CN104311138A - Preparation method of silicon nitride and silicon carbide combined titanium diboride foamed ceramics - Google Patents
Preparation method of silicon nitride and silicon carbide combined titanium diboride foamed ceramics Download PDFInfo
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- CN104311138A CN104311138A CN201410563222.4A CN201410563222A CN104311138A CN 104311138 A CN104311138 A CN 104311138A CN 201410563222 A CN201410563222 A CN 201410563222A CN 104311138 A CN104311138 A CN 104311138A
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- silicon nitride
- silicon carbide
- silicon
- foamed ceramics
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Abstract
The invention relates to a preparation method of silicon nitride and silicon carbide combined titanium diboride foamed caramics. The preparation method is characterized by comprising the following steps: uniformly mixing TiB2, silica powder, phenolic resin and a hydroxypropyl methyl cellulose to form a ceramic slurry, soaking the ceramic slurry on polyurethane foam, drying the ceramic slurry on the polyurethane, and sintering the ceramic slurry on the polyurethane in the nitrogen atmosphere to form the silicon nitride and silicon carbide combined titanium diboride foamed camics. The prepared silicon nitride and silicon carbide combined titanium diboride foamed ceramics are uniform in micro structure, high in strength, uniform in pores, capable of avoiding the residue of carbon and free silicon, and the strength, high temperature resistance and hot impact resistance can be greatly improved.
Description
Technical field
The present invention relates to a kind of silicon nitride, silicon carbide in conjunction with TiB2 foamed ceramics, belong to porous ceramics preparing technical field.
Background technology
Silicon nitride, silicon carbide are a kind of low bulk, corrosion-resistant, high strength, resistant to elevated temperatures structural ceramic material in conjunction with titanium diboride composite ceramic.Silicon nitride, silicon carbide are applied to the industries such as the steel casting of large special steel casting mainly as molten steel filtering element in conjunction with TiB2 foamed ceramics.The problems such as the Alumina Foam Ceramics of current use, TiB2 foamed ceramics ubiquity use temperature is low, thermal shock resistance is poor, cannot meet the needs of large special steel casting continuous casting.
Summary of the invention
The object of the present invention is to provide a kind of silicon nitride, silicon carbide in conjunction with the preparation method of TiB2 foamed ceramics, its technical scheme is:
Silicon nitride, silicon carbide in conjunction with a preparation method for TiB2 foamed ceramics, by TiB
2, silicon powder, resol be the ratio of 40 ~ 88:10 ~ 40:2 ~ 20 and concentration with weight ratio is that 0.1 ~ 0.3wt% Gonak, 40 ~ 60wt% Homogeneous phase mixing makes ceramic size, then ceramic size is immersed in polyurethane foam, after drying in nitrogen atmosphere, be 300 DEG C ~ 1450 DEG C in temperature and slowly heat up 20 ~ 100 hours, 1450 DEG C of insulations 5 ~ 10 hours, be then that 1700 ~ 1750 DEG C of insulations make silicon nitride, silicon carbide for 20 ~ 120 minutes in conjunction with TiB2 foamed ceramics in vacuum or argon gas atmosphere, temperature.
Compared with prior art, its advantage is in the present invention:
1, the present invention prepare silicon nitride, silicon carbide in conjunction with TiB2 foamed ceramics uniform microstructure, intensity is high, and hole size is even;
2, the charcoal formed after resol, polyurethane foam and the Vltra tears charing that the present invention adopts and silica flour complete reaction form silicon carbide, avoid the residual of charcoal, and remaining silica flour at high temperature reacts with nitrogen and generates silicon nitride by TiB2 and combine, newly-generated silicon nitride, silicon carbide make silicon nitride, silicon carbide in conjunction with TiB2 foamed ceramics in conjunction with TiB2, avoid free remaining, silicon makes its intensity increase substantially;
3, this silicon nitride, silicon carbide are lightweight, high temperature resistant in conjunction with TiB2 foamed ceramics, thermal shock resistance is excellent.
Embodiment
embodiment 1
By TiB
2, silicon powder, resol take weight ratio as the ratio of 40:40:20 and concentration for 0.1wt% Gonak 40wt% Homogeneous phase mixing makes ceramic size, then ceramic size is immersed in polyurethane foam, after drying in nitrogen atmosphere, be 300 DEG C ~ 1450 DEG C in temperature and slowly heat up 20 hours, 1450 DEG C of insulations 5 hours, be then that 1700 DEG C of insulations make silicon nitride, silicon carbide for 20 minutes in conjunction with TiB2 foamed ceramics in vacuum or argon gas atmosphere, temperature.
The purity of testing proportion material used is technical pure.
embodiment 2
By TiB
2, silicon powder, resol take weight ratio as the ratio of 60:25:15 and concentration for 0.2wt% Gonak 50wt% Homogeneous phase mixing makes ceramic size, then ceramic size is immersed in polyurethane foam, after drying in nitrogen atmosphere, be 300 DEG C ~ 1450 DEG C in temperature and slowly heat up 60 hours, 1450 DEG C of insulations 8 hours, be then that 1730 DEG C of insulations make silicon nitride, silicon carbide for 70 minutes in conjunction with TiB2 foamed ceramics in vacuum or argon gas atmosphere, temperature.
The purity of testing proportion material used is technical pure.
embodiment 3
By TiB
2, silicon powder, resol take weight ratio as the ratio of 88:10:2 and concentration for 0.3wt% Gonak 60wt% Homogeneous phase mixing makes ceramic size, then ceramic size is immersed in polyurethane foam, after drying in nitrogen atmosphere, be 300 DEG C ~ 1450 DEG C in temperature and slowly heat up 100 hours, 1450 DEG C of insulations 10 hours, be then that 1750 DEG C of insulations make silicon nitride, silicon carbide for 120 minutes in conjunction with TiB2 foamed ceramics in vacuum or argon gas atmosphere, temperature.
The purity of testing proportion material used is technical pure.
Claims (1)
1. silicon nitride, silicon carbide are in conjunction with a preparation method for TiB2 foamed ceramics, it is characterized in that: by TiB
2, silicon powder, resol be the ratio of 40 ~ 88:10 ~ 40:2 ~ 20 and concentration with weight ratio is that 0.1 ~ 0.3wt% Gonak, 40 ~ 60wt% Homogeneous phase mixing makes ceramic size, then ceramic size is immersed in polyurethane foam, after drying in nitrogen atmosphere, be 300 DEG C ~ 1450 DEG C in temperature and slowly heat up 20 ~ 100 hours, 1450 DEG C of insulations 5 ~ 10 hours, be then that 1700 ~ 1750 DEG C of insulations make silicon nitride, silicon carbide for 20 ~ 120 minutes in conjunction with TiB2 foamed ceramics in vacuum or argon gas atmosphere, temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410563222.4A CN104311138B (en) | 2014-10-22 | 2014-10-22 | A kind of silicon nitride, silicon carbide are in conjunction with the preparation method of TiB2 foamed ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410563222.4A CN104311138B (en) | 2014-10-22 | 2014-10-22 | A kind of silicon nitride, silicon carbide are in conjunction with the preparation method of TiB2 foamed ceramics |
Publications (2)
| Publication Number | Publication Date |
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| CN104311138A true CN104311138A (en) | 2015-01-28 |
| CN104311138B CN104311138B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410563222.4A Expired - Fee Related CN104311138B (en) | 2014-10-22 | 2014-10-22 | A kind of silicon nitride, silicon carbide are in conjunction with the preparation method of TiB2 foamed ceramics |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223272A (en) * | 1983-05-30 | 1984-12-15 | 株式会社日立製作所 | Ceramics structure and manufacture |
| CN101708402A (en) * | 2009-12-24 | 2010-05-19 | 中钢集团洛阳耐火材料研究院有限公司 | Multiphase nitride combined silicon carbide ceramic foam filter and preparation method thereof |
| CN103641484A (en) * | 2013-12-16 | 2014-03-19 | 武汉科技大学 | Method for preparing Si3N4/SiC composite ceramic powder from biomass power plant ash |
-
2014
- 2014-10-22 CN CN201410563222.4A patent/CN104311138B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223272A (en) * | 1983-05-30 | 1984-12-15 | 株式会社日立製作所 | Ceramics structure and manufacture |
| CN101708402A (en) * | 2009-12-24 | 2010-05-19 | 中钢集团洛阳耐火材料研究院有限公司 | Multiphase nitride combined silicon carbide ceramic foam filter and preparation method thereof |
| CN103641484A (en) * | 2013-12-16 | 2014-03-19 | 武汉科技大学 | Method for preparing Si3N4/SiC composite ceramic powder from biomass power plant ash |
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| CN104311138B (en) | 2015-12-02 |
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