1–3 connectivity composite material made from lithium niobate and cement for ultrasonic condition monitoring at elevated temperatures
✍ Scribed by G. Shepherd; A. Cochran; K.J. Kirk; A. McNab
- Book ID
- 104263505
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 299 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0041-624X
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✦ Synopsis
We have designed, manufactured and tested a piezoelectric composite material to operate at temperatures above 400 degrees C. 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.