Electrical properties and relaxation behavior of Bi0.5Na0.5TiO3-BaTiO3 ceramics modified with NaNbO3

Qi Xu, Michael T. Lanagan, Wei Luo, Lin Zhang, Juan Xie, Hua Hao, Minghe Cao, Zhonghua Yao, Hanxing Liu

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Abstract

Electric conduction and dielectric relaxation behavior in (1-x)(Bi0.5Na0.5TiO3-BaTiO3)-xNaNbO3 ((1-x)(BNT-BT)-xNN) ceramics were investigated. All compositions showed negative temperature coefficient of resistance (NTCR) behavior. The bulk conductivity followed the Arrhenius law with Ea = 1.24-1.55 eV, which can be attributed to the electronic conduction. In the modulus (M''-f) spectra, a peak and a shoulder were observed, corresponding to the bulk and polar nano regions (PNRs) response respectively. With the increase of either temperature or NN content, the shoulder gradually depressed and even disappeared. A correlation between the PNRs evolution and the relaxation behavior was constructed.

Original languageEnglish (US)
Pages (from-to)2469-2477
Number of pages9
JournalJournal of the European Ceramic Society
Volume36
Issue number10
DOIs
StatePublished - Aug 1 2016

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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