Zirconia sol ( ZrO2) was added into corundum-mullite materials by sol-gel technology, and the effect mechanism of silica sol on the properties of corundum-mullite ceramics was investigated. 采用溶胶-凝胶法合成了锆溶胶,并在刚玉-莫来石质材料中引入ZrO2,分析了ZrO2溶胶对刚玉-莫来石复相陶瓷性能的影响特征。