GB1454496A - Glazes for ceramic articles - Google Patents

Glazes for ceramic articles

Info

Publication number
GB1454496A
GB1454496A GB5538772A GB5538772A GB1454496A GB 1454496 A GB1454496 A GB 1454496A GB 5538772 A GB5538772 A GB 5538772A GB 5538772 A GB5538772 A GB 5538772A GB 1454496 A GB1454496 A GB 1454496A
Authority
GB
United Kingdom
Prior art keywords
composition
eutectic
coating
sio
ceramic
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
GB5538772A
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB5538772A priority Critical patent/GB1454496A/en
Publication of GB1454496A publication Critical patent/GB1454496A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

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

Abstract

1454496 Glazing ceramics FERRANTI Ltd 11 Feb 1974 [30 Nov 1972] 55387/72 Heading C1M A ceramic body, having at least a surface layer having an alumina or beryllia content of at least 85% by weight, is glazed by coating the surface with a glaze composition comprising silica, at least one alkaline earth metal oxide (e.g. CaO or MgO), possibly incidental impurities, and, optionally, alumina or beryllia (the same as in the ceramic), in relative proportions such that on firing a (silica-alkaline earth metal oxide-alumina or beryllia) eutectic mixture is formed, heating the coated body to at least the eutectic point to form a molten glaze comprising the eutectic composition, and cooling to form a glazed body. The coating composition may itself contain Al 2 O 3 or BeO, but preferably Al 2 O 3 or BeO is transferred from the ceramic into the coating during the firing, which may be in hydrogen at 1200-1450‹ C. The coating composition may also comprise B 2 O 3 and/or K 2 O, and may comprise a refractory metal (e.g. Mo or W). When Mo is present, Mn powder may also be present. The refractory metal may constitute 30% by volume of the coating composition. Preferably the coating composition is such that at least 95% of the particles are of size 5-10 microns. The applied coating is preferably of thickness 60-100 microns. In examples, a ceramic comprising 88% by weight alumina is coated with (1) a composition comprising (by weight) 25% MgO and 75% SiO 2 , to give a eutectic of composition 20À3% MgO, 61À4% SiO 2 and 18À3% Al 2 O 3 (eutectic point 1355‹ C.); and (2) a composition comprising (by weight) 27À2% CaO and 72À8% SiO 2 , to give a eutectic of composition 23À3% CaO, 62À1% SiO 2 and 14À6% Al 2 O 3 (eutectic point 1170‹ C.).
GB5538772A 1972-11-30 1972-11-30 Glazes for ceramic articles Expired GB1454496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5538772A GB1454496A (en) 1972-11-30 1972-11-30 Glazes for ceramic articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5538772A GB1454496A (en) 1972-11-30 1972-11-30 Glazes for ceramic articles

Publications (1)

Publication Number Publication Date
GB1454496A true GB1454496A (en) 1976-11-03

Family

ID=10473758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5538772A Expired GB1454496A (en) 1972-11-30 1972-11-30 Glazes for ceramic articles

Country Status (1)

Country Link
GB (1) GB1454496A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303402A2 (en) * 1987-08-10 1989-02-15 Inax Corporation Method of producing tiles by single firing
EP0303403A2 (en) * 1987-08-10 1989-02-15 Inax Corporation Tile glaze, glazing method, and method of producing tiles
EP1713149A1 (en) * 2005-04-12 2006-10-18 Raython Company Glaze soldered laser components and method of manufacturing
WO2018067202A1 (en) * 2016-10-03 2018-04-12 Raytheon Company Molding composite and method of making molded part
CN113896563A (en) * 2021-11-26 2022-01-07 东北大学 Method for preparing high-strength foamed ceramic material by using boric sludge and foamed ceramic material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303402A2 (en) * 1987-08-10 1989-02-15 Inax Corporation Method of producing tiles by single firing
EP0303403A2 (en) * 1987-08-10 1989-02-15 Inax Corporation Tile glaze, glazing method, and method of producing tiles
EP0303403A3 (en) * 1987-08-10 1989-08-16 Inax Corporation Tile glaze, glazing method, and method of producing tiles
EP0303402A3 (en) * 1987-08-10 1989-08-16 Inax Corporation Frit for tile glaze, tile glaze, and method of producing tiles
EP1713149A1 (en) * 2005-04-12 2006-10-18 Raython Company Glaze soldered laser components and method of manufacturing
US7630423B2 (en) 2005-04-12 2009-12-08 Raytheon Company Glaze soldered laser components and method of manufacturing
WO2018067202A1 (en) * 2016-10-03 2018-04-12 Raytheon Company Molding composite and method of making molded part
CN113896563A (en) * 2021-11-26 2022-01-07 东北大学 Method for preparing high-strength foamed ceramic material by using boric sludge and foamed ceramic material
CN113896563B (en) * 2021-11-26 2022-11-04 东北大学 Method for preparing high-strength foamed ceramic material by using boric sludge and foamed ceramic material

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee