Piezoelectric ceramics - piezoelectric polymer compound material and making method

Abstract

The present invention relates to a 0-3 type piezoelectric composite material with intensified piezoelectric property for ultrasonic transducer, underwater sound transducer and medical ultrasonic detector and its production method. It is characterized by adopting multi-stage polarization method at the different temperatures to polarize 0-3 type piezoelectric composite material, i. e. firstly, polarizing piezoelectric ceramics being in 0-3 type piezoelectric composite material under the condition of higher than curie temperature of polymer, and then reverse polarizing piezoelectric polymer being in 0-3 type piezoelectric composite material under the condition of lower than curie temperature of polymer so as to implement intensification of piezoelectric property after two phases are combined. 本发明涉及一种用于超声换能器、水声换能器和医用超声探测器的具有增强的压电性能的０—３型压电复合材料，本发明还涉及制造这种复合材料的方法。本发明方法的特征在于采用在不同的温度下多段极化方法极化０—３型压电复合材料。即，先在高于聚合物的居里温度下极化０—３型压电复合材料中的压电陶瓷，然后在低于聚合物的居理温度下反相极化０—３型压电复合材料中的压电性聚合物，从而实现两相复合后的压电性能的增强。