Optimization of preparation conditions of highly textured piezoelectric (Bi0.5K0.5)TiO3 ceramics

Gopal Prasad Khanal, Ichiro Fujii, Sangwook Kim, Shintaro Ueno, Tohru S. Suzuki, Satoshi Wada

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Layered titanate H1.08Ti1.73O4·nH2O (HTO) particles with plate-like morphology were used as a template for the fabrication of grain-oriented bismuth potassium titanate [(Bi0.5K0.5)TiO3, or BKT] ceramics by a reactive-templated grain growth method. Single perovskite-phase textured BKT ceramics were successfully fabricated with optimizing the preparation conditions such as mixing procedure of matrix and template particles with a binder solution, temperature programs for binder removal and sintering, and sintering conditions. Microstructure evaluation suggested that the sintering with or without weight-pressing and a temperature program used could significantly affect the degree of texture development. The debinding and sintering with weight-pressing helped on the proper alignment of oriented particles and/or grains along with promoting the growth of the oriented plate-like BKT particles, formed by an in situ topotactic transformation reaction of plate-like HTO templates, resulting in a high degree of orientation. Using optimum preparation conditions, single perovskite-phase BKT ceramics with grain-orientation over 85% were successfully fabricated for the first time via a conventional sintering method.

Original languageEnglish
Pages (from-to)362-368
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume127
Issue number6
DOIs
Publication statusPublished - 2019 Jun 1
Externally publishedYes

Keywords

  • (BiK)TiO ceramics
  • Conventional sintering
  • Embedded sintering
  • HTO templates
  • Oriented
  • RTGG
  • Single perovskite-phase
  • Weighted

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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