GB922491A - Compositions for thermistors - Google Patents

Compositions for thermistors

Info

Publication number
GB922491A
GB922491A GB1051560A GB1051560A GB922491A GB 922491 A GB922491 A GB 922491A GB 1051560 A GB1051560 A GB 1051560A GB 1051560 A GB1051560 A GB 1051560A GB 922491 A GB922491 A GB 922491A
Authority
GB
United Kingdom
Prior art keywords
oxides
lead oxide
calcining
sieving
oxide
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
GB1051560A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB922491A publication Critical patent/GB922491A/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
    • H01C7/04—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 having negative temperature coefficient
    • H01C7/042—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 having negative temperature coefficient mainly consisting of inorganic non-metallic substances
    • H01C7/043—Oxides or oxidic compounds
    • 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
    • H01C7/04—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 having negative temperature coefficient

Landscapes

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

Abstract

922,491. Thermistors. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. March 24, 1960 [April 3, 1959], No. 10515/60. Class 37. A thermistor material comprises oxides of manganese and nickel and an amount of lead oxide equal to from 0.1 to 10% by weight of all the other constituents combined. A typical material is made by grinding together in an aqueous medium weighed amounts of oxides of manganese, nickel, and perhaps oxides of cobalt and/or copper, with lead oxide or one or more lead salts capable of calcining to the oxide, drying, sieving, mixing with a 10% solution of polyvinyl alcohol, sieving, moulding under pressure and calcining and fritting at 1260‹ C. Alternatively the oxides may be prefritted by heating at 600-1200‹ C. before the lead oxide is added. The presence of the lead oxide in the composition in addition to reducing the resistivity of the product without significantly affecting its temperature coefficient and reducing the effect of variations in the fritting temperature, results in a less porous body. Examples of specific compositions are given.
GB1051560A 1959-04-03 1960-03-24 Compositions for thermistors Expired GB922491A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR791161A FR1230623A (en) 1959-04-03 1959-04-03 Compositions for thermistors

Publications (1)

Publication Number Publication Date
GB922491A true GB922491A (en) 1963-04-03

Family

ID=8713237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1051560A Expired GB922491A (en) 1959-04-03 1960-03-24 Compositions for thermistors

Country Status (2)

Country Link
FR (1) FR1230623A (en)
GB (1) GB922491A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374185A (en) * 1964-09-17 1968-03-19 Matsushita Electric Ind Co Ltd Electroconductive composition containing bapbo3

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3374185A (en) * 1964-09-17 1968-03-19 Matsushita Electric Ind Co Ltd Electroconductive composition containing bapbo3

Also Published As

Publication number Publication date
FR1230623A (en) 1960-09-19

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