Abstract
Effect of sintering atmosphere on maximum energy capability of Pr-doped ZnO varistor has been studied. Distribution of electrical property and microstructure in ZnO varistor has been obtained with sliced sample. It is shown that donor density and interface states density increased with N2-Air sintering, and there is the close relationship between distribution of electrical property of grain boundary and maximum energy capability. Segregation of Pr and Cr at triple point was different with sintering atmosphere. The composition of segregation phase was Pr-rich PrCrO3, Pr4O7 and Pr2O3 with N2-Air sintering.
