PREPARATION OF CALCIUM LANTHANUM SULFIDE POWDERS VIA ALKOXIDE SULFURIZATION

被引：27
|
作者：
HAN, Y [1 ]
AKINC, M [1 ]
机构：
[1] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 11期
关键词：
D O I：
10.1111/j.1151-2916.1991.tb06848.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：
Calcium lanthanum sulfide powders were prepared by reacting methoxides of calcium and lanthanum with H2S. Alkoxide mixtures of various La/Ca ratios dispersed in methanol were reacted with H2S at 25-degrees to 85-degrees-C and the amorphous gels obtained after the removal of methanol were heat-treated in H2S for full sulfurization at various temperatures. Up to 500-degrees-C, cubic LaS2 was the only crystalline phase present. Calcium lanthanum sulfide phase started to form at 550-degrees-C. In the temperature range of 650-degrees to 750-degrees-C, single-phase calcium lanthanum sulfide powders were obtained for La/Ca = 2.41 and 2.68.
引用
收藏
页码：2815 / 2819
页数：5
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