CRYSTAL STRUCTURAL STUDIES OF THERMAL-DECOMPOSITION PROCESS OF PBMG(1/3)NB(2/3)O-3 SINGLE-CRYSTAL INTO PYROCHLORE TYPE COMPOUND

被引：0
|
作者：
WAKIYA, N
ISHIZAWA, N
SAIKI, A
SHINOZAKI, K
MIZUTANI, N
机构：
[1] TOKYO INST TECHNOL,FAC ENGN,DEPT INORGAN MAT,MEGURO KU,TOKYO 152,JAPAN
[2] TOKYO INST TECHNOL,ENGN MAT RES LAB,MIDORI KU,YOKOHAMA,KANAGAWA 227,JAPAN
来源：
NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 1994年 / 102卷 / 01期
关键词：
LEAD MAGNESIUM NIOBIUM OXIDE; PMN; SINGLE CRYSTAL; CRYSTAL STRUCTURE DETERMINATION; PYROCHLORE; THERMAL DECOMPOSITION;
D O I：
暂无
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：
Crystal structure parameters including B thermal parameters of each constituent atom were determined for PbMg1/3Nb2/3O3 (PMN) between 27 and 700 degrees C by the single crystal high temperature X-ray diffraction technique. For lead, and magnesium and niobium atoms, the optimum shift directions from the special positions were not a single direct-ion but ''spherical'' shifts were observed. For oxygen atom, it was confirmed that the optimum shift direction was not one ring on XY plane but two parallel rings away from XY plane. PMN began to decompose into polycrystalline pyrochlore type compound at 600 degrees C. The mechanism of decomposition was discussed from the view point of crystal structure.
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页码：8 / 12
页数：5
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