摘要
以天然高岭土与碳黑为原料,采用原位碳热还原法,合成了Al2O3／SiC复相陶瓷粉末,探索了一条低成本合成Al2O3／SiC复相陶瓷粉末的新途径。对合成反映的热力学过程进行理论分析和实验研究,探讨了产物的合成条件。研究表明:反映合成过程分为2个阶段,首先是高岭土的脱水阶段。然后是分解产物的还原过程。分解出的莫来石及SiO2与碳发生还原反应,产物为Al2O3和SiC。
Al2O3/SiC composite powder was produced by In-Situ Carbothermic Reduction. Kaolin, a natural mineral was used as the main raw material. The main purpose of the study was to explore a new methed to synthesize the advanced Al2O3/SiC composite power with relatively lower cost. The whole thermodynamics process was analyzed and investigated not only in theory but also through experiments. The synthesis conditions of the product were also discussed. The reaction process was involved in two stages. The first stage is the decomposition of kaolin itself. The second stage is the reduction of kaolin by C. The study shows that the best reduction temperature is 1550℃. The whole process is conducted in argon atmosphere.
出处
《硅酸盐通报》
CAS
CSCD
2004年第4期110-112,共3页
Bulletin of the Chinese Ceramic Society
