Title: Oxidate electric resistance
Application Number: 85105495 Application Date: 1985.07.18
Publication Number: 1007492 Publication Date: 1987.01.21
Approval Pub. Date: 1990.09.26 Granted Pub. Date: 1990.09.26
International Classifi-cation: H01C7/10;H01C7/12
Applicant(s) Name: Hitachi Ltd. JP) Address:
Inventor(s) Name: Yamazaki Takeo et al. JP)
Attorney & Agent: LIU HUI
Abstract:
    A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains and which of zinc oxide between the individual crystal grains has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller resistance-temperature coefficient, and a small percent change in resistivity after heat treatment at 500 DEG C in the atmosphere.
Time: 19
<- Previous Patent:Composites with low ohmic value   |  Next Patent:Adjustable liquid rheostat with c... ->