公开(公告)号：US4996510A

公开(公告)日：1991-02-26

申请号：US447748

申请日：1989-12-08

Applicant: Paul Becker ,  Carol Powers ,  Mark S. Thompson

Inventor： Paul Becker ,  Carol Powers ,  Mark S. Thompson

IPC: H01C7/10 ,  H01C7/108 ,  H01C7/112 ,  H01C17/00

CPC classification number: H01C7/108 ,  H01C7/112 ,  Y10T29/49082

Abstract: A varistor comprises a primary varistor metal oxide, aluminum in an amount of about 1 to about 30 parts per million (ppm), about 0.1 to about 0.5 mole % bismuth, about 0.1 to about 1.5 mole % antimony, about 0.1 to about 1 mole % chromium, about 0.1 to about 1.0 mole % manganese, about 0.1 to about 2.0 mole % cobalt, and about 0 to about 1.0 mole % boron. Each of these elements is present in the form of its oxide and the varistor has a DC leakage current at 80% of V.sub.1ma/cm.spsb.2 of less than 1.0.times.10.sup.-7 amp/cm.sup.2.

Abstract translation: 压敏电阻包括初级可变电阻金属氧化物，铝的量为约1至约30ppm（ppm），约0.1至约0.5摩尔％的铋，约0.1至约1.5摩尔％的锑，约0.1至约1摩尔 约0.1至约1.0摩尔％的锰，约0.1至约2.0摩尔％的钴和约0至约1.0摩尔％的硼。 这些元件中的每一个以其氧化物的形式存在，并且变阻器具有小于1.0×10 -7安培/ cm 2的V1ma / cm 2的80％的DC泄漏电流。