Phase transition and failure at high temperature of bismuth-layered piezoelectric ceramics

Liaoying Zheng, Guorong Li, Qingrui Yin, Kin Wing Kwok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

High-temperature bismuth-layered piezoelectric ceramics (CaxSr1-x)Bi4Ti4O15have been prepared by the conventional solid reaction method. Our results reveal that there is a "phase transition induced by the composition" taking place in the solid solution at around x=0.4. During transition, the crystal structure changes from orthorhombic to pseudo-tetragonal and then back to orthorhombic. Although all (CaxSr1-x)Bi4Ti4O15(with any x value) undergo a second-order ferroelectric-to- ferroelectric phase transition at about 200°C below their Curie temperature, only the ceramic with x=0.4 exhibits a failure in piezoelectric properties during the transition. It is suggested that, on the basis of the X-ray photoelectron spectroscopy results, this material failure is induced by the high concentration of oxygen vacancies in the material during the phase transition.
Original languageEnglish
Pages (from-to)1317-1320
Number of pages4
JournalJournal of the American Ceramic Society
Volume89
Issue number4
DOIs
Publication statusPublished - 1 Apr 2006

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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