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