全粉料α-Al_2O_3烧结性能的研究  

Study on Sintering Properties of α-Al 2O 3 Fine Particles

作　　者：元敬顺[1] 杨德安[1] 谈家琪[1] 沈继耀[1] 

机构地区：[1]天津大学

出　　处：《硅酸盐通报》1998年第4期63-66,共4页Bulletin of the Chinese Ceramic Society

摘　　要：本文研究了ＴｉＯ２和ＭｇＯ＋Ｙ２Ｏ３＋Ｌａ２Ｏ３添加剂及微粉对全粉料α－Ａｌ２Ｏ３烧结性能的影响。测试了试样的体积密度，显气孔率及抗弯强度，用ＳＥＭ分析了显微结构。结果表明：加０．３ｗｔ％ＴｉＯ２即可显著促进烧结，添加ＭｇＯ＋Ｙ２Ｏ３＋Ｌａ２Ｏ３复合添加剂可抑制晶粒生长，使晶粒得以细化。微粉含量由３３％增至４３％可显著促进烧结。The effects of TiO 2, compound (MgO+Y 2O 3+La 2O 3) additives and ultrafine α-Al 2O 3 powders on sintering properties of α-Al 2O 3 fine particle were studied in this paper. The bulk density, porosity and bending strength of samples were examined and the microstructure was investigated by SEM. The results showed that the sample with 0.3 wt% TiO 2 obtained higher sintering density and that small amount of MgO+La 2O 3+Y 2O 3 inhibited the grain growth of α-Al 2O 3, thus resulting in fine crystalls. Sintering can be promoted by increasing the ultrafine powder content from 33% to 43%.

关 键 词：烧结 添加剂 三氧化二铝 粉料 

分 类 号：TQ133.1[化学工程—无机化工]