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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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