DONG Weixia, BAO qifu, GU Xingyong

(School of Material Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001)

Abstract: The properties of alumina ceramics are improved significantly by the change of ZnO-CaO-MgO-SiO₂ addition. The sintering, phases and bending strength were investigated. XRD and SEM show: when ZnO content and sintering temperature change, ZnAl₂O₄ phase, mullite phase and anorthite phase change evidently. As a result, the properties of alumina ceramics are changed because of the amount of phase content.

Keywords:ZnO-CaO-MgO-SiO₂ , alumina ceramic, bulk density, bending strength