WU Jianqiang ¹ WANG Qun ¹ ZHAO guangyan ²

(1. Jingdezhen Ceramic Institute, Jingdezhen 333001; 2. Foshan Oceano Ceramics Co., Ltd, Foshan 528138）

Abstract:Effects of different additives and their amounts on the performance of 95% Al₂O₃ ceramics were studied by orthogonal experiments, in which CaCO₃, MgCO₃, BaCO₃ ZrO₂ were used as chemical additives. The primary and secondary influencing factors and their effects on the properties of this ceramics were obtained. The sample formula obtained by orthogonal design experiments exhibits optimal properties: ε>9.60，tgδ<2.1×10^-4，ρ>3.62g/cm3 and Ej>25KV/mm.

Keywords:CaO-Al₂O₃-SiO₂ system, chemical additive, orthogonal experiment