Origin of thermal depolarization in piezoelectric ceramics

被引：20
作者：
Liao, Qingwei [1 ]
Huang, Panfeng [2 ]
An, Zhao [1 ]
Li, Dan [3 ]
Huang, Haining [1 ]
Zhang, Chunhua [1 ]
机构：
[1] Chinese Acad Sci, Inst Acoust, Beijing 100190, Peoples R China
[2] Tianjin Polytech Univ, Sch Elect & Informat Engn, Tianjin 300387, Peoples R China
[3] Stanford Univ, Elect Engn, 350 Serra Mall, Stanford, CA 94305 USA
来源：
SCRIPTA MATERIALIA | 2016年 / 115卷
关键词：
Piezoelectric; Curie temperature; Thermal depolarization;
D O I：
10.1016/j.scriptamat.2015.12.030
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
PZT, BSPT, PT, and two lead-free Bi2WO6, as five of the most representative piezoelectric systems with different Curie points were selected to study the origin of thermal depolarization in piezoelectric ceramics. The temperature dependences of dielectric loss and dielectric constant curves show that dielectric loss peaks of PZT(MN), BSPTPNW, PTBFM, BWLi, and BWLa are at 330 degrees C, 392.2 degrees C, 495 degrees C, 598.8 degrees C, and 781 degrees C, respectively. The results of thermal depoling measurement show that the depolarization temperature is closely related to the dielectric loss peak. And the peak points of dielectric loss curves below or at the Curie temperature are the points of complete depolarization. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 18
页数：5
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