【摘要】 实验选取一种性能较好的二元系锆钛酸铅(PZT)压电陶瓷配方,通过测试PZT陶瓷样品在强场下的介电性能表明,随着外加电场强度的增大,样品介温曲线的斜率变小;材料的介电损耗随着外加电场的增大而增大,当外加电场从0升至400 V/mm时,介电损耗从0.16%增至0.38%,损耗仍在较小范围内,可见本材料较适合作为大功率压电材料在强场下应用。对其强场效应及损耗机理进行了初步探讨。更多还原

【Abstract】 A kind of binary system piezoelectric ceramic with good properties was selected to measure its dielectric proprties of the PZT samples at high electrical field.The experimental results showed that with the increace of electrical field,the slope of dielectric constant-temperature curve became smaller,implying that the temperature stability of dielectric constant became better.The dielectric loss increaseed when the electrical field increased,and it changed from 0.16% to 0.38% as the electrical field changed from 0 to 400 V/mm.Although dielectric loss became bigger,it was still a small value.So the material discussed in this paper was suitable for the application of high-power piezoelectric ceramics at high electrical field.The high electrical field effect and dielectric loss mechanics were preliminarily discussed in this paper.更多还原