GB1312143A - Electrical resistors - Google Patents

Electrical resistors

Info

Publication number
GB1312143A
GB1312143A GB1312143DA GB1312143A GB 1312143 A GB1312143 A GB 1312143A GB 1312143D A GB1312143D A GB 1312143DA GB 1312143 A GB1312143 A GB 1312143A
Authority
GB
United Kingdom
Prior art keywords
oxide
july
varistor
electrodes
nickel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1312143A publication Critical patent/GB1312143A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/105—Varistor cores
    • H01C7/108—Metal oxide
    • H01C7/112—ZnO type

Abstract

1312143 Varistors MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 2 July 1970 [2 July 1969(2) 4 July 1969(3) 1 Sept 1969(6)] 32182/70 Heading H1K A varistor comprises a sintered body consisting principally of zinc oxide with 0À05- 10 mol per cent of iron oxide and 0À05-10 mol per cent of one of the group comprising nickel oxide, titanium oxide, magnesium oxide, manganese oxide, chromium oxide, cobalt oxide, barium oxide, strontium oxide, beryllium oxide, cadmium oxide and lead fluoride, and has a plurality of electrodes, at least one of which contains silver. The silver-containing electrodes are applied in the form of paint and also contain small proportions of boric oxide, silicon dioxide, cobalt oxide or manganese oxide, and bismuth oxide or lead oxide. Other electrodes may be of aluminium or nickel. The varistor is embedded or coated in epoxy or phenol resin. Examples of varistor compositions and methods of preparing these compositions are given
GB1312143D 1970-07-02 1970-07-02 Electrical resistors Expired GB1312143A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3218270 1970-07-02

Publications (1)

Publication Number Publication Date
GB1312143A true GB1312143A (en) 1973-04-04

Family

ID=10334570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1312143D Expired GB1312143A (en) 1970-07-02 1970-07-02 Electrical resistors

Country Status (1)

Country Link
GB (1) GB1312143A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years