Electrical resistors – Granular or powdered element
Patent
1991-02-28
1993-01-26
Lateef, Marvin M.
Electrical resistors
Granular or powdered element
338 20, 338 21, H01C 800, H01C 710
Patent
active
051825406
ABSTRACT:
A resistor element includes a hollow cylindrical sintered body and a pair of electrodes formed on the upper and lower surfaces of the sintered body. The sintered body contains ferrite as a main constituent and contains 0.05 to 10% by volume of an insulator phase formed at the crystal grain boundary of the ferrite crystals. An insulating layer is formed to cover the side surface of the sintered body. The sintered body contains an oxide material selected from the group consisting of 0.005 to 2.0% by weight of bismuth oxide calculated in terms of Bi.sub.2 O.sub.3, 0.01 to 3.0% by weight and 0.005 to 2.0% by weight of silicon oxide and aluminum oxide calculated in terms of SiO.sub.2 and Al.sub.2 O.sub.3 respectively, and 0.01 to 3.5% by weight and 0.001 to 1.6% by weight of silicon oxide and calcium oxide calculated in terms of SiO.sub.2 and CaO, respectively.
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World Patents Index Latest, 83-40049K, Sep. 10, 1981, & JP-A-58-045160, Mar. 16, 1983.
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Goto Yoshiko
Horiguchi Akihiro
Imai Motomasa
Kasori Mitsuo
Shuto Naoki
Kabushiki Kaisha Toshiba
Lateef Marvin M.
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