High Temperature Gallium Orthophosphate Transducers for NDT
نویسندگان
چکیده
منابع مشابه
High Temperature Integrated and Flexible Ultrasonic Transducers for NDT
Integrated (IUTs) and flexible ultrasonic transducers (FUTs) are presented for NDT at high temperatures. These transducers are made of sol-gel sprayed piezoelectric thick (> 40μm) ceramic films. The ceramic materials are lead-zirconate-titanate, bismuth titanate and lithium niobate which are for thickness measurement up to 150°C, 400°C and 800°C, respectively. The IUT can be also deposited onto...
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We have investigated the spatial dependence of the longitudinal piezoelectric stress constant e of PVF . Experiments were performed on a series of no.minally identical brass-backed PVF longitudinaF wave t~ansducers in water using commercial PVF7 film. Computer programs were designed t6 predict the performance of the transducers as a function of e (Z) , the thickness mode piezoelectric stress co...
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Flexible ultrasonic transducers (FUTs) consisting of a 75 μm thick metal membrane, a piezoelectric composite with a thickness larger than 85 μm and a top electrode were developed for structural health monitoring (SHM) and non-destructive testing (NDT) applications. The piezoelectric films were made by a sol-gel spray technique. Its ultrasonic performance in terms of signal strength is at least ...
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The problems of development of high-temperature ultrasonic transducers for modern science and technology applications are analysed. More than 10 piezoelectric materials suitable for operation at high temperatures are overviewed. It is shown that bismuth titanate based piezoelectric elements are most promisable. Bonding methods of piezoelectric elements to a protector and backing are discussed. ...
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ژورنال
عنوان ژورنال: Procedia Engineering
سال: 2016
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2016.11.322