Influence of bismuth additives on the dielectric properties of Pb(Fe2/3W1/3)0.7Ti0.3O3 ceramics

Hsiau Hsian Nien, Cheng Shong Hong, Sheng Yuan Chu, Hsiu Hsien Su, Chun Hsien Lin

Research output: Contribution to journalArticle

Abstract

In this study, the effects of bismuth additives are investigated based on the dielectric properties by the empirical law and the order-disorder model for the Pb(Fe2/3W1/3)0.7Ti0.3O3-x wt.% Bi2O3 ceramics. The grain size initially increased and the diffused phase transition property initially decreased at x = 0.25 wt.% and then these properties reversed. In addition, the space charge polarization is weakened and then reinforced when the amount of bismuth additives increases. According to these experimental results and the model fitting results, it is concluded that bismuth additives can induce the random-site 1:1 order and change the dielectric properties from relaxor ferroelectric to normal ferroelectric by substituting bismuth ions for the lead vacancies. Furthermore, excess amounts of bismuth additives impede the grain growth and change the dielectric properties from normal ferroelectric to relaxor ferroelectric.

Original languageEnglish
Article number34782
Pages (from-to)584-591
Number of pages8
JournalJournal of Alloys and Compounds
Volume650
DOIs
Publication statusPublished - 2015 Nov 25

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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