1:1 ordered domain growth in Pb(Mg1/3Ta2/3)O3-La(Mg2/3Ta1/3)O3 relaxor ferroelectric perovskites

被引:23
作者
Montgomery, JK [1 ]
Akbas, MA [1 ]
Davies, PK [1 ]
机构
[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
关键词
D O I
10.1111/j.1151-2916.1999.tb02269.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
Single-phase perovskite solid solutions are formed across the entire (1-x)Pb(Mg1/3Ta2/3)O-3-xLa(Mg2/3Ta1/3)O-3 (PLMT) pseudobinary system. although as-sintered (1300 degrees C, 3 h) samples with x less than or equal to 0.1 adopt a phase-separated, "PMN-type" microstructure comprising small (2-3 nm) ordered domains dispersed in a disordered matrix, extensive domain growth and complete order can be induced by extended thermal annealing (1300 degrees C, 24 h), These observations, and the alterations in the thermal stability and domain size across the system, can be interpreted using a charge-balanced random site model for the cation order. No evidence is found to support the space-charge models currently used to describe the cation ordering and properties of the corresponding niobate systems.
引用
收藏
页码:3481 / 3484
页数:4
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