Effect of MgO doping on the phase transformations of BaTiO3

Toru Nagai, Kenji Iijima, Hae Jin Hwang, Mutsuo Sando, Tohru Sekino, Koichi Niihara

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80 Citations (Scopus)

Abstract

The successive phase transformations in MgO-doped BaTiO3 were studied. Upon MgO doping, dielectric anomalies corresponding to lower phase transformations were broadened and depressed, while an anomaly for a cubic-tetragonal transformation remained and shifted to a lower temperature. XRD peak splitting upon tetragonality of BaTiO3 was decreased, and the peaks exhibited abnormally broadened profiles which are different from the one for cubic BaTiO3 above Tc. Raman spectroscopy revealed the existence of orthorhombic phase at room temperature for the solid solution with 0.5 mol% or more MgO. The temperature dependence of the Raman spectrum showed that orthorhombic and rhombohedral phases in MgO-doped BaTiO3 were stabilized at higher temperatures than pure BaTiO3.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalJournal of the American Ceramic Society
Volume83
Issue number1
DOIs
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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    Nagai, T., Iijima, K., Hwang, H. J., Sando, M., Sekino, T., & Niihara, K. (2000). Effect of MgO doping on the phase transformations of BaTiO3. Journal of the American Ceramic Society, 83(1), 107-112. https://doi.org/10.1111/j.1151-2916.2000.tb01156.x