新型高温相变相界压电陶瓷

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002. Pub Date : 2002-05-28 DOI:10.1109/ISAF.2002.1195923

T. Shrout, R. Eitel, C. Randall, E. Alberta, P. Rehrig

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引用次数: 10

摘要

研究了铁电相变(T/sub c/)超过PbZrO/sub 3/-PbTiO/sub 3/ (PZT)的新型亲晶相界(MPB)压电材料。基于钙钛矿耐受因子- T/sub - c/关系，在Bi(Me)O/sub - 3/- pbtio /sub - 3/体系中预测了新的高T/sub - c/ MPB体系，其中Me是相对较大的B/sup +3/-位阳离子。对于(1-x)BiScO/sub - 3/-(x)PbTiO/sub - 3/固溶体，在x-0.64处发现了一个MPB，分离了菱形相和四方相，相应地增强了介电和压电性能。用较低容差系数的系统投影较高的T/sub c/s，确定了转变温度T/sub c/ / / / / /450/spl deg/ c。

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New high temperature morphotropic phase boundary piezoelectric ceramics

New morphotropic phase boundary (MPB) piezoelectrics with ferroelectric phase transitions (T/sub c/) exceeding that of PbZrO/sub 3/-PbTiO/sub 3/ (PZT) were investigated. Based on a perovskite tolerance factor - T/sub c/ relationship, new high T/sub c/ MPB systems were projected in Bi(Me)O/sub 3/-PbTiO/sub 3/ systems, where Me is a relatively large B/sup +3/-site cation. For the (1-x)BiScO/sub 3/-(x)PbTiO/sub 3/ solid solution, a MPB was found at x-0.64 separating the rhombohedral and tetragonal phases, with correspondingly enhanced dielectric and piezoelectric properties. A transition temperature T/sub c/ of /spl sim/450/spl deg/C was determined with higher T/sub c/s projected with lower tolerance factor systems.

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来源期刊

Proceedings of the 13th IEEE International Symposium on Applications of Ferroelectrics, 2002. ISAF 2002.

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