PZN-PZT压电陶瓷及其PVDF压电复合材料的制备和性能

PREPARATION AND PROPERTIES OF PZN-PZT PIEZOELECTRIC CERAMICS AND PZN-PZT/PVDF PIEZOELECTRIC COMPOSITES

采用固相烧结法合成了 PZN- PZT(铌锌锆钛酸铅 )三元系压电陶瓷烧结块材和粉末 ,并采用 XRD、SEM等测试方法对其结构和性能进行了分析。PZN- PZT常压烧结陶瓷具有优良的压电性能 ,PZN- PZT颗粒粒径在 0 .5～ 4 μm之间 ,颗粒形态不太规整。采用溶液共混法将 PZN- PZT粒子均匀分散于 PVDF基体中 ,制备了 PZN- PZT/PVDF0 - 3型压电复合材料。研究了 PZN- PZT质量分数、极化电场等因素对该压电复合材料压电和介电性能的影响。实验结果表明 ,选用压电活性更高的压电陶瓷粉末进行复合 ,可有效提高压电复合材料的压电性能。增加 PZN-PZT质量分数。

Ternary system piezoelectric ceramic materials PZN PZT [Pb 0.955 La 0.03 (Zn 1/3 Nb 2/3 ) 0.3 Zr 0.37 Ti 0.33 O 3] and their powders were fabricated using solid state sintered technology. Their structure and properties were studied by XRD and SEM. PZN PZT ceramics synthesized by the traditional sintered method contain well piezoelectric properties. The diameters of PZN PZT powders are between 0.5~4μm, and the shape is irregular. PZN PZT particles were incorporated into PVDF polymer matrix homogeneously through solution blended process to form PZN PZT/PVDF 0 3 composite thin films. The effects of the ceramic mass fraction and poling electric field on the piezoelectric and dielectric properties of the piezoelectric composites were studied. The results show that the piezoelectric properties of the composites could be improved effectively through choosing the ceramics containing better piezoelectric properties as the filler. The same effects can be made with the increasing of PZN PZT mass fraction and poling field.