以硝酸钇、硝酸铝为原料,采用溶胶-凝胶/燃烧合成结合法合成了钇铝石榴石(Y3Al5O12,YAG)超细微粉.用X射线衍射仪(D/Max-2550V型)及傅立叶红外光谱(FT-IR)确定前驱体和不同温度处理的粉末的相组成;借助于德国NETZSCH STA449C TG-MS热分析仪(升温速率为10℃/min)对前驱体粉末的热分解过程进行了研究,由JEM-200CX型透射电镜观察粉体的形貌.结果表明过多的柠檬酸和羧酸盐在400℃分解形成碳酸盐,在800℃YAG相开始逐渐形成,在900℃形成了结晶完全的YAG相,而没有中间相产生.经1000℃热处理获得了超细、分散良好、粒度为80nm左右的均匀粉体.
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