Industrial applications of piezoelectric polymer transducers

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Abstract
The discovery of highly active piezoelectric polymer materials was first reported in 1969. Since then an enormous amount of research work has been conducted, mainly aimed at discovering the structure and properties of these fascinating materials with the further aim of improving their piezoelectric and pyroelectric behaviour. An equally vast amount of literature devoted to applications of these polymers has appeared and even a cursory glance at all this shows that they have been applied as the basis for a wide range of devices. The subject has now reached a degree of maturity and in the nondestructive testing field, there is perhaps a 'niche market' emerging for transducers based on polyvinylidene fluoride and its derivatives. In certain areas such as miniature under water hydrophones, piezoelectric polymers have become the material of choice. This being so, it is appropriate to review the subject.

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