Effect of excess Bi2O3on the electrical properties and microstructure of (Bi1/2Na1/2)TiO3ceramics

X. X. Wang, X. G. Tang, Kin Wing Kwok, H. L.W. Chan, C. L. Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review

55 Citations (Scopus)

Abstract

(Bi1/2Na1/2)TiO3ceramics (BNT) with 0-6 mol% of excess Bi2O3are prepared by conventional solid-state sintering. The electrical properties of the samples are examined. The addition of excess Bi2O3reduces the leakage current of BNT ceramics significantly, thus facilitating the poling process, and improves their piezoelectric properties slightly for certain amounts of added Bi2O3. BNT ceramics have very high dielectric constants and dissipation factors at low frequency and high temperature due to their high conductivity. Adding excess Bi2O3to BNT ceramics affects their dielectric behavior and phase transition temperatures. Grain growth is suppressed by adding Bi2O3and no second phase is observed for BNT ceramics with up to 6 mol% of excess Bi2O3added.
Original languageEnglish
Pages (from-to)1071-1075
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume80
Issue number5
DOIs
Publication statusPublished - 1 Feb 2005

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

Cite this