镧掺杂PZN-PZT陶瓷及其PVDF压电复合材料的制备与性能  

Preparation and properties of La-doped PZN-PZT ceramics and PZN-PZT/PVDF piezoelectric composites

作　　者：胡珊[1] 沈上越[1] 戴雷[1] 晏海霞[1] 

机构地区：[1]中国地质大学材料科学与化学工程学院,湖北武汉430074

出　　处：《功能材料》2007年第A02期748-750,共3页Journal of Functional Materials

基　　金：国土资源部开放实验室资助项目（MGMR200118）.

摘　　要：采用固相烧结法合成了不同镧掺杂量的PZN-PZT压电陶瓷和粉体．并用XRD分析了陶瓷的晶相，扫描电镜观察到PZN-PZT陶瓷粉体形态不太规整，颗粒粒径主要分布在1～4μm之间．将PZN-PZT粒子均匀分散于PVDF基体中，制备了PZN-PZT/PVDF压电复合材料．研究了镧掺杂量对PZN-PZT陶瓷及复合材料压电性能的影响．结果表明，适量的镧掺杂可有效提高复合材料的压电性能，当镧掺杂量为4％（摩尔分数）时，复合材料的压电性能最好，压电常数d33值为36pC/N。The La-doped PZN-PZT ceramics and their powders were fabricated using solid state sintered technology. Their crystal phase was studied by XRD. The diameters of PZN-PZT powders were mostly between 1-4μm, and the shape was irregular by SEM. The PZN-PZT/PVDF composites were made through incorporated PZN-PZT power into PVDF polymer matrix. The effects of the La content on the piezoelectric properties of PZN-PZT ceramics and the piezoelectric composites were studied. The results indicated that piezoelectric properties of the composites could effectively increase with appropriate La content. The piezoelectric constant d33 of piezoelectric composites reached maximum and the d33 was 36pC/N when the La content was 4mol%.

关 键 词：镧掺杂 PZN-PZT PVDF 压电复合材料 

分 类 号：TM282[一般工业技术—材料科学与工程] O614.331[电气工程—电工理论与新技术]