压电陶瓷/硫铝酸钡钙矿物复合材料的压电性能

Fabrication and Piezoelectric Properties of Ceramic-Ba-bearing Calcium Sulfoaluminate Minerals Composites

采用压制成型法,以硫铝酸钡钙水泥矿物为基体制备了0-3型压电复合材料。分析讨论了铌锂锆钛酸铅(PLN)质量含量对压电复合材料压电性能的影响。结果表明,在极化工艺参数为:极化电场强度为5 kV/mm;极化时间为20 min;极化温度为80℃的条件下,以硫铝酸钡钙水泥矿物作为基体的压电复合材料的相对介电常数rε和压电应变常数d33随着PLN质量含量的增加非线性增长,其值接近立方体模型理论值,随着PLN质量含量的增加,平面和厚度伸缩机电耦合系数Kp、Kt增大。

The 0 - 3 cement - based piezoelectric composites were fabricated by compressing technique. When the polarizing electric field intensity E, polarizing time t and polarizing temperature T were 5.0 kV/mm,20 min and 80 ℃, respectively, the piezoelectric constant d33, the relative dielectric constant εr and the electromechanieal coupling eoeffieient Kp and Kt of the composites all increased with the increase of PLN content.