GUO Ruisong, CHEN Yuru, YANG Zhengfang, YUAN Qiming

（Tianjin University）

Abstract: Improvement of mechanical property of alumina－based ceramics is investigated taking advantage of a small amount of complex sintering aids which includes MgO‚silicate and rare earth or transition metal oxide．It is expected to realize high mechanical property of ZTA ceramics while keeping good sinterability by means of complex sintering aids．It is found that the addition of realtively small amount （2％） of silicate gives rise to densified material and increased strength when sintering at low temperature for short soaking time．Further introduction of different rare earth/transition metal oxides into the material exhibits different effects on strength of ZTA ceramics．The strength is improved to a large extent by La₂O₃ and CeO₂ inclusion．

Keywords: mechanical property‚complex sintering aids‚sintering