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

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=1035pC/N, k_p=83.4%, ε_r=7895, T_c=122℃.