ZnO Agglomeration and Its Effect on the Preparation of a Mixture for Production of Varistors by a Dopant Deposition Method

A suspension mixture for production of ZnO-based varistors is prepared by a dopant deposition method. The effect of deposition conditions (ZnO concentration in the suspension and the use of a thinning agent) on the density, ZnO grain size, and electrical characteristics of ceramics prepared from the deposited suspensions is studied. Properties of ceramics prepared by the suspension method are compared to those of ceramics prepared by conventional methods.