HERSTELLUNG EINES SPANNUNGSABHAENGIGEN, NICHT LINEAREN WIDERSTANDES.

摘要

A voltage non-linear resistor excellent in varistor voltage characteristics,lightning discharge current withstanding capability and life performance against applied voltage comprises a disclike voltage non-linear element and a thin insulating covering layer integrally provided on the side surface of said element. In the resistor according to the invention, said element comprises zinc oxides as main ingredient, 0.1-2.0% bismuth oxides, as Bi2O3, 0.1-2.0% cobalt oxides, as Co2O3, 0.1-2.0% manganese oxides, as MnO2, 0.1-2.0% antimony oxides, as Sb2O3, 0.1-2.0% chromium oxides, as Cr2O3, 0.1-2.0% nickel oxides, as NiO, 0.001-0.05% aluminum oxides, as Al2O3, 0.005-0.1% boron oxides, as B2O3, 0.001-0.05% silver oxides, as Ag2O and 7-11% silicon oxides, as SiO2, and said layer comprises 45-60% silicon oxides, as SiO2, 30-50% zinc oxides, as ZnO, 1-5% bismuth oxides, as Bi2O3 and antimony oxides for the remainder (% stands for mole %). The resistor of the invention preferably further comprises a thin glassy layer superimposed on the insulating covering layer. The resistors are advantageously adaptable to arrestors, surge absorbers used in high voltage power systems.