Size-Controlled Hydrothermal Synthesis of Bismuth Sodium and Bismuth Potassium Titanates Fine Particles and Application to Lead-Free Piezoelectric Ceramics

  • Kanie Kiyoshi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Numamoto Yoshiki
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University Fuji Ceramics Corporation
  • Tsukamoto Shintaro
    Fuji Ceramics Corporation
  • Sasaki Takafumi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Nakaya Masafumi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Tani Junji
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • Takahashi Hirofumi
    Fuji Ceramics Corporation
  • Muramatsu Atsushi
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

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説明

Cubic-shaped Bi0.5Na0.5TiO3 (BNT) and Bi0.5K0.5TiO3 (BKT) fine particles with narrow size distribution were directly prepared as a single phase from a suspension of TiO2 anatase nanoparticles mixed with Bi(OH)3 in aqueous alkaline metal hydroxides solutions by highly condensed hydrothermal method at 200–250°C for several hours. It was investigated that the effect of particle mean size on the piezoelectric properties of thus obtained BNT and BKT fine particles.

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