GB1453310A - Process for making a voltage dependent resistor - Google Patents

Process for making a voltage dependent resistor

Info

Publication number
GB1453310A
GB1453310A GB6001173A GB6001173A GB1453310A GB 1453310 A GB1453310 A GB 1453310A GB 6001173 A GB6001173 A GB 6001173A GB 6001173 A GB6001173 A GB 6001173A GB 1453310 A GB1453310 A GB 1453310A
Authority
GB
United Kingdom
Prior art keywords
mol
per cent
sio
coating
varistor
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
GB6001173A
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
Priority claimed from JP733619A external-priority patent/JPS5240038B2/ja
Priority claimed from JP733610A external-priority patent/JPS5310678B2/ja
Priority claimed from JP4248873A external-priority patent/JPS5318277B2/ja
Priority claimed from JP6806673A external-priority patent/JPS5311079B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1453310A publication Critical patent/GB1453310A/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
    • H01C7/102—Varistor boundary, e.g. surface layers
    • 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
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/02—Apparatus or processes specially adapted for manufacturing resistors adapted for manufacturing resistors with envelope or housing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49101—Applying terminal

Landscapes

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

Abstract

1453310 Varistor composition MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 28 Dec 1973 [29 Dec 1972 (2) 13 April 1973 15 June 1973] 60011/73 Heading C1J [Also in Division H1] A varistor comprises a sintered coated body consisting of ZnO and at least one specified additive. The additives are: CoO, MnO, Sb 2 O 3 , BaO, SrO, PbO, UO 2 , SnO 2 , Cr 2 O 3 , SiO 2 , NiO. The coating is at least 10Ám. thick and consists of (before sintering) either the additive(s) used in the body; or 50-100 mol. per cent SiO 2 and 0-50 mol. per cent Bi 2 O 3 ; or not less than 30 mol. per cent Sb 2 O 3 and not more than 70 mol. per cent Bi 2 O 3 ; or not less than 50 mol. per cent In 2 O 3 and not more than 50 mol. per cent Bi 2 O 3 . When the coating material includes Bi 2 O 3 and SiO 2 or Sb 2 O 3 , the sintered coating comprises a high resistivity reaction product of ZnO and SiO 2 or Sb 2 O 3 , namely Zn 2 SiO 4 or, Zn 7 Sb 2 O 11 ; preferably, at 3Ám. below its surface the coating comprises more than 70 mol. per cent of such reaction product. The body is formed by conventionally sintering powdered materials under pressure, the coating materials being applied in a binder of organic resin in solvent. The varistor may be rod-shaped, having the coating formed on its side surface(s) and electrodes applied to its end surfaces; the electrodes may be made of noble metal paint; electroless- or electro-plated Ag, Cu, Ni, or Sn; vacuum evaporated Al, Zn, or Sn; or flamesprayed Cu, Su, Al or Zn. Lead wires may be connected to the electrodes with solder or a conductive adhesive comprising Ag powder and resin in an organic solvent. Alternatively, the varistor may be disc-shaped, coated overall, and, in some cases, reduced in thickness by abrading before opposite faces of the disc are spray-metallized with Al.
GB6001173A 1972-12-29 1973-12-28 Process for making a voltage dependent resistor Expired GB1453310A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP733619A JPS5240038B2 (en) 1972-12-29 1972-12-29
JP733610A JPS5310678B2 (en) 1972-12-29 1972-12-29
JP4248873A JPS5318277B2 (en) 1973-04-13 1973-04-13
JP6806673A JPS5311079B2 (en) 1973-06-15 1973-06-15

Publications (1)

Publication Number Publication Date
GB1453310A true GB1453310A (en) 1976-10-20

Family

ID=27453910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6001173A Expired GB1453310A (en) 1972-12-29 1973-12-28 Process for making a voltage dependent resistor

Country Status (7)

Country Link
US (1) US3872582A (en)
CA (1) CA1017072A (en)
DE (1) DE2365232B2 (en)
FR (1) FR2212620B1 (en)
GB (1) GB1453310A (en)
IT (1) IT1002565B (en)
NL (1) NL179524C (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031498A (en) * 1974-10-26 1977-06-21 Kabushiki Kaisha Meidensha Non-linear voltage-dependent resistor
NL7414775A (en) * 1974-11-13 1976-05-17 Philips Nv PROCESS FOR THE MANUFACTURE OF A VOLTAGE DEPENDENT RESISTOR AND THEREFORE OBTAINED VOLTAGE DEPENDENT RESISTOR.
US4042535A (en) * 1975-09-25 1977-08-16 General Electric Company Metal oxide varistor with improved electrical properties
CH601135A5 (en) * 1976-07-01 1978-06-30 Bbc Brown Boveri & Cie
DE2639042C3 (en) * 1976-08-30 1982-03-25 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Voltage-dependent resistance element and method for its manufacture
JPS5915443Y2 (en) * 1978-03-18 1984-05-08 三菱電機株式会社 Lightning arrester
JPS5827643B2 (en) * 1979-07-13 1983-06-10 株式会社日立製作所 Nonlinear resistor and its manufacturing method
SE441792B (en) * 1979-10-08 1985-11-04 Hitachi Ltd VOLTAGE-DEPENDING OILS RESISTOR
SE455143B (en) * 1980-03-19 1988-06-20 Meidensha Electric Mfg Co Ltd SET TO MAKE A NON-LINES, VOLTAGE-DEPENDENT RESISTOR
EP0147607B1 (en) * 1983-12-22 1988-05-04 BBC Brown Boveri AG Zinc oxide varistor
DE3566753D1 (en) * 1984-03-29 1989-01-12 Toshiba Kk ZINC OXIDE VOLTAGE - NON-LINEAR RESISTOR
DE3917570A1 (en) * 1989-05-30 1990-12-06 Siemens Ag Electrical ceramic component esp. cold conductor - has over-doped surface giving increased breakdown resistance
US5053739A (en) * 1989-12-15 1991-10-01 Electric Power Research Institute Very high energy absorbing varistor
US5075666A (en) * 1989-12-15 1991-12-24 Electric Power Research Institute Varistor composition for high energy absorption
SE466826B (en) * 1990-06-28 1992-04-06 Asea Brown Boveri MANUFACTURED TO MANUFACTURE A METAL OXID VARISTOR WITH FORBETTRAD ENERGY QUALITY
US5455554A (en) * 1993-09-27 1995-10-03 Cooper Industries, Inc. Insulating coating
US5817130A (en) * 1996-05-03 1998-10-06 Sulzer Intermedics Inc. Implantable cardiac cardioverter/defibrillator with EMI suppression filter with independent ground connection
JP2000091105A (en) * 1998-09-11 2000-03-31 Murata Mfg Co Ltd Chip type ceramic thermistor and its manufacture
JP2001176703A (en) * 1999-10-04 2001-06-29 Toshiba Corp Voltage nonlinear resistor and manufacturing method therefor
US6802116B2 (en) * 2001-03-20 2004-10-12 Abb Ab Method of manufacturing a metal-oxide varistor with improved energy absorption capability
CN101311364B (en) * 2008-03-10 2010-12-15 中国科学院长春光学精密机械与物理研究所 Process for preparing P-shaped zinc oxide semiconductor bulk material
US11945695B2 (en) * 2019-03-24 2024-04-02 Nilec Solutions, Llc Apparatus, system and method for the delivery of items onto surfaces including elevated surfaces

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS521113B1 (en) * 1966-05-16 1977-01-12
CA831691A (en) * 1967-10-09 1970-01-06 Matsuoka Michio Non-linear resistors of bulk type
US3503029A (en) * 1968-04-19 1970-03-24 Matsushita Electric Ind Co Ltd Non-linear resistor
FR2021207A1 (en) * 1968-10-22 1970-07-17 Matsushita Electric Ind Co Ltd
CA970476A (en) * 1971-08-27 1975-07-01 Matsushita Electric Industrial Co., Ltd. Process for making a voltage dependent resistor
US3764566A (en) * 1972-03-24 1973-10-09 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
DE2365232B2 (en) 1977-12-08
FR2212620A1 (en) 1974-07-26
NL7317729A (en) 1974-07-02
NL179524C (en) 1986-09-16
IT1002565B (en) 1976-05-20
FR2212620B1 (en) 1977-09-23
NL179524B (en) 1986-04-16
CA1017072A (en) 1977-09-06
US3872582A (en) 1975-03-25
DE2365232A1 (en) 1974-07-04

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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)
PE20 Patent expired after termination of 20 years

Effective date: 19931227