摘要
实验研究ＣａＯ－ＭｇＯ一ＳｉＯ２熔块对Ａｌ２Ｏ３瓷烧结的作用结果表明：在２０％ｗｔ％ＣａＯ，３０ｗｔ％ＭｇＯ，５０ｗｔ％ＳｉＯ２区域附近的熔块能很好地促进Ａｌ２Ｏ３瓷的低温烧结；除了第２相对晶界的钉扎作用以及固溶作用外，ＭｇＯ在烧结中的作用能维持ＣａＯ／ＳｉＯ２比，即维持烧结系统中的液相量；Ｌａ２Ｏ３和Ｓｍ２Ｏ３能使Ａｌ２Ｏ３瓷的烧结温度下降大约３０℃。其表面显微结构也有所改善．
he present paper presents the effect of CaO-MgO -SiO2 melt system on the sintering of Al2O3 ceramics. The results indicate that the melt, when at about CaO 20wt%, MgO 30wt% and SiO2 50wt%, can promote the low-temperature sintering of the Al2O3 ceramics. In addition to the beneficial effects of the second--phase pinning and solid solution, the role of MgO is to maintain the CaO / SiO2 ratio, that is, to maintain the quentity of liquid phase in the sintering system. La2O3 and Sm2O3 can lower the sintering tenperature of the Al2O3 ceramics by 30℃ or so and can improve the microstructure of its surface.
出处
《天津大学学报》
EI
CAS
CSCD
1994年第4期501-506,共6页
Journal of Tianjin University(Science and Technology)
关键词
氧化铝基片
低温烧结
氧化铝陶瓷
alumina ceramics, alumina substrate, lower temperature sintering
