Bismuth titanate fabricated by spray-on deposition and microwave sintering for high-temperature ultrasonic transducers

Clifford T. Searfass, C. Pheil, K. Sinding, B. R. Tittmann, A. Baba, D. K. Agrawal

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Thick films of ferroelectric bismuth titanate (Bi4Ti3O12) have been fabricated by spray-on deposition in conjunction with microwave sintering for use as high-temperature ultrasonic transducers. The elastic modulus, density, permittivity, and conductivity of the films were characterized. Electro-mechanical properties of the films were estimated with a commercial d33 meter which gave 16 pC/N. This value is higher than typically reported for bulk bismuth titanate; however, these films withstand higher field strengths during poling which is correlated with higher d33 values. Films were capable of operating at 650 °C for roughly 5 min before depoling and can operate at 600 °C for at least 7 days.

Original languageEnglish (US)
Article number7330039
Pages (from-to)139-146
Number of pages8
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Volume63
Issue number1
DOIs
StatePublished - Jan 2016

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All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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