MnO2对BiFeO3掺杂PZT-PFW-PMN陶瓷的电性能与温度特性研究

Piezoelectric Characteristics of Low-temperature Sintered BiFeO_3-doped PZT-PFW-PMN Ceramics with the Addition of MnO_2

采用传统工艺制备了PbZrO_3-PbTiO_3-Pb(Fe_(2/3)W_(1/3))O_-Pb(Mn_(1/3)Nb_(2/3))O_3-BiFeO_3(简称PZT-PFW-PMN-BF)四元系压电陶瓷.研究了MnO_2掺杂对PZT-PFW-PMN-BF陶瓷的显微结构、烧结温度、电性能与温度稳定性的影响.结果表明,当MnO_2的掺杂量为0.10 wt%时,陶瓷的烧结温度从1020℃降到了950℃,并得到了较好的综合性能和温度特性,分别为d_(33)=394 pC/N,K_p=0.54,Q_m=1180、ε_r=1480,△f_r/f_(r25℃)=1.68%和△K_p/K_(p25℃)=-1.06%.

The effects of MnO2 addition on the sintering temperature, microstructure, dielectric, piezoelectric properties and the temperature stability of PbZrO3-PbTiO3-Pb（Fe2/3W1/3）O3-Pb（Mn1/3Nb2/3）O3-BiFeO3 （PZT-PFW- PMN-BF） ceramics were investigated. The 0.10 wt% MnO2-added PZT-PFW-PMN ceramics sintered at 950℃ exhibited the favorable piezoelectric and dielectric properties, which were listed as follows： p=7.78 g/cm^3, d33=394 pC/N, kp=0.54, Qm=1180, εr=1480, △fr/fr25℃=1.68 % and △Kp/Kp25℃=-1.06 %, respectively.