Patent ID: 6334964
Filing Date: 2002-01-01
Classification: C01G,C01P,C04B,H01C

Abstract:
A thixotropic ink for use in manufacturing ceramic of a zinc oxide varistor, said ceramic containing zinc, oxygen and a plurality of additive elements, said ink comprising a suspension in an organic liquid of a calcined particulate material containing zinc, oxygen and a plurality of said additive elements, said calcined particulate material being formed by(a) calcining a mixture of powders of zinc oxide and said additive elements to form a calcined product having a particle size larger than particle size of said powders, and thereafter (b) reducing the particle size of said calcined product to produce said calcined particulate material; wherein said powders have an average particle size of about 0.25 microns or less, and an average particle size of the calcined product produced by calcining is greater than 2.0 microns.