GB833216A - Electrical components and other bodies with negligible temperature coefficient expansion - Google Patents

Electrical components and other bodies with negligible temperature coefficient expansion

Info

Publication number
GB833216A
GB833216A GB288856A GB288856A GB833216A GB 833216 A GB833216 A GB 833216A GB 288856 A GB288856 A GB 288856A GB 288856 A GB288856 A GB 288856A GB 833216 A GB833216 A GB 833216A
Authority
GB
United Kingdom
Prior art keywords
temperature coefficient
cellulose
expansion
cellulose derivative
polytetrafluoroethylene
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
GB288856A
Inventor
Merritt A Rudner
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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 Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA filed Critical Montedison SpA
Priority to GB288856A priority Critical patent/GB833216A/en
Publication of GB833216A publication Critical patent/GB833216A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H01B3/004—Inhomogeneous material in general with conductive additives or conductive layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/002—Inhomogeneous material in general
    • H01B3/006—Other inhomogeneous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Articles are moulded from a composition comprising a mixture of a synthetic resin or a cellulose derivative, which can be reduced to powder form and has a natural positive temperature coefficient of expansion, and lithium alumina silicate in sufficient quantity to reduce the positive temperature coefficient of expansion of said resin or cellulose derivative. The composition may also include electrical conducting materials such as carbon, boron carbide, ferrites, powdered iron, lead, tin, silver, zinc, copper or alloys thereof. The synthetic resin may be polytetrafluoroethylene, polytrifluorochloroethylene, polyethylene, polystyrene, methacrylate polymers, phenol-, aniline-, ureaor melamine-formaldehyde polymers, furans, epoxy resins or nylon, and the cellulose derivative may be ethyl cellulose, cellulose acetate or cellulose acetate butyrates. The lithium alumina silicate may be petalite, spodumene or eucryptite. The mixture may be made by tumbling, barrel rolling, dry or wet mixing or micropulverizing techniques. The article after moulding is heat-treated to form an integral body, e.g. in the case of polytetrafluoroethylene at a temperature above 700 DEG C. The moulded article may be a resistor, potentiometer, or resistance card.
GB288856A 1956-01-30 1956-01-30 Electrical components and other bodies with negligible temperature coefficient expansion Expired GB833216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB288856A GB833216A (en) 1956-01-30 1956-01-30 Electrical components and other bodies with negligible temperature coefficient expansion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB288856A GB833216A (en) 1956-01-30 1956-01-30 Electrical components and other bodies with negligible temperature coefficient expansion

Publications (1)

Publication Number Publication Date
GB833216A true GB833216A (en) 1960-04-21

Family

ID=9747897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB288856A Expired GB833216A (en) 1956-01-30 1956-01-30 Electrical components and other bodies with negligible temperature coefficient expansion

Country Status (1)

Country Link
GB (1) GB833216A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113450943A (en) * 2021-09-02 2021-09-28 西安宏星电子浆料科技股份有限公司 Thermal shock resistant conductor paste for thick film circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113450943A (en) * 2021-09-02 2021-09-28 西安宏星电子浆料科技股份有限公司 Thermal shock resistant conductor paste for thick film circuit

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