1-3 connectivity composite material made from lithium niobate and cement for ultrasonic monitoring at elevated temperatures

G. Shepherd, A. Cochran, K.J. Kirk, A. McNab

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We have designed, manufactured and tested a piezoelectric composite material to operate at temperatures above 400 oC. The material is a 1-3 connectivity composite with pillars of Z-cut lithium niobate in a matrix of alumina cement. The composite material produced shorter pulses than a monolithic plate of lithium niobate and remained intact upon cooling. Results are presented from room temperature and high temperature testing. This material could be bonded permanently to a test object, making it possible to carry out condition monitoring over an extended period. A new excitation method was also developed to enable remote switching between array elements.
Original languageEnglish
Pages (from-to)223-226
Number of pages3
JournalUltrasonics
Volume40
Issue number1
DOIs
Publication statusPublished - 2002

Keywords

  • composites
  • elevated temperatures
  • condition monitoring
  • ultrasonic monitoring

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