Preparation and characterization of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 electrocaloric ceramics

被引：0
|
作者：
Zhang, R [1 ]
Peng, S [1 ]
Xiao, D [1 ]
Wang, Y [1 ]
Yang, B [1 ]
Zhu, J [1 ]
Yu, P [1 ]
Zhang, W [1 ]
机构：
[1] Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 1998年 / 33卷 / 05期
关键词：
D O I：
10.1002/(SICI)1521-4079(1998)33:5<827::AID-CRAT827>3.0.CO;2-H
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Lead magnesium niobate Pb(Mg1/3Nb2/3)O-3 - lead titanate PbTiO3 [abbr. as (1 - x) PMN-x PT] ferroelectric ceramics with different excesses of MgO and PbO were systematically studied under different processing conditions for ferroelectric refrigeration application. It was found that the excess amount of MgO and PbO, and the sintering temperature have great effect on the crystallographic properties of the ceramics. In our experiments. (1 - x) PMN-x PT (x = 0.08, x = 0.10, and x = 0.25 respectively) with the excesses of 2 mol% MgO and 2 mol% PbO ceramics sintered at 1250 degrees C/1 hour possess the desired perovskite structures and large electrocaloric temperature change (Delta T = 1 K and more) in the vicinity of room temperature under a de electric field of 1.5 kV/mm. It is expected that (1 - x) PMN-x PT electrocaloric ceramics could be applied for cascade refrigeration near room temperature.
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收藏
页码：827 / 832
页数：6
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