MgO─CeO2烧结助剂对常压烧结氮化硅陶瓷致密化和性能的影响  

ROLE OF MgO CeO 2 SINTERING AID IN DENSIFICATION OF Si 3N 4

作　　者：徐润泽[1,2] 黄培云 杨海涛[1,2] 

机构地区：[1]武汉工业大学新材料研究所 [2]中南工业大学粉冶所

出　　处：《中国有色金属学报》1996年第3期91-95,共5页The Chinese Journal of Nonferrous Metals

摘　　要：系统研究了ＭｇＯＣｅＯ２烧结助剂对常压烧结氮化硅陶瓷致密化过程及其性能的影响，发现ＭｇＯＣｅＯ２是一种非常有效的烧结助剂，其致密化效果比单独用ＭｇＯ或ＣｅＯ２要好得多，常压烧结的Ｓｉ３Ｎ４ＭｇＯＣｅＯ２陶瓷，相对密度为９８．５％，室温强度可达９４８ＭＰａ。An investigation of the pressureless sintering of Si 3N 4 with MgO CeO 2 revealed that MgO CeO 2 is a much more effective sintering aid for silicon nitride than either MgO or CeO 2. The amount of MgO CeO 2 and MgO/CeO 2 mass ratio have strong influence on the densification behaviour and mechanical properties of the sintered materials. The silicon nitride pressurelessly sintered with MgO CeO 2 retains a relative density of 98.5% and a bending strength of 948 MPa.

关 键 词：烧结 致密化 氮化硅陶瓷 助剂 

分 类 号：TF124.5[冶金工程—粉末冶金]