Inner electrodes for multilayer varistors
Journal
International Journal of Applied Ceramic Technology
Journal Volume
6
Journal Issue
2
Pages
223-230
Date Issued
2009
Author(s)
Abstract
In the present study, Pt or AgPd metal is used as the inner electrode for Bi 2 O 3 ‐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 Bi 2 O 3 ‐doped ZnO. The Bi 2 O 3 could react with Pd to form PdBi 2 O 4 . The Bi 2 O 3 ‐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.
Type
journal article