Shape-memory effect in PMN-PT(65/35) ceramic

被引：15

作者：

Pandit, P ^{[1
]}

Gupta, SM ^{[1
]}

Wadhawan, VK ^{[1
]}

机构：

[1] Ctr Adv Technol, Laser Mat Div, Indore 245013, Madhya Pradesh, India

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 131卷 / 11期

关键词：

ferroelastics; mechanical properties; phase transitions; shape-memory effect; spontaneous strain;

D O I：

10.1016/j.ssc.2004.06.034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the observation of fairly large and fully recoverable shape-memory strain in thin bars of lead magnesium niobate lead titanate ceramic for a composition (65/35) near its morphotropic phase-boundary. The recoverable shape strain produced by bending and thermal-cycling experiments is similar to0.3%, similar in magnitude to that reported for the shape-memory effect (SME) observed in some other dielectric ceramics. An explanation of the observed SME and the recoverable shape-strain is given in terms of the ferroelastic phase transitions, and the availability of a large number of competing phases and domain states near the morphotropic phase boundary in this material. The stress-induced shifting of the temperatures at which the ferroelastic phase transitions occur also plays an important role in ensuring good crystallographic reversibility around the thermal-cycling experiments. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：665 / 670

页数：6

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