Mechanisms of electromechanical response in (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 ceramics

被引：37

作者：

Acosta, Matias ^{[1
]}

Novak, Nikola ^{[1
]}

Rossetti, George A., Jr. ^{[1
,2
,3
]}

Roedel, Juergen ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

[2] Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA

[3] Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 14期

关键词：

ZIRCONATE-TITANATE CERAMICS; FERROELECTRIC SOLID-SOLUTIONS; THIN-FILMS; THERMODYNAMICS; PIEZOCERAMICS; STRESS; STRAIN;

D O I：

10.1063/1.4932654

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Contributions to the piezoelectric response of (1 - x) Ba(Zr0.2Ti0.8)O-3-x(Ba0.7Ca0.3)TiO3 ceramics are quantified by small signal measurements made as functions of bias field and temperature. The highest fraction of intrinsic contributions is observed far from phase boundaries, of extrinsic contributions around phase boundaries, and of irreversible switching in the orthorhombic phase. The largest piezoelectric response, d(33) = 475 +/- 85 pC/N, is found near the orthorhombic to tetragonal phase boundary due to both reversible and irreversible switching. A peak in reversible switching above the Curie temperature for all compositions suggests a line of critical points associated with first order phase transitions, indicating that concurrence of triple and tricritical points in the zero-field phase diagram is not the responsible mechanism of enhanced piezoelectricity. (C) 2015 AIP Publishing LLC.

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页数：5

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