Sol-gel fabricated thick film broadband piezoelectric ultrasonic transducers (UTs) operating at a frequency below 10 MHz are presented. The UTs are formed using thick PZT and LiNbO/sub 3/ films which are ceramic-ceramic composites formed by dispersing PZT and LiNbO/sub 3/ particles in a PZT and LiNbO/sub 3/ sol-gel solution, respectively. Films are directly deposited on stainless steel substrates. Excellent broadband signals have been experimentally obtained with piezoelectric PZT and LiNbO/sub 3/ films with 1 cm diameter and a thickness between 40-50 /spl mu/m.
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机译:提出了在低于10 MHz的频率下工作的溶胶-凝胶法制备的厚膜宽带压电超声换能器(UT)。使用厚的PZT和LiNbO / sub 3 /膜形成UT,这是通过分别将PZT和LiNbO / sub 3 /颗粒分散在PZT和LiNbO / sub 3 /溶胶-凝胶溶液中形成的陶瓷陶瓷复合材料。薄膜直接沉积在不锈钢基材上。用压电PZT和LiNbO / sub 3 /膜通过实验获得了出色的宽带信号,该膜的直径为1 cm,厚度在40-50 / spl mu / m之间。
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