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AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsHideyuki Kanai, Takashi Takahashi, Motomasa Imai, Osamu Furukawa, Hiroshi Endo, Osamu Hirao, Masaru Hayashi
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A metal oxide varistor is disclosed which a component of grain bodies comprised of zinc oxide and a component of grain boundary layers comprised of another metallic oxide, containing metal other than zinc wherein at least a portion of these starting materials comprised a fine particle powder prepared by a co-precipitatin method. The metal oxide varistor of the present invention is excellent in varistor characteristics such as non-linearity to voltage, life performances and capability of energy dissipation, is small in a scatter of the above characteristics between manufacture lots or within each lot at the time of manufacture, and has a good quality stability. Unexpected results are obtained when the co-precipitated fine particles are subjected to a refrigeration-dehydration type process.
A metal oxide varistor comprising a component of grain bodies comprised of zinc oxide and a component of grain boundary layers comprised of at least one metallic oxide containing metal other than zinc, wherein at least a portion of at least one of said zinc oxide and said metallic oxide comprises a fine particle powder prepared by a co-precipitation method consisting essentially of the steps of
A process for manufacturing a metal oxide varistor, consisting essentially of the steps of
A fine particle powder consisting essentially of metallic oxides, formed by a co-precipitation method consisting essentially of the steps of
Dependencies are inferred from the claim text.