Patent ID: 6224937
Filing Date: 2001-05-01
Classification: H01C

Abstract:
A method of manufacturing a zinc oxide varistor comprising the steps of:applying an additive including an aqueous binder solution and a metal oxide on an outer surface of a molded material containing a zinc oxide as a principal ingredient;sintering the molded material to obtain a sintered body; andheating the sintered body in a temperature range of not less than 500.degree. C. and not more than 600.degree. C.,wherein the aqueous binder solution contains one selected from the group consisting of polyvinyl alcohol, methyl cellulose, hydroxypropyl cellulose, and water-soluble acryl by 2.5 to 15% by weight, and the metal oxide is added in the aqueous binder solution so that a solid matter ratio is 15 to 60% by weight.