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一、聚偏氟乙烯薄膜性能特点 聚偏氟乙烯(以下称为PVDF)薄膜为一种新型压电材料,在水声、超声、电声等领域中可与现有的PZT压电陶瓷取长补短,是压电材料领域新添的一员。 自从五十年代PZT压电陶瓷问世以来,三十多年中它始终在换能器材料中占主导地位,尽管PZT作为压电材料有着无可比拟的优点,但也存在着由陶瓷固有性能所带来的缺点和在换能器设计上的不便之处,如陶瓷的高密度和易碎性使大于10cm的水听器太厚、太重,而薄的器件
First, the polyvinylidene fluoride film performance characteristics Polyvinylidene fluoride (hereinafter referred to as PVDF) film is a new type of piezoelectric materials, in water acoustics, ultrasound, electro-acoustic and other fields with the existing PZT piezoelectric ceramics complement each other, Is a new addition to the field of piezoelectric materials. Since the advent of PZT piezoelectric ceramics in the 1950s, it has always dominated the transducer materials for over thirty years. Although PZT has unparalleled advantages as a piezoelectric material, Disadvantages and inconveniences in the design of transducers, such as the high density and brittleness of ceramics, make hydrophones larger than 10 cm too thick and too heavy, while thin devices