CN101768003A - High-performance silicon carbide composite kiln furniture material and preparation method thereof - Google Patents

High-performance silicon carbide composite kiln furniture material and preparation method thereof Download PDF

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Publication number
CN101768003A
CN101768003A CN200910312611A CN200910312611A CN101768003A CN 101768003 A CN101768003 A CN 101768003A CN 200910312611 A CN200910312611 A CN 200910312611A CN 200910312611 A CN200910312611 A CN 200910312611A CN 101768003 A CN101768003 A CN 101768003A
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China
Prior art keywords
silicon carbide
carbide composite
kiln furniture
performance silicon
composite kiln
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CN200910312611A
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CN101768003B (en
Inventor
黄朝晖
郑宝乡
刘艳改
房明浩
郑春和
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Fuzhou Yuancheng Fire-Resistant Materials & Grinding Wheels Co Ltd
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Fuzhou Yuancheng Fire-Resistant Materials & Grinding Wheels Co Ltd
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Publication of CN101768003A publication Critical patent/CN101768003A/en
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Abstract

The invention provides a high-performance silicon carbide composite kiln furniture material and a preparation method thereof, belonging to the technical field of refractory material. In the invention, silicon carbide and additives are taken as the main raw materials; a series of processes including mixing, ageing mixture, drying, and molding, sintering and testing are carried out to prepare high-performance silicon carbide composite kiln furniture. The kiln furniture refractory material in the invention has the performances of high-temperature resistance, small deformation, oxidation resistance, low hot expansion coefficient, high strength, high thermal shock stability and the like.

Description

A kind of high-performance silicon carbide composite kiln furniture material and preparation method thereof
Technical field
A kind of high-performance silicon carbide composite kiln furniture material that the present invention relates to and preparation method thereof belongs to technical field of refractory materials.
Background technology
The kiln furnitures production of China's ceramic industry has a long history; act on and be used to support, protect the fire resistive material product of being fired product in the ceramic product firing process; the quality of its performance quality is directly connected to the ceramic product that will fire; and to firing cost considerable influence is arranged also, so the quality of kiln furnitures is most important.
Kiln furnitures are the special-shaped refractory materialss that are used to support, protect product in the firing process, and Products Quality and energy consumption are had extremely important influence.Corresponding existing kiln furnitures are poor owing to thermal shock resistance, the volume instability, and work-ing life is short, and result of use is poor, generally recycles just cracking damage of back through 2030 kilns, causes porcelain problems such as distortion, the slag that falls to occur.China because the use properties of kiln furnitures is lower, has seriously restricted the development of China's ceramics at present as the big producing country of ceramic.
Present kiln furniture material mainly contains materials such as silicon carbide, trichroite, trichroite mullite, mullite, mullite corundum, fused quartz, aluminium titanates, aluminium titanates mullite, and research and use wherein siliceous with carbonization and cordierite kiln ware are the most extensive.According to the use temperature classification, fused quartz, trichroite, trichroite mullite, recrystallized silicon carbide (crossbeam) can be used as low temperature (less than 1200 ℃) kiln furnitures material; Recrystallized silicon carbide (crossbeam refractory slab), aluminium titanates, mullite corundum etc. can be used as middle temperature (1200 to 1400 ℃) kiln furnitures material; Recrystallized silicon carbide, corundum, zirconium white, spinel etc. can be used as high temperature (1400 to 1700 ℃) kiln furnitures material.
Silicon carbide has high-temperature stability, high mechanical strength and thermal conductivity, less thermal expansivity, makes it have fabulous hot strength and heat-shock resistance, and silicon carbide is the ideal high-temperature structural material.Make the sintering kiln of ceramic with it, occur distortion hardly, ftracture and fall to consider to be worth doing phenomenon.But because silicon carbide is the compound of covalent bonds, is difficult to the normal pressure-sintered method of simple employing and produces high dense material, must adopt some special process means or rely on the second phase material to promote its sintering.Silicon carbide kiln furniture has different classification according to the difference of wedding agent, comprising: clay combination, oxide-bonded, silicon nitride bonded silicon and recrystallization.For the clay-carborundum kiln furnitures, this kiln furnitures production technique is simple, and price also is minimum in the various silicon carbide kiln furnitures, and the employed silicon carbide refractory slab of many domestic ceramics factories and electroceramics factory, saggar and backing plate are exactly this class material.Because clay generates a small amount of liquid phase when sintering, the physical strength of material raises with temperature and reduces.Therefore, clay bonded silicon carbide kiln furniture work-ing life and use temperature all are restricted.Though have excellent performance for silicon nitride combined silicon carbide and recrystallized silicon carbide goods, its production technology is complicated, the equipment requirements height, and investment is big, and the production cost costliness is restricted in the marketing process.
Summary of the invention
The purpose of this invention is to provide a kind of high-performance silicon carbide composite kiln furniture and preparation method thereof, silicon nitride combined silicon carbide and recrystallized silicon carbide production of articles technology are complicated in the solution prior art, the equipment requirements height, investment is big, the production cost costliness, problem such as in the marketing process, be restricted, the preparation method of composition of raw materials of the present invention is scientific and reasonable, and the high-performance silicon carbide composite kiln furniture material that obtains is high temperature resistant, distortion is little, intensity is high, resistance of oxidation is strong, neat appearance, work-ing life significantly improve; The preparation method of novel silicon carbide composite kiln furniture has production technology and better controls, and production cost is lower, and use properties is good, believes that the industry at high temperature kiln has good market outlook.
High-performance silicon carbide composite kiln furniture (SiC-Si of the present invention 2ON 2Or Si 3N 4-Al 2TiO 5Composite kiln furniture): described SiC-Si 2ON 2Or Si 3N 4-Al 2TiO 5The used main raw material of composite kiln furniture comprises SiC, Si 2ON 2Or Si 3N 4, Al 2TiO 5With the normal temperature wedding agent.
Remarkable advantage of the present invention is: the present invention has prepared high-performance SiC-Si with the control and the high-temp in-situ reaction sintering of raw material by the component proportion design 2ON 2Or Si 3N 4-Al 2TiO 5Composite kiln furniture material, the composite material concurrent Al for preparing 2TiO 5Anti-oxidant, the Si of low thermal expansivity 2ON 2(or Si 3N 4) performance such as the flue gas oxidation corrosion of high strength high temperature resistance and the high thermal shock resistance of SiC, the SiC particle plays the effect of skeleton in material, make SiC-Si 2ON 2Or Si 3N 4-Al 2TiO 5Composite kiln furniture material is high temperature resistant, distortion is little, intensity is high, resistance of oxidation is strong, neat appearance, and significantly improve work-ing life.
Embodiment
Raw material is according to mass percent: SiC 80-98wt%; Al 2TiO 50.1-10wt%, Si 2ON 2Or Si 3N 40.1-10wt%; Normal temperature wedding agent 0.15-3wt%.
Above-mentioned normal temperature wedding agent can be in dextrin, methylcellulose gum or the PVAC polyvinylalcohol a kind of.
Used SiC can be that granularity is that 6-90 purpose particle and granularity are the mixing of 150-320 purpose fine powder in the raw material, used Si 2ON 2Or Si 3N 4, and Al 2TiO 5Be the micro mist of granularity less than 10 μ m.
The preparation method may further comprise the steps:
(1) batch mixing: all raw materials are put into the mixer uniform mixing by described proportioning raw materials;
(2) ageing mixture: the material that step (1) is mixed left standstill under air-tight state 12-36 hour;
(3) moulding: the material that step (2) is left standstill, according to inserting corresponding die for molding behind the required material metage of different kiln furnitures; During moulding mould is carried out double-face vibration pressurization, the utmost point power of shaking is 200-350KN, time of vibration 1-30 second;
(4) oven dry: with the blank after step (3) moulding under 80-120 ℃ of condition, dry to water content less than 1%;
(5) burn till: sinter molding under 1300-1650 ℃ of condition obtains described complex phase high-temperature resistant kiln furnitures.
(6) detect: the composite kiln furniture that described step (5) is burnt till detects by technical requirements, is finished product after the packing.
Below be several embodiments of the present invention, further specify the present invention, but the present invention is not limited only to this.
Embodiment 1
The production process of kiln furnitures is:
(1) batch mixing: according to the above ratio raw material is put into the mixer uniform mixing; As dispose the material of 1000Kg, the weight of each material is as follows:
SiC 900Kg, Si 2ON 2And Al 2TiO 5Reach total amount 98Kg by 1: 1 mixed, normal temperature wedding agent 2Kg.Among the wherein above-mentioned 900Kg SiC, be 20 purpose SiC particle 500Kg by granularity, granularity is 200 purpose SiC fine powder 400Kg, the Si of above-mentioned 98Kg 2ON 2And Al 2TiO 5Be the micro mist of 7 μ m, above-mentioned normal temperature wedding agent is a dextrin.
(2) ageing mixture: the above-mentioned material that mixes was left standstill under air-tight state 24 hours;
(3) moulding: with the material for preparing, according to inserting corresponding die for molding behind the required material metage of different kiln furnitures; During moulding mould is carried out the double-face vibration pressurization, the utmost point power of shaking is 200-350KN, time of vibration 8 seconds;
(4) oven dry: with the blank after the above-mentioned moulding under 100 ℃ of conditions, dry to water content less than 1%;
(5) burn till: sinter molding under 1450 ℃ of conditions;
(6) detect: detect by technical requirements, be finished product after the packing.
The main performance index of resulting product is as follows:
Volume density: 2.68g/cm 3Strength at normal temperature is greater than 40MPa; Void content is less than 12%; Temperature conservation rate of heat-shock resistance experiment water-cooled is greater than 80%.
Embodiment 2
The production process of kiln furnitures is:
(1) batch mixing: according to the above ratio raw material is put into the mixer uniform mixing; As dispose the material of 1000Kg, the weight of each material is as follows:
SiC 850Kg, Si 3N 4And Al 2TiO 5Reach total amount 148Kg by 1: 1 mixed, normal temperature wedding agent 2Kg.Among the wherein above-mentioned 850Kg SiC, be 20 purpose SiC particle 500Kg by granularity, granularity is 200 purpose SiC fine powder 350Kg, the Si of above-mentioned 148Kg 3N 4And Al 2TiO 5It is the micro mist of 7 μ m.Above-mentioned normal temperature wedding agent is that concentration is 10% PVAC polyvinylalcohol solution.
(2) ageing mixture: the above-mentioned material that mixes was left standstill under air-tight state 24 hours;
(3) moulding: with the material for preparing, according to inserting corresponding die for molding behind the required material metage of different kiln furnitures; During moulding mould is carried out the double-face vibration pressurization, the utmost point power of shaking is 200-350KN, time of vibration 12 seconds;
(4) oven dry: with the blank after the above-mentioned moulding under 100 ℃ of conditions, dry to water content less than 1%;
(5) burn till: sinter molding under 1500 ℃ of conditions;
(6) detect: detect by technical requirements, be finished product after the packing.
The main performance index of resulting product is as follows:
Volume density: 2.69g/cm 3Strength at normal temperature is greater than 42MPa; Void content is less than 11%; Temperature conservation rate of heat-shock resistance experiment water-cooled is greater than 85%.
Embodiment 3
The production process of kiln furnitures is:
(1) batch mixing: according to the above ratio raw material is put into the mixer uniform mixing; As dispose the material of 1000Kg, the weight of each material is as follows:
SiC 870Kg, Si 2ON 2And Al 2TiO 5Reach total amount 128Kg by 1: 1 mixed, normal temperature wedding agent 2Kg.Among the wherein above-mentioned 870Kg SiC, be 20 purpose SiC particle 500Kg by granularity, granularity is 200 purpose SiC fine powder 370Kg, the Si of above-mentioned 128Kg 2ON 2And Al 2TiO 5It is the micro mist of 7 μ m.Above-mentioned normal temperature wedding agent is that concentration is 8% methocel solution.
(2) ageing mixture: the above-mentioned material that mixes was left standstill under air-tight state 24 hours;
(3) moulding: with the material for preparing, according to inserting corresponding die for molding behind the required material metage of different kiln furnitures; During moulding mould is carried out the double-face vibration pressurization, the utmost point power of shaking is 200-350KN, time of vibration 18 seconds;
(4) oven dry: with the blank after the above-mentioned moulding under 100 ℃ of conditions, dry to water content less than 1%;
(5) burn till: sinter molding under 1600 ℃ of conditions;
(6) detect: detect by technical requirements, be finished product after the packing.
The main performance index of resulting product is as follows:
Volume density: 2.70g/cm 3Strength at normal temperature is greater than 45MPa; Void content is less than 10%; Temperature conservation rate of heat-shock resistance experiment water-cooled is greater than 90%.

Claims (6)

1. high-performance silicon carbide composite kiln furniture, it is characterized in that: the used main raw material of described high-performance silicon carbide composite kiln furniture comprises SiC, Si 2ON 2Or Si 3N 4, Al 2TiO 5With the normal temperature wedding agent.
2. high-performance silicon carbide composite kiln furniture according to claim 1 is characterized in that: the used raw material of described high-performance silicon carbide composite kiln furniture is according to mass percent: SiC 80-98wt%; Al 2TiO 50.1-10wt%, Si 2ON 2Or Si 3N 40.1-10wt%; Normal temperature wedding agent 0.15-3wt%.
3. high-performance silicon carbide composite kiln furniture according to claim 2 is characterized in that: described normal temperature wedding agent is a kind of in dextrin, methylcellulose gum or the PVAC polyvinylalcohol.
4. high-performance silicon carbide composite kiln furniture according to claim 2 is characterized in that: used SiC is that granularity is that 6-90 purpose particle and granularity are the mixing of 150-320 purpose fine powder in the described raw material, used Si 2ON 2Or Si 3N 4, and Al 2TiO 5Be the micro mist of granularity less than 10 μ m.
5. preparation method as claim 1,2,3 or 4 described high-performance silicon carbide composite kiln furnitures, it is characterized in that: described preparation method may further comprise the steps:
Batch mixing: all raw materials are put into the mixer uniform mixing by described proportioning raw materials;
Ageing mixture: the material that step (1) is mixed left standstill under air-tight state 12-36 hour;
Moulding: the material that step (2) is left standstill, according to inserting corresponding die for molding behind the required material metage of different kiln furnitures; During moulding mould is carried out double-face vibration pressurization, the utmost point power of shaking is 200-350KN, time of vibration 1-30 second;
The oven dry: with the blank after step (3) moulding under 80-120 ℃ of condition, dry to water content less than 1%;
Burn till: sinter molding under 1300-1650 ℃ of condition obtains described high-performance silicon carbide composite kiln furniture.
6. the preparation method of high-performance silicon carbide composite kiln furniture according to claim 5, it is characterized in that: the high-performance silicon carbide composite kiln furniture that described step (5) is burnt till detects by technical requirements, is finished product after the packing.
CN 200910312611 2009-12-30 2009-12-30 High-performance silicon carbide composite kiln furniture material and preparation method thereof Expired - Fee Related CN101768003B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106083118A (en) * 2016-06-13 2016-11-09 孟红琳 A kind of kiln composite block insulation material of silicon nitride combined silicon carbide and preparation method thereof
CN107324821A (en) * 2017-07-12 2017-11-07 瑞泰科技股份有限公司 It is a kind of that there is high-absorbility, the CFB boiler water-cooling wall carborundum wear-resistant castable of high heat conductance
CN107324809A (en) * 2017-07-11 2017-11-07 深圳市商德先进陶瓷股份有限公司 Porous silicon carbide ceramic and its preparation method and application
CN108083820A (en) * 2017-12-08 2018-05-29 湖南仁龙特种陶瓷有限公司 Energy saving kiln furniture material and the preparation method of energy saving kiln furnitures is prepared using it
CN108558415A (en) * 2017-12-08 2018-09-21 湖南仁龙特种陶瓷有限公司 Energy saving kiln furnitures and preparation method thereof
CN109320208A (en) * 2018-12-12 2019-02-12 怀化学院 Damaged ceramic crucible reuse method and its ceramic crucible of preparation
CN116041068A (en) * 2023-03-07 2023-05-02 宜兴金君耐火炉料有限公司 Antioxidant silicon oxynitride combined silicon carbide brick for low-oxygen copper rod smelting furnace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6299828B1 (en) * 1997-06-26 2001-10-09 C. Edward Eckert Shaft design for fluxing molten metal
CN100383085C (en) * 2006-03-10 2008-04-23 宁夏协成冶金制品有限公司 Silicon carbide kiln furniture and its preparing process

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106083118A (en) * 2016-06-13 2016-11-09 孟红琳 A kind of kiln composite block insulation material of silicon nitride combined silicon carbide and preparation method thereof
CN107324809A (en) * 2017-07-11 2017-11-07 深圳市商德先进陶瓷股份有限公司 Porous silicon carbide ceramic and its preparation method and application
CN107324821A (en) * 2017-07-12 2017-11-07 瑞泰科技股份有限公司 It is a kind of that there is high-absorbility, the CFB boiler water-cooling wall carborundum wear-resistant castable of high heat conductance
CN107324821B (en) * 2017-07-12 2020-06-09 瑞泰科技股份有限公司 Silicon carbide wear-resistant castable with high absorption rate and high heat conductivity for CFB boiler water wall
CN108083820A (en) * 2017-12-08 2018-05-29 湖南仁龙特种陶瓷有限公司 Energy saving kiln furniture material and the preparation method of energy saving kiln furnitures is prepared using it
CN108558415A (en) * 2017-12-08 2018-09-21 湖南仁龙特种陶瓷有限公司 Energy saving kiln furnitures and preparation method thereof
CN109320208A (en) * 2018-12-12 2019-02-12 怀化学院 Damaged ceramic crucible reuse method and its ceramic crucible of preparation
CN116041068A (en) * 2023-03-07 2023-05-02 宜兴金君耐火炉料有限公司 Antioxidant silicon oxynitride combined silicon carbide brick for low-oxygen copper rod smelting furnace
CN116041068B (en) * 2023-03-07 2023-12-08 宜兴金君耐火炉料有限公司 Antioxidant silicon oxynitride combined silicon carbide brick for low-oxygen copper rod smelting furnace

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