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Phase transformation and dielectric properties in Ba1−xLaxZr0.1Ti0.9O3ceramics

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
592
Identifiers
DOI: 10.1016/j.jallcom.2014.01.015
Keywords
  • Perovskite Structure
  • Phase Transformation
  • Relaxor Behavior
  • Strain Behavior

Abstract

Abstract Ba1−xLaxZr0.1Ti0.9O3 ceramics have been prepared by the mixed-oxide route, and their structure and dielectric properties have been investigated. Results showed that La3+ 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⩽x⩽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.

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