【作者】 胡珊； 沈上越； 戴雷； 晏海霞；

【Author】 HU Shan SHEN Shang-yue DAI Lei YAN Hai-xia (Faculty of Material Sci.and Chemistry Eng.,China University of Geosciences,Wuhan 430074,China)

【机构】 中国地质大学材料科学与化学工程学院；

【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。更多还原

【Abstract】 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 ⁴1am,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%.更多还原