镧掺杂对PZN基陶瓷的电致应变和电滞后的影响

The Effect of Lanthanum doping on the Electrostriction and Electric Hysteresis of Pb(Zn_(1/3)Nb_( 2/3))O_3 based Ceramics

用二次合成法制备了掺镧的 PZN基多元系陶瓷并研究了镧掺杂对该体系陶瓷的相结构、介电、电致伸缩性能及电滞回线的影响。实验结果表明 :随着镧含量的增加 ,陶瓷的钙钛矿相含量、介电常数、纵向及横向电致应变和电致伸缩系数减小 ,电滞后效应降低即剩余极化和矫顽场强减小 ,陶瓷的介电性能的温度稳定性也得到了改善。

WT5BZ]La doped 0 85Pb(Zn 1/3 Nb 2/3 )O 3 0 10BaTiO 3 0 05PbTiO 3 ternary ceramics were synthesized by the columbite method The effect of La doping on phase structure,dieletric constant, electrostrictive properties and electric hysteresis of PZN based ceramics were investigated With lanthnum content increasing, the content of perovskite phase and dielectric constant decreased, and meanwhile dielectric temperature stability improved With the increment of lanthanum content, the electrostriction and electrostrictive coefficients decreased, and at the same time the strain and electric hysteresis decreased, i e , remanent strain, remanent polarization and coercive fields decreased