Abstract
With a new concept of reducing the spinel particles in ZnO varistor ceramics (ZVC), the molar ratio of Sb2O3 (MS) / Bi2O3 (MB) and the effect of the sintering temperature (TS) on densification behavior were investigated. Based on these experimental results, four types of spinel-reduced ZnO varistor ceramics (SRZVC) were fabricated to investigate the effect of transition elements such as Ni and Cr on electric stability of the resistive leakage current (Ir). These experiments revealed that electric stability of Ir depended on the contained transition elements, and was influenced by the segregating of transition elements in spinel particles.
