CN1204678A - Calcium silicate thermal insulation fireproof material and manufacturing method thereof - Google Patents
Calcium silicate thermal insulation fireproof material and manufacturing method thereof Download PDFInfo
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- CN1204678A CN1204678A CN98102760A CN98102760A CN1204678A CN 1204678 A CN1204678 A CN 1204678A CN 98102760 A CN98102760 A CN 98102760A CN 98102760 A CN98102760 A CN 98102760A CN 1204678 A CN1204678 A CN 1204678A
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- silicon
- wollastonite
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- calcium silicate
- thermal insulation
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Building Environments (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
A heat-insulating refractory calcium silicate material is made up of micro noncrystalline silicon powder, and optional micro crystalline silicon powder and hard rankinite synthesized from calcium materials, as well as wollastonite and/or silicon additive and fibrous material by static method or dynamic method. For the static method the material is shaped before synthesis reaction and only fibrous and wollastonite powder are added. For the dynamic method the material is shaped after synthesis reaction and the fibrous material, wollastonite powder and/or silicon additive are added before shaping.
Description
The present invention relates to a kind of calcium silicate thermal insulation fireproof material and manufacture method thereof, belong to building material technical field.
Existing calcium silicate thermal insulation material has following two kinds of materials:
1, by quartzy, the dynamic synthetic xonotlite of lime hydro-thermal imperfection crystalline phase, though quartz purity height, SiO
2Content is generally more than 95%, but it belongs to crystal form, and active low, the xonotlite production rate is low in the reaction, and there is intermediate product more or less inevitably in the crystallization imperfection, takes off shellfish mullite crystalline phase, and the upper limit temperature of heat tolerance can only reach 1000 ℃;
2, take off shellfish mullite crystalline phase by diatomite, lime hydro-thermal static reaction synthetic, the upper limit temperature of heat tolerance (is seen Japanese JISA9510-1995 " porous inorganic insulating material " and Britain BS3958-82 part 2 " prefabricated calcium silicate products standard " for 650 ℃, though diatomite belongs to non-crystalline material, active higher, but its SiO
2Content is low, has only 60-82%, and impurity is many, Al particularly
2O
3Content is mostly more than 10%, because Al
2O
3A large amount of existence, reaction can only proceed to holder shellfish mullite phase, generates and there is xonotlite, so heat resisting temperature is low.Existing these two kinds of calcium silicate thermal insulation materials all can not satisfy the requirement and the fire protection requirement of buildings fire endurance more than 3 hours of 1000 ℃-1100 ℃ of the heat-insulation and heat-preservations of existing Industrial Stoves.
The objective of the invention is to overcome the deficiencies in the prior art part, produce the heat-insulation and heat-preservation material and the fire-retardant material of buildings fire endurance more than 3 hours that satisfy above-mentioned Industrial Stoves 1000-1100 ℃ position.
In order to achieve the above object, the present invention takes following technical measures:
1, with the non-crystalline silicon micro mist as siliceous raw material, silicon-dioxide flying dust of collecting when this kind non-crystalline silicon micro mist is ferroalloy smelting and smelting desilicated zirconia and the special non-crystalline silicon micro mist of producing (being called for short the silicon ash), rice hull ash, white carbon black etc. any or several, its technical requirements is: SiO
2Content is not less than 88% (best 〉=95%), Al
2O
3Content is less than 3%.For reducing cost, but in the siliceous raw material also admixture be no more than 20% silicon metal micro mist, as silica powder, require SiO
2Content is not less than 95%, and fineness is below the 0.06mm, owing to adopt above-mentioned non-crystalline silicon raw material, the purity height, impurity is few, and is active high, xonotlite production rate height in the reaction, crystallization is perfect, crystal is thick, and crystalline phase is stable, even add≤20% silicon metal micro mist, do not produce holder shellfish mullite phase yet, also little to reactant and material property influence.
2, for improving the high volume stability of material, can add wollastonite in the slip before moulding, the amount that wollastonite is dosed: stationary method is the heavy 0-40% (adding) of blank, dynamic method is the heavy 0-12 (adding) of siccative, wollastonite is that 60-325 purpose powder, wollastonite are a kind of anhydrous silicic acid calcium, stable performance below 1150 ℃, in the present invention, play filling effect with it, to increase the high volume stability of material.
3, for improving the high-temperature behavior of material, can add the siliceous material that adds in the slip before moulding in dynamic method technology, addition is the heavy 0-20% (adding) of siccative, the best is 10-15%, the siliceous material identical with above-mentioned 1 described siliceous material (comprising amorphous silicon and crystalline silicon) that adds.Siliceously add the high-temperature behavior that material can significantly improve material, reduce high-temperature shrinkage, increase hot strength.
Below for the method for making of calcium silicate thermal insulation fireproof material of the present invention:
One, ingredient requirement
1. non-crystalline silicon micro mist is as silicon ash, silica flour, rice hull ash, white carbon black, its SiO
2Content is not less than 88%, Al
2O
3Content is less than 3%.
2. crystallization silica flour such as quartz, SiO
2Content 〉=95%, grinding is to fineness 0.06mm.
3. calcareous material can be a unslaked lime, slaked lime or carbide slag, wherein Al
2O
3, Fe
2O
3Deng foreign matter content and CaCO
3Summation should be less than 5%.
4. wollastonite 60-325 order powder, X-ray diffraction examination is the wollastonite feature.
5. filamentary material, zero twisted yarn, inorganic fibre that heavy water-based is good such as ceramic fiber, natural organic fiber, as fiber crops, cotton, vegetation fiber, length 2-15mm makes to be dispersed in the water.
Two, batching and method for making:
1. static method for making
Silicon powder and milk of lime or lime or carbide slag put into to give add water under agitation CaO and SiO in the compound in the reactor
2Mol ratio C/S is controlled at 0.95-1.05, silicon powder comprises non-crystalline silicon micro mist and silicon metal micro mist, wherein the silicon metal micro mist just adds in order to reduce cost, add-on is controlled at below 20% (weight), Gu be adjusted to water/(weight) ratio=5-10, give temperature of reaction and be controlled at 80-100 ℃, time 1-3 hour, with above-mentioned admixtion dry weight is 100%, take by weighing the wollastonite powder of admixtion dry weight 0-40%, add in the admixtion and stir, Gu regulating pondage makes water/(weight) than keeping 5-10, add fiber, fiber can be aforesaid a kind of or more than a kind of mixture of fiber, add-on is the heavy 2-8% of solid material, and wollastonite and fiber can or give the reaction back before giving reaction and add, and stir, put into mould with holes pressure filtration molding on press, send the wet goods after the moulding to synthesis reactor, logical steam carries out building-up reactions, temperature in the kettle 190-220 ℃, hold-time 12-24 hour, slow cooling, evenly cooling is when treating to be normal pressure in the still, take out goods and put dry kiln drying into, temperature is 100-140 ℃, makes goods water ratio≤5%, carries out go-on-go and packing.
2. dynamic method for making:
Starting material are identical with static method for making, and batching and technology are as follows: with silicon powder and milk of lime or lime or carbide slag, go in synthesis reaction vessel, add water and under agitation mix, also can be pre-mixed the back and drop in the reactor CaO and SiO in the admixtion
2Mol ratio is controlled at 0.95-1.05.The composition of silicon powder, promptly the proportioning of non-crystalline silicon micro mist wherein and silicon metal micro mist is identical with stationary method, slip water in the still/(Gu weight)=12-24, temperature of reaction 190-220 ℃, reaction times 2-8 hour, when heating and building-up reactions, with 80-180 rev/min of stirring, reaction ends, be cooled to blowing below 100 ℃, reaction generates in the material and adds fiber, and wollastonite powder and the siliceous material that adds are respectively 2-8%, 0-12%, 0-20% stirs, added siliceous add material and prepare burden for the first time in used silicon powder composition identical, the synthetic slip with press and mould pressure filtration molding with holes, is delivered to dry kiln with moulded products and is dried to goods water content≤5% for inherent 100-140 ℃, be finished product.
Above dynamic method and stationary method technology respectively have speciality, the every kiln of dynamic method is with short production cycle, but yield poorly, every kiln cycle of stationary method is long, equipment and operator are required height, but every still output height, dynamic method can be added siliceous material and the admixture of adding in synthetic slip, with the physical and chemical performance of improvement and adjustment material, and stationary method can't be added other material after building-up reactions.
The advantage of calcium silicate thermal insulation fireproof material of the present invention is:
1, the present invention adopts non-crystalline silicon material, purity height, impurity few, particularly Al
2O
3Content is low, and is active high, hard Calucium Silicate powder production rate height in the reaction, and crystallization is perfect, and crystal is thick, and crystalline phase is stable, and is even add a certain amount of silicon metal such as quartz in the raw material, also very little to reaction product and material property influence.
2, the slip before the moulding adds wollastonite, and wollastonite is an anhydrous silicic acid calcium, and in stable performance below 1150 ℃, it plays filling effect in calcium silicate thermal insulation fireproof material, can increase the high volume stability of material.
3, adding the siliceous material that adds in the slip before the dynamic method technological forming, promptly is the silicon powder of main raw material of the present invention, can significantly improve the high-temperature behavior of material, reduces high-temperature shrinkage, increases hot strength.
4, the most outstanding advantage of material of the present invention is to burn 16 hours at 1050 ℃, linear shrinkage ratio is less than 2%, flawless and distortion, and it is higher to burn the back folding strength, more than 0.3MPa, reaches far away and surpasses Japanese JISA9510-1995, the requirement of " porous inorganic insulating material ", be the anti-folding 〉=0.3MPa of normal temperature, linear shrinkage ratio≤2.0% behind 1000 ℃ of 3 hours coals, and flawless and distortion.
Following for embodiment, example 1.2 and reference examples 1 are stationary method technology, example 3,4,5,6 and reference examples the 2, the 3rd are used dynamic process.
Test is undertaken by GB10699 " heat-insulating calcium silicate product ", and GB9978 " building slab fire testing method " is carried out in the fire endurance experiment.
Embodiment 1:
Siliceous raw material: wollastonite 80%, silica powder accounts for 20%.
SiO in the silicon ash
2Content 90.6%, Al
2O
3Content 1.3%.SiO in the silica powder
2Content 96.2%, fineness, all by the square hole sieve of 0.06mm, calcareous raw material is the milk of lime that quicklime slaking forms, CaO content 69.3% in the solids.
Take by weighing dried silicon ash 80g respectively, dried silica powder 20g mixes, and adds 300g fresh water, stirs, and takes by weighing 660g milk of lime, mixes with siliceous slip, stirs evenly, and adds water 1140g and stirs evenly.This moment slip in C/S=1.00, Gu water /=9.In the time of 100 ℃, stirred 1 hour 20 minutes, carry out pre-reaction.The paper pulp that adds dry weight 6.6g afterwards, the paper pulp add-on is 3%, stirs evenly, and is pressed into flat board (design volume density 320kg/m
3), the synthesis reactor internal reaction of 210 ℃-215 ℃ saturation steams 20 hours, slowly oven dry was taken out in evenly cooling 12 hours, and the gained material property sees Table 1.
Embodiment 2:
Siliceous raw material: pure silicon ash.
Silicon ash and milk of lime proportioning and technology are with embodiment 1, but interpolation wollastonite before the moulding, addition is 34%, the gained material property sees Table 1.
Reference examples 1.
Silicon ash in the siliceous raw material, quartz half and half, and add 20% wollastonite, and silicon ash, silica powder, milk of lime, paper pulp is with embodiment 1.Dried silicon ash 50g, silica powder 50g, milk of lime 670g, wollastonite 44g.Manufacturing step is with embodiment 1,2, and the gained material property sees Table 1.
It more than is static craft embodiment.Among the embodiment 1, siliceous raw material is: non-crystalline silicon 80%, silicon metal 20%; Among the embodiment 2, siliceous raw material is a pure amorphous silicon, and adds 34% wollastonite.Two embodiment expect material property requirement according to the invention from former.Siliceous raw material is with the silicon metal of 50% non-crystalline silicon 50% in the reference examples 1, though add 20% wollastonite, but because siliceous raw material does not meet requirement of the present invention, after 1000 ℃ of 16 hours burnings of material, the folding strength loss is very big, and 1050 ℃ of 16 hours burning back linear shrinkage ratios reach 2.6% requirement that does not meet below 2.0%.
It below is the dynamic method craft embodiment.
Embodiment 3:
Siliceous material: pure silicon ash
The silicon ash is identical with embodiment 1 with calcareous raw material.
Take by weighing the dried silicon ash of 100g, join in the 1000g fresh water and stir.Take by weighing the milk of lime of 681g, mix, stir with silicon ash slip.Take by weighing 2700g water again and add, stir.This moment slip C/S=1.00, Gu water/(weight)=19.Slip is injected the synthesis reactor that has stirring, when being heated to 205 ℃-212 ℃, stirring reaction 6h, 150 rev/mins of mixing speed.Slip is taken out in the cooling back, adds the dispersion cotton fibre of dry weight 8.3g, stirs evenly, and is pressed into flat board (design volume density 230kg/m
3), oven dry, material property sees Table 1.
Reference examples 2:
Siliceous raw material: pure silica powder (prior art)
Silica powder and milk of lime are identical with embodiment 1, silica powder 98g, and milk of lime 681g, other is identical with embodiment 3, and material property sees Table 1.
Embodiment 3 is corresponding with reference examples 2, and embodiment 3 is manufacture method of the present invention, reference examples 2 is prior aries to siliceous raw material with pure amorphous silicon 1, and siliceous material is pure quartz, and the two has obvious difference as can be seen from Table 1.
Embodiment 4:
Siliceous raw material: the silicon ash accounts for 80%, silica powder accounts for 20%, and synthetic material adds 15% silica powder.
Silicon ash, silica powder, milk of lime are identical with embodiment 1.
Silicon ash 80g, silica powder 20g add water and stir, and add milk of lime 683g, and this moment, slip C/S=1.00 made water /=14 Gu add water.Synthesis technique is identical with embodiment 3.Synthetic material adds the siliceous material silica powder (admixture 15%) that adds of 33g.The gained material property sees Table 1.
Reference examples 3:
Siliceous raw material silica powder, synthetic material adds the silicon ash.
Raw material is with synthetic identical with reference examples 2.Synthetic material adds silicon ash 33g (the silica flour addition is 15%) as the siliceous material that adds.Product properties sees Table 1.
Embodiment 4 is corresponding with reference examples 3, and 80% is non-crystalline silicon in the siliceous raw material of embodiment 4, the 20%th, and silicon metal, synthetic material adds 15% the siliceous material silica powder that adds of crystallization, requirement according to the invention.The siliceous raw material of reference examples 3 is pure silicon metal, quartz, and synthetic material has added 15% the siliceous material silicon ash that adds of amorphous, is the improvement of prior art (reference examples 2), but does not reach the requirement of invention.The two has tangible difference as can be seen from Table 1.
Embodiment 5 (most preferred embodiment)
Siliceous raw material is the silicon ash, and synthetic material adds silicon ash and wollastonite.
The used silicon of raw material is grey and interpolation is used silicon ash and milk of lime are identical with embodiment 1, and wollastonite is identical with embodiment 2.
Take by weighing the milk of lime of 100g silicon ash and 664g respectively, be operated to synthetic by the requirement of embodiment 3.Add the mixture of paper pulp, fiber and the ceramic fiber of dry weight 10g in synthetic material, the fiber add-on is 4.5%, adds dried silicon ash of 26g water dispersive and 13g wollastonite, and the addition of silicon ash and wollastonite is respectively 12% and 6%.Be pressed into density 250kg/m respectively
3And 400kg/m
3Flat board, oven dry back material property sees Table 1 and table 2 respectively.
Table 1 is pressed the result of the method test of GB10699 " heat-insulating calcium silicate product " regulation as lagging material.
| Project | Density kg/m 3 | The anti-folding of normal temperature MPa | After 1000 ℃ * 16h burns | After 1050 ℃ * 16h burns | Press linear shrinkage ratio and judge＜2.0% | ||
| Linear shrinkage ratio % | Anti-disconnected Pa | Linear shrinkage % | Anti-folding MPa | ||||
| Embodiment 1 | ????317 | ????0.86 | ????0.86 | ????0.54 | ????1.61 | ????0.38 | Qualified |
| Embodiment 2 | ????226 | ????0.70 | ????0.78 | ????0.48 | ????1.13 | ????0.42 | Qualified |
| Reference examples 1 | ????331 | ????0.65 | ????1.74 | ????0.18 | ????2.68 | ????0.28 | Defective |
| Embodiment 3 | ????232 | ????0.60 | ????0.88 | ????0.40 | ????1.70 | ????0.35 | Qualified |
| Reference examples 2 | ????236 | ????0.51 | ????1.87 | ????0.22 | ????4.16 | ????0.13 | Defective |
| Embodiment 4 | ????237 | ????0.59 | ????1.38 | ????0.52 | ????1.84 | ????0.57 | Qualified |
| Reference examples 3 | ????228 | ????0.48 | ????1.82 | ????0.33 | ????3.41 | ????0.26 | Defective |
| Embodiment 5 | ????254 | ????0.78 | ????0.74 | ????0.72 | ????0.97 | ????0.83 | Qualified |
Table 2 is used as the result of Building Fire Protection material by GB10699 and GB9978 " building slab fire testing method " test.
| Project | Density kg/m 3 | The anti-folding of normal temperature MPa | After 1060 ℃ * 3h burns | Fire endurance min | |||
| Linear shrinkage % | Anti-folding MPa | 20mm is thick | 25mm is thick | 30mm is thick | |||
| Embodiment 5 | 407 | 1.93 | 1.18 | 1.90 | 1.80 | 210 | 240 |
Embodiment 5 is most preferred embodiments, and siliceous raw material is used non-crystalline silicon (silicon ash) synthetic material to add the suitable wollastonite (6%) of quantity entirely and siliceously added the various performances of material (silicon ash 12%) particularly high-temperature behavior is best, sees Table 1.
Claims (8)
- Claims1. calcium silicate thermal insulation fireproof material is characterized in that its mineral composition is an xonotlite or based on xonotlite, and wollastonite and/or siliceous to add material be auxilliary is mixed with the molding of the fiber of 2-8% as strongthener.
- 2. calcium silicate thermal insulation fireproof material according to claim 1, the main mine phase xonotlite that it is characterized in that described molding is by containing SiO 2Non-crystalline silicon micro mist more than 88%, the crystallization silica flour that adds 0-20% is synthetic with the calcareous material that contains the calcination base more than the CaO95%, and its mol ratio is C/S=0.95-1.05.
- 3. according to claim 1 and 2 described calcium silicate thermal insulation fireproof materials, the add-on that it is characterized in that described wollastonite is 0-40%.
- 4. calcium silicate thermal insulation fireproof material according to claim 3 is characterized in that in the described synthetic slip that is added with wollastonite, also can add the siliceous material 0-20% that adds.
- 5. the stationary method manufacturing process of a calcium silicate thermal insulation fireproof material as claimed in claim 1 is characterized in that: one, starting material: 1. non-crystalline silicon micro mist, and as silicon ash, rice hull ash, white carbon black, SiO 2Content is not less than 88%, Al 2O 3Content is less than 3%.2. crystallization silica flour such as quartz, SiO 2Content 〉=95% is below the fineness 0.06mm.3. calcareous material: can be unslaked lime, slaked lime or carbide slag, SiO 2, Al 2O 3, Fe 2O 3Deng foreign matter content and CaCO 3The content summation should be less than 5%.4. wollastonite: 40-325 order powder.5. filamentary material, inorganic fibre such as ceramic fiber that non-twist immersion is good, natural organic fiber as fiber crops, cotton, vegetation fiber, length 2-15mm, makes to be dispersed in the water.Two, batching and manufacture method silicon powder and milk of lime or lime or carbide slag are put into and are given in the reactor, mix CaO and SiO in the batching 2Mol ratio C/S is controlled at 0.95-1.05, Gu be transferred to water/(weight) ratio=5-10, give temperature of reaction 80-100 ℃, time 1-3 hour, with above-mentioned admixtion dry weight is 100%, takes by weighing the wollastonite powder of 0-40%, adds in the admixtion, stir evenly, regulating pondage Gu make water/(weight) than keeping 5-10, adds the fiber of the heavy 2-8% of above-mentioned solid materials, stir, with above-mentioned slip on press with mould pressure filtration molding with holes, with the goods of moulding synthesis reactor into, logical steam makes temperature in the kettle remain on 190 ℃-220 ℃, kept 12-24 hour, slow cooling, evenly cooling is when treating to be normal pressure in the still, take out goods and put dry kiln drying into, bake out temperature 100-140 ℃, make goods water ratio≤5%.
- 6. the dynamic method for making of a heat-insulating fire-proofing material as claimed in claim 1, it is characterized in that: one, raw material is identical with stationary method; Two, batching and method for making are as follows; With silicon powder and milk of lime or lime or carbide slag, put into and add in the synthesis reaction vessel that water stirs and mix and drop into synthesis reaction vessel again, CaO and SiO in the admixtion after also can giving mixing earlier 2Mol ratio C/S is at 0.95-1.05, slip water in the still/(Gu weight)=12-24, temperature of reaction 190-220 ℃, reaction times 2-8 hour, reaction process is with 80-180 rev/min of stirring, reaction ends, be cooled to blowing below 100 ℃, reaction generates the fiber that adds the heavy 2-8% of solid in the material, the siliceous material that adds of the wollastonite of 0-12% and 0-20%, stir, this slip with press and mould pressure filtration molding with holes, is delivered to dry kiln with moulded products and is dried to goods water content≤5% at 100-140 ℃.
- 7. according to the manufacture method of claim 5 and 6 described calcium silicate thermal insulation fireproof materials, it is characterized in that comprising in the described silicon powder non-crystalline silicon micro mist and silicon metal micro mist, silicon metal micro mist add-on wherein is 0-20% (weight).
- 8. according to the dynamic method for making of the calcium silicate thermal insulation fireproof material described in the claim 6, it is characterized in that the described siliceous material that adds, can be the described non-crystalline silicon micro mist of claim 5, also can be the described silicon metal micro mist of claim 5, or the mixture of the two arbitrary proportion.
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| CN1043220C (en) * | 1995-03-13 | 1999-05-05 | 北京科技大学 | method for production of high-temp. resistant calcium-silicate thermal insulation material |
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1998
- 1998-07-03 CN CN98102760A patent/CN1086408C/en not_active Expired - Fee Related
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