-bonded corundum skateboard according to claim 1, characterized in that the corundum comprises plate-shaped corundum and white corundum, the mass ratio of plate-shaped corundum and white corundum being > 2:1.
4. the AlON-bonded corundum skateboard according to claim 1 characterized in that the activated alumina particle size is 0.1-0mm; the granularity of the metal aluminum is 0.1-0mm.
5. The AlON-bonded corundum skateboard according to claim 1 characterized in that the raw materials further comprise a binder comprising phenolic resin, the content of the binder being 2% -6% of the total amount of the raw materials other than the binder.
6. An AlON-bonded corundum skateboard according to claim 1 characterized in that the calcium nitrate is introduced in the form of calcium nitrate tetrahydrate.
7. The method for producing an AlON-bonded corundum skateboard according to any one of claims 1-6, characterized in that it comprises the steps of:
s1, weighing corundum, activated alumina, metal aluminum and calcium nitrate according to a proportion, adding a bonding agent, and uniformly stirring to prepare pug;
s2, pressing the pug in the step S1 to form, drying, sintering under the air condition, hooping, grinding and coating to obtain the finished product.
8. The method according to claim 7, wherein the conditions of drying include: the drying temperature is 120-500 ℃ and the drying time is 5-25h.
9. The method according to claim 7, wherein the firing conditions include: the temperature is 1200-1600 ℃ and the time is 3-20h.
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| KR20060089253A (en) * | 2005-02-03 | 2006-08-09 | 한국지질자원연구원 | Synthesis method of aluminum oxynitride (alon) by self-propagating method |
| JP2009292711A (en) * | 2008-06-02 | 2009-12-17 | Okayama Ceramics Gijutsu Shinko Zaidan | Aluminum oxynitride and production method of the same |
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| CN103265292A (en) * | 2013-05-31 | 2013-08-28 | 哈尔滨工业大学 | Combustion-synthesis fusion-casting method of Al23O27N5 ceramic |
| CN105294081A (en) * | 2015-11-25 | 2016-02-03 | 北京科技大学 | Preparation method of Al5O6N-combined corundum composite refractory material |
| CN113185301A (en) * | 2021-04-23 | 2021-07-30 | 北京科技大学 | Rapid preparation method of AlON transparent ceramic |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20060089253A (en) * | 2005-02-03 | 2006-08-09 | 한국지질자원연구원 | Synthesis method of aluminum oxynitride (alon) by self-propagating method |
| JP2009292711A (en) * | 2008-06-02 | 2009-12-17 | Okayama Ceramics Gijutsu Shinko Zaidan | Aluminum oxynitride and production method of the same |
| CN103214256A (en) * | 2013-05-10 | 2013-07-24 | 北京科技大学 | Al23O27N5-combined corundum composite slide plate and preparation method thereof |
| CN103265292A (en) * | 2013-05-31 | 2013-08-28 | 哈尔滨工业大学 | Combustion-synthesis fusion-casting method of Al23O27N5 ceramic |
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