Effect of Nonstoichiometric Pb Content on the Properties of PZT Ceramics

The effect of nonstoichiometric Pb content on the properties of PZT has been studied. The samples of PbxBa0.04(Li1/4Sb3/4)(0.02)(Zr0.52Ti0.48)(0.98)O-3 (0.94 <= x <= 0.98) were prepared by the solid state route and sintered at 1200 degrees C. The Pb content changed from 0.94 to 0.98. The result shows that when the Pb content deviates from the stoichiometric ratio (x=0.96), the grain growth and densification of ceramics are promoted. The phases analysis shows that ZrO2 phase is detected when the amount of Pb is lower than 0.96, while when the Pb content is more than 0.96, the PbO phase is absent. The optimum composition of PbxBa0.04(Li1/4Sb3/4)(0.02)(Zr0.52Ti0.48)(0.98)O-3 solid solution system are obtained when x is 0.95, and the epsilon(T)(33)/epsilon(0), d(33) and k(p) of the PZT ceramics are: 2281, 516 pC/N and 0.80, respectively.