Study of Structure and Conductive Characteristics in ZnO Ceramic

The ZnO ceramic and ZnO ceramic doped with LiOH were gotten by classical method at the temperature from 1 200 to 1 400℃ and by spark plasma sintering(SPS) method. The effects of additive contents, sintering temperature on resistive characteristics and microstructure on ZnO ceramic were studied by SEM and XRD. It was shown that ZnO powder is difficult to be ceramics below 1 400℃ by classical method. But the sintering temperature of SPS method is much lower than common sintering method. The crystal grain size and density of ZnO ceramics increase with increasing sintering temperature. And at the same sintering temperature, the resistivity of Li doped ZnO ceramics increase with the LiOH content.