GB1112765A - Improvements in or relating to semi-conducting ceramic glaze compositions - Google Patents

Improvements in or relating to semi-conducting ceramic glaze compositions

Info

Publication number
GB1112765A
GB1112765A GB2322365A GB2322365A GB1112765A GB 1112765 A GB1112765 A GB 1112765A GB 2322365 A GB2322365 A GB 2322365A GB 2322365 A GB2322365 A GB 2322365A GB 1112765 A GB1112765 A GB 1112765A
Authority
GB
United Kingdom
Prior art keywords
glaze
moles
tin oxide
oxide
thickness
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
GB2322365A
Inventor
Ernest Charles Bloor
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.)
Taylor Tunnicliff & Co Ltd
Original Assignee
Taylor Tunnicliff & 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
Application filed by Taylor Tunnicliff & Co Ltd filed Critical Taylor Tunnicliff & Co Ltd
Priority to GB2322365A priority Critical patent/GB1112765A/en
Publication of GB1112765A publication Critical patent/GB1112765A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
    • C03C8/04—Frit compositions, i.e. in a powdered or comminuted form containing zinc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
    • H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
    • H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
    • H01C17/06533—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of oxides
    • H01C17/06546—Oxides of zinc or cadmium

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

A semi-conducting ceramic glaze composition composed of a base glaze within which is incorporated "blue tin oxide" and zinc oxide, the amount of blue tin oxide present being within the range 12.5% to 25% by weight of the total composition, and zinc oxide is present in an amount within the range 1-12% by weight of the total composition. Blue tin oxide is prepared by calcining at an appropriate temperature a mixture of tin oxide and antimony pentoxide (Sb2O5), preferably in proportions of between 95-99.5 mole per cent of tin oxide and 0.5-5 mole per cent of Sb2O5. A suitable base glaze has the molar composition: X 0.1-0.35 moles; Al2O3 0.25-0.6 moles; Y 0.9-0.65 moles; BaO3 0-0.2 moles; SiO2 2.5-6.0 moles, X being any oxide or combination of oxides of metals of Group Ia in the Periodic classification, and Y being any oxide or combination of oxides of metals in Group IIa of the Periodic classification. The glaze is used to coat ceramic articles, such as high voltage electrical insulators, for controlling the voltage distribution over the surface of the article. The glaze may be applied by dipping or spraying, careful control of time or volume of glaze being necessary to obtain the correct unfired thickness for producing surface resistivities within the required range. Thickness up to 0.04 inch may be obtained by multiple dipping, the preferred thickness being 0.01-0.02 inch such thicknesses giving a surface resistivity of less than 100 megohms per square. The glaze may contain up to 1% of organic binders such as sodium carboxymethyl cellulose to strengthen the glaze layer. The glaze is fired at temperatures between 1050 DEG and 1250 DEG C.
GB2322365A 1965-06-01 1965-06-01 Improvements in or relating to semi-conducting ceramic glaze compositions Expired GB1112765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2322365A GB1112765A (en) 1965-06-01 1965-06-01 Improvements in or relating to semi-conducting ceramic glaze compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2322365A GB1112765A (en) 1965-06-01 1965-06-01 Improvements in or relating to semi-conducting ceramic glaze compositions

Publications (1)

Publication Number Publication Date
GB1112765A true GB1112765A (en) 1968-05-08

Family

ID=10192149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2322365A Expired GB1112765A (en) 1965-06-01 1965-06-01 Improvements in or relating to semi-conducting ceramic glaze compositions

Country Status (1)

Country Link
GB (1) GB1112765A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2064253A1 (en) * 1969-10-11 1971-07-16 Ngk Insulators Ltd
US4112193A (en) 1975-11-11 1978-09-05 Nippon Gaishi Kabushiki Kaishi Electrical insulators
FR2421857A1 (en) * 1978-04-03 1979-11-02 Trw Inc COMPOSITION FOR ENAMELLED RESISTANCE, ENAMELLED RESISTANCE AND PROCESS FOR MAKING SUCH A RESISTANCE
US4232185A (en) 1977-05-02 1980-11-04 Ngk Insulators, Ltd. Electrical insulator with semiconductive glaze
FR2545259A1 (en) * 1983-04-29 1984-11-02 Ceraver ELECTRIC INSULATOR HAVING AN IMPROVED INSENSITIVITY TO POLLUTION
WO1998020504A1 (en) * 1996-11-06 1998-05-14 Ifö Ceramics Aktiebolag Electric insulator and method for the production of such insulator
US6043582A (en) * 1998-08-19 2000-03-28 General Electric Co. Stable conductive material for high voltage armature bars

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2064253A1 (en) * 1969-10-11 1971-07-16 Ngk Insulators Ltd
US4112193A (en) 1975-11-11 1978-09-05 Nippon Gaishi Kabushiki Kaishi Electrical insulators
US4232185A (en) 1977-05-02 1980-11-04 Ngk Insulators, Ltd. Electrical insulator with semiconductive glaze
FR2421857A1 (en) * 1978-04-03 1979-11-02 Trw Inc COMPOSITION FOR ENAMELLED RESISTANCE, ENAMELLED RESISTANCE AND PROCESS FOR MAKING SUCH A RESISTANCE
FR2545259A1 (en) * 1983-04-29 1984-11-02 Ceraver ELECTRIC INSULATOR HAVING AN IMPROVED INSENSITIVITY TO POLLUTION
EP0126984A1 (en) * 1983-04-29 1984-12-05 CERAVER Société anonyme dite: Electrical insulator having an insensitivity to pollution
WO1998020504A1 (en) * 1996-11-06 1998-05-14 Ifö Ceramics Aktiebolag Electric insulator and method for the production of such insulator
US6043582A (en) * 1998-08-19 2000-03-28 General Electric Co. Stable conductive material for high voltage armature bars

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