Patent ID: 9236170
Filing Date: 2016-01-12
CPC Classification: H01C,Y10T

Claim Text:
1. A method for preparing a ZnO multilayer chip varistor with base metal inner electrodes, comprising the steps of: (1) adding oxides of manganese (Mn) and cobalt (Co) into a mixture of zinc oxide (ZnO) and bismuth oxide (Bi (2) mixing a dispersing agent, defoaming agent, solvent and binder with the powder, and then ball-milling to obtain a slurry; (3) tape-casting the slurry and cutting it, thereby obtaining one or more green sheets, using nickel (Ni) as a main material for base metal inner electrodes, and laminating, pressing and cutting the one or more green sheets into rectangles to obtain molded samples; (4) sintering the molded samples at a temperature of 850-1150 ° C. in a protective atmosphere, thereby obtaining a ceramic chip varistor; (5) coating both ends with silver electrode and performing heat treatment thereon in oxygen or air at a temperature of 500-800 ° C., thereby burning the Ag electrodes, and obtaining a ZnO multilayer chip varistor with the base metal inner electrodes.