GB1450581A - Oxide varistor - Google Patents

Oxide varistor

Info

Publication number
GB1450581A
GB1450581A GB4257673A GB4257673A GB1450581A GB 1450581 A GB1450581 A GB 1450581A GB 4257673 A GB4257673 A GB 4257673A GB 4257673 A GB4257673 A GB 4257673A GB 1450581 A GB1450581 A GB 1450581A
Authority
GB
United Kingdom
Prior art keywords
per cent
sept
mol per
sintered
mixed
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
GB4257673A
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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
Priority claimed from JP47090446A external-priority patent/JPS529302B2/ja
Priority claimed from JP47090447A external-priority patent/JPS529303B2/ja
Priority claimed from JP47092897A external-priority patent/JPS5224233B2/ja
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Publication of GB1450581A publication Critical patent/GB1450581A/en
Expired 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

1450581 Varistor compositions TOKYO SHIBAURA ELECTRIC CO Ltd 11 Sept 1973 [11 Sept 1972 (2) 18 Sept 1972] 42576/73 Heading C1J [Also in Division H1] A varistor comprises a body prepared from a basic composition consisting of 70-40 mol per cent total of one or more of TiO 2 , SnO 2 and ZrO 2 , 29-85 mol per cent ZnO, and 1-20 mol per cent Sb 2 O 3 to which is added (based on the weight of the basic composition) 1-20 wt. per cent Bi 2 O 3 and 0À5-10 wt. per cent total of one or more of Fe 2 O 3 , Cr 2 O 3 , Mn 2 O 3 , and CO 2 O 3 . Control compositions disclosed extend these ranges. As described the components are mixed, sintered at 600-900‹ C., powdered, mixed with binder (polyvinylalcohol), pressed to disc form (e.g. at 10<SP>3</SP> kg. cm.<SP>-2</SP>) sintered in air at 1000- 1300‹ C. for 1-6 hours and provided with Ag or In-Ga electrodes baked on at (for Ag) 400- 800‹ C.
GB4257673A 1972-09-11 1973-09-11 Oxide varistor Expired GB1450581A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP47090446A JPS529302B2 (en) 1972-09-11 1972-09-11
JP47090447A JPS529303B2 (en) 1972-09-11 1972-09-11
JP47092897A JPS5224233B2 (en) 1972-09-18 1972-09-18

Publications (1)

Publication Number Publication Date
GB1450581A true GB1450581A (en) 1976-09-22

Family

ID=27306447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4257673A Expired GB1450581A (en) 1972-09-11 1973-09-11 Oxide varistor

Country Status (8)

Country Link
US (1) US3899451A (en)
CA (1) CA1001399A (en)
CH (1) CH604341A5 (en)
DE (1) DE2345753C3 (en)
FR (1) FR2199173B1 (en)
GB (1) GB1450581A (en)
IT (1) IT997586B (en)
SE (1) SE385750B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1521137A (en) * 1974-11-07 1978-08-16 Tdk Electronics Co Ltd Ceramic dielectric composition
US4165351A (en) * 1975-09-25 1979-08-21 General Electric Company Method of manufacturing a metal oxide varistor
JPS5366561A (en) * 1976-11-26 1978-06-14 Matsushita Electric Ind Co Ltd Thick film varistor composition
JPS53143952A (en) * 1977-05-21 1978-12-14 Mitsubishi Electric Corp Protective device for anomalous voltage
US4296002A (en) * 1979-06-25 1981-10-20 Mcgraw-Edison Company Metal oxide varistor manufacture
US4394297A (en) * 1981-05-26 1983-07-19 Phillips Petroleum Company Zinc titanate catalyst
JPS5812306A (en) * 1981-07-16 1983-01-24 株式会社東芝 Oxide voltage nonlinear resistor
EP0074177A3 (en) * 1981-08-24 1983-08-31 General Electric Company Metal oxide varistor with controllable breakdown voltage and capacitance
US4495482A (en) * 1981-08-24 1985-01-22 General Electric Company Metal oxide varistor with controllable breakdown voltage and capacitance and method of making
JPH0685363B2 (en) * 1991-09-30 1994-10-26 ソマール株式会社 High voltage varistor and manufacturing method thereof
JPH11340009A (en) * 1998-05-25 1999-12-10 Toshiba Corp Nonlinear resistor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669907A (en) * 1966-12-07 1972-06-13 Matsushita Electric Ind Co Ltd Semiconductive elements
US3806765A (en) * 1972-03-01 1974-04-23 Matsushita Electric Ind Co Ltd Voltage-nonlinear resistors
US3805114A (en) * 1972-03-01 1974-04-16 Matsushita Electric Ind Co Ltd Voltage-nonlinear resistors
US3778743A (en) * 1973-02-23 1973-12-11 Matsushita Electric Ind Co Ltd Voltage-nonlinear resistors

Also Published As

Publication number Publication date
US3899451A (en) 1975-08-12
CA1001399A (en) 1976-12-14
AU6002673A (en) 1975-03-06
CH604341A5 (en) 1978-09-15
FR2199173B1 (en) 1976-10-01
SE385750B (en) 1976-07-19
DE2345753A1 (en) 1974-03-21
FR2199173A1 (en) 1974-04-05
DE2345753C3 (en) 1978-03-09
DE2345753B2 (en) 1977-07-21
IT997586B (en) 1975-12-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee