SE7614699L - METAL OXIDE VARISTOR - Google Patents

METAL OXIDE VARISTOR

Info

Publication number
SE7614699L
SE7614699L SE7614699A SE7614699A SE7614699L SE 7614699 L SE7614699 L SE 7614699L SE 7614699 A SE7614699 A SE 7614699A SE 7614699 A SE7614699 A SE 7614699A SE 7614699 L SE7614699 L SE 7614699L
Authority
SE
Sweden
Prior art keywords
ppm
weight
oxide
metal
voltage
Prior art date
Application number
SE7614699A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
L M Levinson
H F Ellis
H Fishman
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of SE7614699L publication Critical patent/SE7614699L/en

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Metal-oxide varistor compositions having a characteristically low voltage drop and low leakage current contain a reaction product which is produced by sintering a mixture of zinc oxide, bismuth oxide and other metal oxides and by the addition of 0.5 to 500 ppm by weight of aluminium or 0.1 to 500 ppm by weight of gallium, or a maximum of 100 ppm by weight of a mixture of both. Metal-oxide varistors manufactured from this composition exhibit a ratio of the voltage for producing a current intensity of 2.7 x 10<2>A cm<-2> to the voltage which produces a current density of 1.33 x 10<-4>A cm<-2> of 1.9:1 or less. Overvoltage suppressors which are produced using this material require no series-connected spark gap, as is otherwise normal.
SE7614699A 1975-12-31 1976-12-29 METAL OXIDE VARISTOR SE7614699L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64578875A 1975-12-31 1975-12-31

Publications (1)

Publication Number Publication Date
SE7614699L true SE7614699L (en) 1977-07-02

Family

ID=24590488

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7614699A SE7614699L (en) 1975-12-31 1976-12-29 METAL OXIDE VARISTOR

Country Status (6)

Country Link
JP (1) JPS5292398A (en)
AU (1) AU504734B2 (en)
BR (1) BR7608811A (en)
CH (1) CH630487A5 (en)
DE (1) DE2657805A1 (en)
SE (1) SE7614699L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019889A1 (en) * 1979-05-30 1980-12-10 Siemens Aktiengesellschaft Zinc oxide varistor
DE3033511C2 (en) * 1979-09-07 1994-09-08 Tdk Corp Voltage dependent resistance
JPS5852802A (en) * 1981-09-24 1983-03-29 株式会社明電舎 Zinc oxide nonlinear resistor
JPS59117203A (en) * 1982-12-24 1984-07-06 株式会社東芝 Voltage and current nonlinear resistor
DE3619620A1 (en) * 1986-06-11 1987-12-17 Siemens Ag Process for preparing ceramic zinc oxide varistor material and use of the material prepared according to this process
JPS6442803A (en) * 1987-08-11 1989-02-15 Ngk Insulators Ltd Voltage-dependent nonlinear resistor
US4996510A (en) * 1989-12-08 1991-02-26 Raychem Corporation Metal oxide varistors and methods therefor

Also Published As

Publication number Publication date
JPS5292398A (en) 1977-08-03
AU504734B2 (en) 1979-10-25
AU2082476A (en) 1978-06-29
DE2657805A1 (en) 1977-07-07
BR7608811A (en) 1977-10-25
CH630487A5 (en) 1982-06-15

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