Synthesis, structural and dielectric properties of Ce-doped lead lanthanum titanate

被引：9
|
作者：
Lemziouka, H. [1 ,2 ,3 ]
Omari, L. H. [3 ,4 ]
Moubah, R. [3 ]
Abid, M. [1 ,2 ]
Lassri, H. [3 ]
Sayouri, S. [4 ]
机构：
[1] Univ Hassan II Casablanca, Renewable Energy Lab, Fac Sci Ain Chock, Maarif, Morocco
[2] Univ Hassan II Casablanca, Dynam Syst, Fac Sci Ain Chock, Maarif, Morocco
[3] Univ Hassan II Casablanca, Fac Sci Ain Chock, LPMMAT, Maarif 5366, Morocco
[4] Fac Sci DM, LPTA, Dept Phys, BP 1796, Fez Atlas, Morocco
来源：
MATERIALS RESEARCH BULLETIN | 2017年 / 92卷
关键词：
Dielectric properties; Ac conductivity; Perovskite; CERAMICS;
D O I：
10.1016/j.materresbull.2017.04.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Ce doping on the structural, dielectric and ac conductivity properties of Pb0.79-xCexLa0.21TiO3 powders (x = 0, 0.01, 0.03, 0.05 and 0.1) was investigated. X-ray diffraction shows that all samples have the pseudo-cubic crystal structure, in which the tetragonality and cell volume decrease with increasing Ce content. The change of the dielectric constant as a function of temperature demonstrates that the phase transition temperature decreases with the increase of Ce content. Normal behavior of the phase transition from ferroelectric to paraelectric was observed for Ce-doped samples, while the undoped powders exhibit a combination of diffuse phase transition and relaxor behaviors. From electrical conductivity versus 1/T plots, we have determined the activation energy, which was found to increase with increasing Ce concentration. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：85 / 89
页数：5
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