高压电常数PZT-PNN-PSN-PMW压电陶瓷的制备及性能研究

Microstructure and Enhanced Piezoelectric Properties of PZT-PNN-PSN-PMW Ceramic

摘要: 随着采用传统的固相反应制备了Pb_0.92Sr_0.08(Zr_0.48Ti_0.52)_0.96-x(Ni_1/3Nb_2/3)_x(Sb_1/3Nb_2/3)_0.03(Mg_1/2W_1/2)_0.01O₃压电陶瓷（简称PZT-PNN-PSN-PMW）。通过XRD、SEM、阻抗分析仪等研究了PNN含量对陶瓷相结构、显微结构、介电性能和压电性能的影响。结果表明,制备出了纯钙钛矿结构的PZT-PNN-PSN-PMW压电陶瓷,随着PNN含量的减少,其相结构由三方相向四方相转变。当x=0.2时,在1280℃烧结的压电陶瓷具有最优的电学性能,其压电常数d₃₃、机电耦合系数k_p、介电常数ε_r、居里温度T_c分别为电学性能为:1035pC/N、83.4%、7895和122℃.

Abstract: Pb_0.92Sr_0.08(Zr_0.48Ti_0.52)_0.96-x(Ni_1/3Nb_2/3)_x(Sb_1/3Nb_2/3)_0.03(Mg_1/2W_1/2)_0.01O₃ piezoelectric ceramic（abbreviated as PZT-PNN-PSN-PMW） were synthesized by traditional solid-state reaction method. The effects of PNN content on phase structure, dielectric, piezoelectric properties of the ceramics were investigated in detail. The X-ray resulted that PZT-PNN-PSN-PMW ceramics are a pure perovskite structure without any other second phases, and their crystals structure transform from rhombohedral to tetragonal with decreasing PNN content. The piezoelectric ceramics with x=0.2 sintered at 1280℃ exhibited the favorable electrical properties, which were listed as follows: d₃₃=1035 pC/N,k_p=83.4%,ε_r=7895, T_c=122℃.