复合添加剂对全粉料制α-A1_2O_3陶瓷抗热震性的影响  

The Effects of Compound Additives on Thermal Shock Resistance of α-Al_2O_3 Fine Particles

作　　者：元敬顺[1] 谈家琪[2] 沈继耀[2] 

机构地区：[1]河北建筑工程学院 [2]天津大学

出　　处：《硅酸盐通报》2000年第2期9-12,共4页Bulletin of the Chinese Ceramic Society

摘　　要：本文研究了0．3wt％TiO2和Mgo＋Y2O3＋La2O3复合添加剂对全粉料a-Al2O3抗热震性的影响人试样热震后的抗折强度保持率来看，当复合添加剂含量为0．375wt％及0．5wt％时，不仅可以促进烧结，且由于添加剂有细化晶粒的作用，可使全粉料a-A12O3抗热见性提高。The effects of 0.3wt% TiO2 and MgO + LA2O3 + Y2O3 compound additives on thermal shock resistance bf a-Al2O3 fine particles were studied in this paper. The bending strengh after and before thermal shock were examined . The experimental results showed that sintering of a-Al2O3 fine particles can be promoted by 0. 3wt% TiO2and 0. 375wt% or 0.5wt% MgO + La2O3 + Y2O3 compound additives and inhibited the gnin growth and resulted in finer crystallite. The mechanical properties and thermal shock resistance were improved.

关 键 词：抗热震性 细化晶粒 复合添加剂 三氧化二铝陶瓷 

分 类 号：TQ174.758[化学工程—陶瓷工业] TQ174.13[化学工程—硅酸盐工业]