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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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

Shepherd, G. and Cochran, A. and Kirk, K.J. and McNab, A. (2002) 1-3 connectivity composite material made from lithium niobate and cement for ultrasonic monitoring at elevated temperatures. Ultrasonics, 40 (1). pp. 223-226. ISSN 0041-624X

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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.