Dielectric and ferroelectric properties of PZN-PZT ceramics with lanthanum doping

被引：21
|
作者：
Zeng, Xia [1 ]
He, Xiyun [1 ]
Cheng, Wenxiu [1 ]
Zheng, Xinsen [1 ]
Qiu, Pingsun [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期
关键词：
Ferroelectrics; Dielectric response; Doping; Electrical resistivity; LEAD MAGNESIUM NIOBATE; INDUCED PHASE-TRANSITION; PIEZOELECTRIC PROPERTIES; SINGLE-CRYSTALS; RELAXOR FERROELECTRICS; MECHANISM;
D O I：
10.1016/j.jallcom.2009.06.106
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Effects of lanthanum doping on the dielectric and ferroelectric propel-ties of Pb(Zn(1/3)Nb(2/3))(0.3)-(Zr(0.55)Ti(0.45))(0.7)O(3) system ceramics around morphotropic phase boundary (MPB) compositions were presented Samples were prepared by the columbite precursor method. X-ray diffraction results revealed that La-doping stabilized tetragonal phase against rhombohedral phase, and promoted the formation of pyrochlore phase. Dielectric properties indicated that La-doping enhanced the degree of diffuse phase transition. thus improving thermal stability. Hysteresis loop studies revealed that La-doping could decrease coercive field. and increase remnant polarization. La-doping, reduced the concentration of oxygen vacancies. thus increased the electrical resistivity (C) 2009 Elsevier B.V. All rights reserved
引用
收藏
页码：843 / 847
页数：5
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