Low-temperature synthesis of Ba(Mg1/3Ta2/3)O-3 ceramics from Ba-Mg-Ta alkoxide precursor

被引:43
作者
Katayama, S
Yoshinaga, I
Yamada, N
Nagai, T
机构
[1] Adv. Technol. Research Laboratories, Nippon Steel Corporation, Nakahara-ku, Kawasaki 211
关键词
D O I
10.1111/j.1151-2916.1996.tb08937.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
BMT perovskite ceramics were synthesized at low temperature (similar to 100 degrees C) by chemical processing comprised of the hydrolysis of Ba-Mg-Ta alkoxide precursor. FT-IR and Raman spectroscopic studies of the Ba-Mg-Ta ethoxide precursor reveal that barium, magnesium, and tantalum ethoxides are bonded with each other via alkoxy bridging to form a trimetallic alkoxide. The hydrolysis of the Ba-Mg-Ta ethoxide with a large amount of water under refluxing results in the direct formation of a crystalline BMT phase with the pseudocubic perovskite structure at a low temperature of similar to 100 degrees C. The alkoxide-derived BMT powder has high sinterability to provide a high-density sintered body with a density of 94.0-98.0% at a low firing temperature of 1400 degrees C.
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页码:2059 / 2064
页数:6
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