【摘 要】
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Background, Motivation and Objective Nowadays air-coupled ultrasonic techniques are increasingly used for non-destructive evaluation. The biggest problem is big losses of ultrasonic signals mainly due
【机 构】
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Ultrasound Institute of Kaunas University of Technology, Lithuania
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Background, Motivation and Objective Nowadays air-coupled ultrasonic techniques are increasingly used for non-destructive evaluation. The biggest problem is big losses of ultrasonic signals mainly due mismatch of acoustic impedances of ultrasonic transducers and air. One of the ways to solve this problem is application of novel more efficient piezoelectric materials like PMN-PT type crystals. The objective of this research was development of air-coupled ultrasonic transducers and arrays with PMN-32％ PT crystals.
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