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Silicon carbide foamed ceramic and preparation method thereof
The invention provides a preparation method of silicon carbide foamed ceramic, which comprises the following steps: S1, uniformly stirring silicon carbide powder, aluminum oxide powder, polyvinyl alcohol, silica sol, polyacrylamide and sodium carboxymethyl cellulose, carrying out ball milling treatment, and finally adding n-butyl alcohol to obtain ceramic slurry; S2, pretreating a polyurethane foam template, and immersing the pretreated polyurethane foam template into the ceramic slurry; drying the polyurethane foam template to obtain a ceramic body; S3, carrying out pre-sintering treatment on the ceramic green body to obtain a ceramic pre-sintered body; S4, mixing divinyl benzene, a free radical initiator and crystalline silicon cutting powder, and performing ultrasonic treatment to obtain a silicon powder suspension; S5, immersing the ceramic pre-sintered body into the silicon powder suspension, keeping for 55-65 minutes in a vacuum environment, taking out the ceramic pre-sintered body, drying for 1.5-2.5 hours at 90-110 DEG C, and carrying out surface cross-linking curing reaction to obtain a cured product; and S6, carrying out high-temperature sintering on the cured product to obtain the silicon carbide foamed ceramic. The silicon carbide foamed ceramic has good mechanical properties.
本发明提供了一种碳化硅泡沫陶瓷的制备方法，包括以下步骤：S1，将碳化硅粉体、氧化铝粉体、聚乙烯醇、硅溶胶、聚丙烯酰胺、羧甲基纤维素钠，搅拌均匀，球磨处理，最后加入正丁醇，得到陶瓷浆料；S2，将聚氨酯泡沫模板进行预处理后浸入陶瓷浆料；再将聚氨酯泡沫模板干燥，得到陶瓷坯体；S3，将陶瓷坯体进行预烧结处理，得到陶瓷预烧体；S4，将二乙烯基苯、自由基引发剂、晶硅切割粉混合，超声处理，得到硅粉悬浮液；S5，将陶瓷预烧体浸入硅粉悬浮液中，在真空环境保持55～65min，取出陶瓷预烧体于90～110℃中干燥1.5～2.5h，进行表面交联固化反应，得到固化产物；S6，将固化产物进行高温烧结，即得所述的碳化硅泡沫陶瓷。该碳化硅泡沫陶瓷的机械性能好。
Silicon carbide foamed ceramic and preparation method thereof
The invention provides a preparation method of silicon carbide foamed ceramic, which comprises the following steps: S1, uniformly stirring silicon carbide powder, aluminum oxide powder, polyvinyl alcohol, silica sol, polyacrylamide and sodium carboxymethyl cellulose, carrying out ball milling treatment, and finally adding n-butyl alcohol to obtain ceramic slurry; S2, pretreating a polyurethane foam template, and immersing the pretreated polyurethane foam template into the ceramic slurry; drying the polyurethane foam template to obtain a ceramic body; S3, carrying out pre-sintering treatment on the ceramic green body to obtain a ceramic pre-sintered body; S4, mixing divinyl benzene, a free radical initiator and crystalline silicon cutting powder, and performing ultrasonic treatment to obtain a silicon powder suspension; S5, immersing the ceramic pre-sintered body into the silicon powder suspension, keeping for 55-65 minutes in a vacuum environment, taking out the ceramic pre-sintered body, drying for 1.5-2.5 hours at 90-110 DEG C, and carrying out surface cross-linking curing reaction to obtain a cured product; and S6, carrying out high-temperature sintering on the cured product to obtain the silicon carbide foamed ceramic. The silicon carbide foamed ceramic has good mechanical properties.
本发明提供了一种碳化硅泡沫陶瓷的制备方法，包括以下步骤：S1，将碳化硅粉体、氧化铝粉体、聚乙烯醇、硅溶胶、聚丙烯酰胺、羧甲基纤维素钠，搅拌均匀，球磨处理，最后加入正丁醇，得到陶瓷浆料；S2，将聚氨酯泡沫模板进行预处理后浸入陶瓷浆料；再将聚氨酯泡沫模板干燥，得到陶瓷坯体；S3，将陶瓷坯体进行预烧结处理，得到陶瓷预烧体；S4，将二乙烯基苯、自由基引发剂、晶硅切割粉混合，超声处理，得到硅粉悬浮液；S5，将陶瓷预烧体浸入硅粉悬浮液中，在真空环境保持55～65min，取出陶瓷预烧体于90～110℃中干燥1.5～2.5h，进行表面交联固化反应，得到固化产物；S6，将固化产物进行高温烧结，即得所述的碳化硅泡沫陶瓷。该碳化硅泡沫陶瓷的机械性能好。
Silicon carbide foamed ceramic and preparation method thereof
一种碳化硅泡沫陶瓷及其制备方法
LUO XUETAO (author) / MENG XIANGYUAN (author) / HUANG LIUQING (author) / LI YAN (author) / CHEN GUANGYU (author) / HUANG LIUYING (author)
2021-08-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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