Electrocaloric effect in some perovskite ferroelectric ceramics and multilayer capacitors

被引：117

作者：

Shebanovs, L ^{[1
]}

Borman, K

Lawless, WN

Kalvane, A

机构：

[1] Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia

[2] CeramPhys Inc, Westerville, OH 43081 USA

来源：

FERROELECTRICS | 2002年 / 273卷

关键词：

ferroelectric ceramics; perovskite structure; electrocaloric effect; phase transitions; ion substitutions; multilayer capacitors;

D O I：

10.1080/00150190211761

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrocaloric effect (ECE) of pure and modified PbSc1/2Ta1/2O3 (PST) and its solid solutions and PbMg1/3Nb2/3O3 - PbTiO3 ferroelectric ceramics is studied at different temperatures and external electric field intensities. High value of (ECE) up to 2.3 K is observed in PST ceramics at modification in B sublattice by Co3+ and Sb5+ ions. The features of ECE in PST are explained by significant structure rearrangement at electric field induced Fm3m --> R3m phase transition and high long range ordering of B ions in the ABO(3) perovskite structure. A further increase of ECE is observed in ceramic multilayer capacitors at higher electric field intensities up to 138 kV/cm.

引用

页码：2515 / 2520

页数：6

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