Paper Title:
Crystal Structure Analysis of High TC Barium Titanate – Bismuth Perovskite-Type Oxide System Ceramics and their Piezoelectric Property
  Abstract

Barium titanate (BaTiO3, BT) – bismuth titanate magnesium oxide (Bi(Mg0.5Ti0.5)O3, BMT) solid solution system ceramics were prepared by conventional sintering method in pursuit of the enhancement of the BT Curie temperature (TC, 132 °C). Normal ferroelectric polarization vs. electric-field (P-E) hysteresis loops were observed for BT-BMT ceramics with BMT contents below 20 and above 60 molar%. On the other hand, broad P-E double hysteresis loops were observed for BMT contents from 30 to 50 molar%. The origin was investigated using synchrotron XRD measurement and Rietveld analysis. The crystal structure was assigned to ferroelectric phase with domain-pinning by certain defect structures. A modified phase diagram was proposed on the basis of the temperature dependence of the crystal structure.

  Info
Periodical
Edited by
Shinobu Fujihara and Tadashi Takenaka
Pages
23-26
DOI
10.4028/www.scientific.net/KEM.445.23
Citation
K. Yamato, N. Kumada, P. Pulpan, S. Ohno, C. Moriyoshi, Y. Kuroiwa, B. Y. Lee, T. Iijima, S. Wada, "Crystal Structure Analysis of High TC Barium Titanate – Bismuth Perovskite-Type Oxide System Ceramics and their Piezoelectric Property", Key Engineering Materials, Vol. 445, pp. 23-26, 2010
Online since
July 2010
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