GB731372A - Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements - Google Patents

Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements

Info

Publication number
GB731372A
GB731372A GB1754152A GB1754152A GB731372A GB 731372 A GB731372 A GB 731372A GB 1754152 A GB1754152 A GB 1754152A GB 1754152 A GB1754152 A GB 1754152A GB 731372 A GB731372 A GB 731372A
Authority
GB
United Kingdom
Prior art keywords
layer
alumina
fired
per cent
oxides
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
GB1754152A
Inventor
John Martin Herbert
Norman Clement Moore
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB1754152A priority Critical patent/GB731372A/en
Publication of GB731372A publication Critical patent/GB731372A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • 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
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/41—Sparking plugs structurally combined with other devices with interference suppressing or shielding means

Abstract

A ceramic element suitable for use as a semi-conductor resistor in low voltage ignition systems, comprises a layer of a fired mixture of at least 5 per cent zinc oxide and 95 per cent of oxides of metals from any of the groups Ib, IVb, Vb, VIIa and VIII of the Periodic Table, on a refractory insulating base comprising alumina, or mixtures of alumina and silica or of alumina magnesia and silica. The metal oxides may be applied as a dry powder and fired at 750 DEG to 1400 DEG C. to secure adhesion of the layer to the ceramic base. Metal electrodes may be applied to the layer by electroplating copper from a cyanide solution. A layer of zinc p nickel oxide may be applied by immersing a disc of alumina in a powder consisting of 80 parts of zinc oxide and 20 parts of nickel carbonate and firing at 1750 DEG C. In a further example alumina base material is immersed in a mixture of zinc oxide with 3-25 per cent of titanium dioxide and fired at 1300 DEG C. The surface of the ceramic base may be grooved to increase the resistance path of the layer. According to the Provisional Specification, the metal oxides may also be taken from Group IIb, and carbonates may be used in place of oxides. The layer may be applied as a thin film in a binding medium, and magnesium oxide, zirconia, thoria, and steatite may be used as the base material.
GB1754152A 1952-07-11 1952-07-11 Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements Expired GB731372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1754152A GB731372A (en) 1952-07-11 1952-07-11 Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1754152A GB731372A (en) 1952-07-11 1952-07-11 Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements

Publications (1)

Publication Number Publication Date
GB731372A true GB731372A (en) 1955-06-08

Family

ID=10096981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1754152A Expired GB731372A (en) 1952-07-11 1952-07-11 Improvements in or relating to ceramic materials applicable in low voltage ignition systems or resistor elements

Country Status (1)

Country Link
GB (1) GB731372A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934736A (en) * 1957-10-08 1960-04-26 Corning Glass Works Electrical resistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2934736A (en) * 1957-10-08 1960-04-26 Corning Glass Works Electrical resistor

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