| In order to abate the sintered temperature of piezoelectric ceramics and improve its complex capability, the material is doped by low melting point chemical compound PbO·WO3.As a result, ceramic materials can be sintered at 1100℃in liquid phase. This process is in favor of improving the densification of grain. In the paper, PZT-0.5%PbO·WO3 piezoelectric ceramic were prepared by using one-stage technique with solid oxides as raw materials. The effects of PbO·WO3 contents, Zr contents, sintering temperature, soaking time and polarize technology on properties of ceramic was studied. The results showed that pure perovskitic structure was obtained at calcination of 900℃for 2h. It exhibited a well-situated property at morphotropic phase boundary when Zr content is 0.52 and PbO·WO3 content is 0.5mol%. Pb1.05(Zr0.52,Ti0.48)O3-0.5mol%(5PbO·WO3) piezoelectric ceramic is sintered at 1110℃for 2h and polarized under 2500V/mm of electric field in 120℃for 30min.The optimized results ofε33T/ε0 (1593),tanδ(0.019),d33 (363PC/N), Kp (0.60),Qm (66),Ïv(5.65×1012Ω·cm) and Tc(361-367℃) were obtained. In comparison of the properties of PZT sintered at traditional temperature(1260℃), this experiment abate the sintering temperature and improve its complex capability. In the final paper, there have a profound research on the principle of low temperature sintering and improving properties.In the paper, XRD is used to analyze the lattice structure of synthetic power, SEM is used to observe the surface of the ceramic.
|
PDF Full Text Request