SOME ROLES OF MGO AND TIO2 IN DENSIFICATION OF A SINTERABLE ALUMINA

被引:45
作者
IKEGAMI, T [1 ]
KOTANI, K [1 ]
EGUCHI, K [1 ]
机构
[1] MITSUI MINING CO LTD,TOCHIGI 32803,JAPAN
关键词
MAGNESIUM COMPOUNDS - POWDERS - Densification - TITANIUM COMPOUNDS;
D O I
10.1111/j.1151-2916.1987.tb04911.x
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Sinterability of undoped, MgO-doped, and TiO//2-doped Al//2O//3 has been examined by applying reported sintering equations. The order of sinterability was MgO-doped approximately equals undoped VM LS TH TiO//2-doped Al//2O//3 in the initial and intermediate stages of sintering, but a relative sintered density at 1600 degree C for 1 h occurred in the order undoped approximately equals TiO//2-doped less than MgO-doped Al//2O//3. The dispersion of thermal grooving angles increased in the order MgO-doped less than undoped less than TiO//2-doped Al//2O//3. The change of sinterability by the dopants is explained in terms of mobility of mass transfer estimated from a densification rate in the initial- and intermediate-stage sintering and of dispersed driving forces of densification and grain growth qualitatively evaluated from the width of the dispersion of thermal grooving angles.
引用
收藏
页码:885 / 890
页数:6
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