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FR2428306A1 - Zinc oxide varistor with alternating voltage stability - contains barium oxide and boron oxide and is useful for surge arresters - Google Patents

Zinc oxide varistor with alternating voltage stability - contains barium oxide and boron oxide and is useful for surge arresters

Info

Publication number
FR2428306A1
FR2428306A1 FR7914279A FR7914279A FR2428306A1 FR 2428306 A1 FR2428306 A1 FR 2428306A1 FR 7914279 A FR7914279 A FR 7914279A FR 7914279 A FR7914279 A FR 7914279A FR 2428306 A1 FR2428306 A1 FR 2428306A1
Authority
FR
France
Prior art keywords
oxide
alternating voltage
useful
voltage stability
surge arresters
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.)
Withdrawn
Application number
FR7914279A
Other languages
French (fr)
Inventor
Herbert Fishman
Howard Franklin Ellis
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of FR2428306A1 publication Critical patent/FR2428306A1/en
Withdrawn legal-status Critical Current

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

Zn oxide varistor compsn. contains 0.01-0.10 (0.10) mole-% BaO and 0.01-0.01 (0.01) mole-% B2O3 to produce good alternating voltage stability, partic. in the 400-600 degrees C range. The variator is produced by pressing and sintering the compsn. and heating for >=1 hr. at 400-800 degrees C to impart stability in alternating voltage operation. These varistors are used in lightning arrestors and spark gaps to protect electrical equipment from overloads. They have a low initial wattage loss and long-term stability.
FR7914279A 1978-06-05 1979-06-05 Zinc oxide varistor with alternating voltage stability - contains barium oxide and boron oxide and is useful for surge arresters Withdrawn FR2428306A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91249278A 1978-06-05 1978-06-05

Publications (1)

Publication Number Publication Date
FR2428306A1 true FR2428306A1 (en) 1980-01-04

Family

ID=25432014

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7914279A Withdrawn FR2428306A1 (en) 1978-06-05 1979-06-05 Zinc oxide varistor with alternating voltage stability - contains barium oxide and boron oxide and is useful for surge arresters

Country Status (3)

Country Link
DE (1) DE2921479A1 (en)
FR (1) FR2428306A1 (en)
SE (1) SE7904839L (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642567A1 (en) * 1975-09-25 1977-04-07 Gen Electric METAL OXYDE VARISTOR WITH IMPROVED ELECTRICAL PROPERTIES

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642567A1 (en) * 1975-09-25 1977-04-07 Gen Electric METAL OXYDE VARISTOR WITH IMPROVED ELECTRICAL PROPERTIES

Also Published As

Publication number Publication date
SE7904839L (en) 1979-12-06
DE2921479A1 (en) 1979-12-06

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Legal Events

Date Code Title Description
ST Notification of lapse