添加MgO对碳热还原法合成尖晶石型氮氧化铝粉末的影响  

EFFECT OF ADDITION OF MgO ON CARBOTHERMAL REDUCTION SYNTHESIS OF ALUMINUM OXYNITRIDE SPINEL POWDER

作　　者：李亚伟[1,2] 李楠[1,2] 袁润章 

机构地区：[1]武汉冶金科技大学材料科学与工程学院 [2]武汉工业大学新材料研究所

出　　处：《硅酸盐学报》1997年第6期669-674,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金;冶金部科技司资助

摘　　要：研究了碳热还原氧化铝合成尖晶石型氮氧化铝（γＡｌＯＮ）粉末。结果表明：氮氧化铝相是碳热还原法合成ＡｌＮ粉末的过渡相，受其稳定性的影响，很难在低于１６５０℃下制备出纯氮氧化铝相的粉末，但引入一定量的氧化镁可以在低于此温度下合成纯氮氧化铝相粉末。用ＸＲＤ，ＳＥＭ及ＥＭＰＡ分析了其相成分、形貌以及氮氧化铝相的晶格常数与外加剂引入量的关系。用Ｍａｌｖｅｒｎ激光粒度仪分析了合成的氮氧化铝粉末，其具有粒度小、粒径分布窄等特点。The synthesis of aluminum oxynitride(γAlON) powder by carbothermal reduction of aluminum oxide was studied. The relationships between heating temperature, adding content of MgO and lattice constant of AlON phase were investigated. Also, the characteristics (such as: morphology, phase composition, particle size distribution, etc.)of the synthesized powder were observed/or analyzed by XRD, EMPA and particle size analyzer. It is shown that AlON is an intermediate phase in the carbothermal reduction process and it is difficult to prepare pure AlON powder below 1650℃ owing to instability in this temperature range. However, powder with high AlON content can be manufactured below this temperature when a certain content of MgO is added in Al2O3/C mixture. With increase of MgO amount, the AlON content and lattice constants of AlON increase, and with increase of temperature, the lattice constants of AlON decrease. The synthesized AlON powder is fine powder with a narrow particle size distribution.

关 键 词：碳热还原 氮氧化铝 氧化镁 尖晶石型 陶瓷粉末 

分 类 号：TQ174.758[化学工程—陶瓷工业]