Abstract
In the present study, Pt or AgPd metal is used as the inner electrode for Bi2O3‐doped ZnO multilayer varistors (MLV). The growth of the ZnO grains is constrained by the presence of the inner electrodes. The Pt inner electrodes are chemically inert to Bi2O3‐doped ZnO. The Bi2O3 could react with Pd to form PdBi2O4. The Bi2O3‐rich liquid also tends to wet the AgPd electrode. The size of ZnO grains in the MLV/AgPd specimen is larger. The ZnO grains in the MLV/AgPd specimen can even grow to a size larger than the layer thickness at the expense of electrode continuity.
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