Phase transformation and dielectric properties in Ba sub(1-x)La sub(x)Zr sub(0.1)Ti sub(0.9)O sub(3) ceramics

Ba sub(1-x)La sub(x)Zr sub(0-1)Ti sub(0.9)O sub(3) ceramics have been prepared by the mixed-oxide route, and their structure and dielectric properties have been investigated. Results showed that La super(3+) ions entered the unit cell maintaining the perovskite structure. The evolution of dielectric...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-04, Vol.592, p.105-107
Main Authors: Xia, Huang, Jingji, Zhang, Ludong, Ji, Hongfang, Qi, Jiangying, Wang
Format: Article
Language:English
Subjects:
Alloys
Ceramics
Dielectric properties
Dielectric relaxation
Evolution
Ferroelectric materials
Ferroelectricity
Phase transformations
Online Access:Get full text
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Summary:Ba sub(1-x)La sub(x)Zr sub(0-1)Ti sub(0.9)O sub(3) ceramics have been prepared by the mixed-oxide route, and their structure and dielectric properties have been investigated. Results showed that La super(3+) ions entered the unit cell maintaining the perovskite structure. The evolution of dielectric behavior from a sharp dielectric peak with pinched phase transitions (x = 0.00) to a broad dielectric peak with frequency dependence (0.01 < or=, slanted or x < or=, slanted 0.02) and successively to a ferroelectric relaxor (x= 0.05) was observed with increasing La concentration. Furthermore, remnant polarization and strain decreased due to phase transformation from ferroelectric tetragonal to paraelectric pseudocubic at room temperature.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2014.01.015