Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing silicon carbide foam material through low-temperature sintering
The invention provides a method for preparing a silicon carbide foamed ceramic material by low-temperature sintering, which comprises the following steps: mixing silicon carbide micro powder, silicon dioxide micro powder and phosphoric acid powder, heating to 200 DEG C in a crucible, cooling to room temperature, adding polyvinyl alcohol, polyacrylamide and sodium carboxymethyl cellulose, and treating to obtain ceramic slurry; soaking a polyurethane foam template in a 15% sodium hydroxide solution for 3 hours, and then soaking the polyurethane foam template in the ceramic slurry; drying the polyurethane foam template to obtain a ceramic green body, treating the ceramic green body to obtain a ceramic pre-sintered body, mixing divinyl benzene, a free radical initiator and silicon carbide micro-powder, treating to obtain a silicon carbide micro-powder suspension, immersing the ceramic pre-sintered body into the silicon carbide micro-powder suspension, and keeping in a nitrogen environment for 2 hours to obtain the silicon carbide ceramic. And taking out the ceramic pre-sintered body, pre-sintering at 200 DEG C for 2 hours to obtain a cured product, and sintering the cured product at 800-850 DEG C to obtain the silicon carbide foamed ceramic skeleton which is low in density and excellent in wear resistance.
本发明提供了一种低温烧结制备碳化硅泡沫陶瓷材料的方法，包括以下步骤：将碳化硅微粉、二氧化硅微粉、磷酸粉末混合，在坩埚中加热到200℃，冷却到室温后，再加入聚乙烯醇、聚丙烯酰胺、羧甲基纤维素钠，进行处理，得到陶瓷浆料，将聚氨酯泡沫模板采用15%的氢氧化钠溶液浸泡3小时后，浸入陶瓷浆料；再将聚氨酯泡沫模板干燥，得到陶瓷坯体，将陶瓷坯体进行处理得到陶瓷预烧体，将二乙烯基苯、自由基引发剂、碳化硅微粉混合，处理后得到碳化硅微粉悬浮液，将陶瓷预烧体浸入碳化硅粉悬浮液中，在氮气环境保持2小时，取出陶瓷预烧体于200℃中预烧结2小时，得到固化产物，将固化产物在800‑850℃下烧结，得到碳化硅泡沫陶瓷骨架该材料密度低，耐磨性能优异。
Method for preparing silicon carbide foam material through low-temperature sintering
The invention provides a method for preparing a silicon carbide foamed ceramic material by low-temperature sintering, which comprises the following steps: mixing silicon carbide micro powder, silicon dioxide micro powder and phosphoric acid powder, heating to 200 DEG C in a crucible, cooling to room temperature, adding polyvinyl alcohol, polyacrylamide and sodium carboxymethyl cellulose, and treating to obtain ceramic slurry; soaking a polyurethane foam template in a 15% sodium hydroxide solution for 3 hours, and then soaking the polyurethane foam template in the ceramic slurry; drying the polyurethane foam template to obtain a ceramic green body, treating the ceramic green body to obtain a ceramic pre-sintered body, mixing divinyl benzene, a free radical initiator and silicon carbide micro-powder, treating to obtain a silicon carbide micro-powder suspension, immersing the ceramic pre-sintered body into the silicon carbide micro-powder suspension, and keeping in a nitrogen environment for 2 hours to obtain the silicon carbide ceramic. And taking out the ceramic pre-sintered body, pre-sintering at 200 DEG C for 2 hours to obtain a cured product, and sintering the cured product at 800-850 DEG C to obtain the silicon carbide foamed ceramic skeleton which is low in density and excellent in wear resistance.
本发明提供了一种低温烧结制备碳化硅泡沫陶瓷材料的方法，包括以下步骤：将碳化硅微粉、二氧化硅微粉、磷酸粉末混合，在坩埚中加热到200℃，冷却到室温后，再加入聚乙烯醇、聚丙烯酰胺、羧甲基纤维素钠，进行处理，得到陶瓷浆料，将聚氨酯泡沫模板采用15%的氢氧化钠溶液浸泡3小时后，浸入陶瓷浆料；再将聚氨酯泡沫模板干燥，得到陶瓷坯体，将陶瓷坯体进行处理得到陶瓷预烧体，将二乙烯基苯、自由基引发剂、碳化硅微粉混合，处理后得到碳化硅微粉悬浮液，将陶瓷预烧体浸入碳化硅粉悬浮液中，在氮气环境保持2小时，取出陶瓷预烧体于200℃中预烧结2小时，得到固化产物，将固化产物在800‑850℃下烧结，得到碳化硅泡沫陶瓷骨架该材料密度低，耐磨性能优异。
Method for preparing silicon carbide foam material through low-temperature sintering
一种低温烧结制备碳化硅泡沫材料的方法
HE GUOQIU (Autor:in) / LIU XIAOSHAN (Autor:in) / ZHOU YUEJIAN (Autor:in) / ZHOU ZHIQIANG (Autor:in) / LIAO YIPING (Autor:in) / LIU YINFU (Autor:in) / HUANG ZI'AO (Autor:in) / LI RUOYUN (Autor:in) / WANG ZEYUE (Autor:in) / WU YANGFAN (Autor:in)
27.06.2023
Patent
Elektronische Ressource
Chinesisch
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