The effect of temperature on the large field electromechanical response of relaxor ferroelectric 8/65/35 PLZT

被引：71
|
作者：
Rauls, Michael B. [1 ]
Dong, Wen [1 ]
Huber, John E. [2 ]
Lynch, Christopher S. [1 ]
机构：
[1] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA
[2] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England
来源：
ACTA MATERIALIA | 2011年 / 59卷 / 07期
关键词：
Ferroelectric; Relaxor; PLZT; Constitutive; Piezoelectric; ELECTRIC-FIELD; ORIENTATION DEPENDENCE; SINGLE-CRYSTALS; UNIAXIAL-STRESS; SOFT PZT; PMN-32-PERCENT-PT CRYSTALS; FLEXOELECTRIC POLARIZATION; TITANATE; BEHAVIOR; NONLINEARITY;
D O I：
10.1016/j.actamat.2011.01.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Full hysteresis loops for the relaxor ferroelectric 8/65/35 PLZT were measured as a function of temperature. The strain electric field hysteresis loops go from butterfly-shaped at 25 degrees C to a non-hysteretic quadratic electrostrictive behavior at 98 degrees C, while the polarization electric field hysteresis loops go from open loops to linear as the temperature is increased. The measured strain is plotted as a function of electric displacement for each temperature, with results showing a quadratic relationship below the Curie peak with a nearly temperature-independent electrostrictive coefficient. The observed material behavior is discussed in terms of a rigid sphere model of the defect structure produced by lanthanum doping and the limitations of modeling this material behavior as a second-order phase transition are discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2713 / 2722
页数：10
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