【摘 要】
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Background, Motivation and Objective In recent years, there is a growing demand of non-destructive testing (NDT) chemical plant safety assurance. NDT by ultrasound is usually carried out during operat
【机 构】
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Kumamoto University, Japan
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Background, Motivation and Objective In recent years, there is a growing demand of non-destructive testing (NDT) chemical plant safety assurance. NDT by ultrasound is usually carried out during operation shut down period. It is difficult to increase the operation shutdown frequency due to economic loss, thus it is desired to perform ultrasound NDT with operation condition. Some chemical plant temperature during operation can reach relatively high temperature such as 500℃ or even higher, even though it is very challenging conditions for ultrasonic transducers for NDT applications. In past experiments, performance of the PbTiO3 (PT)/ Pb(Zr,Ti)O3 (PZT) sol-gel composite ultrasonic transducers showed high sensitivity from room temperature to 400℃ hot plate heating though the maximum operation temperature was not determined yet.
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