Effect of Zr/Ti Ratio Content on Some Physical Properties of Low Temperature Sintering PZT−PZN−PMnN Ceramics

Abstract

Low -temperature sintering of 0.8Pb(ZrxTi1-x))O3 - 0.125Pb(Zn1/3Nb2/3)O3 - 0.075Pb(Mn1/3Nb2/3)O3 + 0.7 % wt Li2CO3 (PZT-PZN-PMnN) ceramics was prepared by using Li2CO3 as the sintering aid. Their structure and physical properties were investigated according to the Zr/Ti rat io content. Fro m X-ray diffract ion patterns showed that samples formed a phase perovskite structure without secondary phases. The electro mechanical coupling factor (k p), the maximu m d ielectric constant (emax), the piezoelectric constant (d31) and the mechanical quality factor (Qm) increased with the increase of Zr/Ti ratio content and reaches to the highest value at the ratio content of Zr/Ti = 48/52. At this ratio content, the ceramic has the optimal electro mechanical p roperties: the emax = 19500, the k p = 0.62, the d31 = 140 p C/N and the Qm = 1112.