By B. Tocquet (auth.), Dr. Bernard F. Hamonic, Dr. Jean-Nöel Decarpigny, Dr. Oscar B. Wilson (eds.)

Power Transducers for Sonics and Ultrasonics ways all facets of high-power difficulties in electroacoustic transducers. The eighteen lectures contained during this ebook specialise in themes in sonar and macrosonic transducer layout, new fabric advancements for transducers, transducer modelling, and tool electronics. attainable destiny tendencies and advancements are defined.

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Extra info for Power Transducers for Sonics and Ultrasonics: Proceedings of the International Workshop, Held in Toulon, France, June 12 and 13, 1990

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The piezoelectric materials generally used are piezoelectric ceramics. It can be shown that piezoceramics present the highest electromechanical conversion and efficiency. and have. in general terms. 2). At present. the most suitable and popular ceramic materials are lead zirconate titanates (PZT). various commercial versions of which are manufactured In different countries. The leading position of the PZT ceramics is due to their strong piezoelectric effect and high Curie point. as well as to the wide range of properties which they offer by changing slightly their composition.

Gas removal from high-temperature metal and glass melts by using high-power ultrasonics is a process which has been demonstrated, but which is still under study. Degassing of carbonated drinks, photographic solutions and other liquids has been more successful in Industry. Ultrasonic cleaning tanks working within a range of 20 to 40 kHz are normally used. Macrosonlcs In gases Is the least exploited field of application. This was due to the lack of efficient gasborne transducers. 18), drying, separation of gaseous mixtures, pest control, sterilization, etc.

J. N. 729-739 (1987). T. E. M. Harris, 'A New Piezoelectric Transducer for Hole-toHole Seismic Applications: Presented at the 58th Annual International Meeting of the Society of Exploration Geophysicists, Anaheim, California, (1988). w. H. 1308-1314 (1982). E. Hornby, 'Imaging of Near-Borehole Structure with the Array Sonic Tool: Presented at the 58th Annual International Meeting of the Society of Exploration Geophysicists, Anaheim, California, (1988). 9 D. Ellis, Well Logging for Earth Scientists, (Elsevier, New-York, 1987).

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