GB1225236A - - Google Patents

Info

Publication number
GB1225236A
GB1225236A GB1225236DA GB1225236A GB 1225236 A GB1225236 A GB 1225236A GB 1225236D A GB1225236D A GB 1225236DA GB 1225236 A GB1225236 A GB 1225236A
Authority
GB
United Kingdom
Prior art keywords
firing
porcelain
hydrogen
ceramic
vitrified
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
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 filed Critical
Publication of GB1225236A publication Critical patent/GB1225236A/en
Expired legal-status Critical Current

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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
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

1,225,236. Vitrified ceramics; enamelling. TAYLOR, TUNNICLIFF & CO. Ltd. 3 July, 1968 [4 April, 1967], No. 15360/67. Headings C1J and C1M. Ceramic bodies having a dense vitrified structure and less than 4% closed pore volume are produced by firing a ceramic composition in the form of a pre-shaped coherent mass containing clay and including fusible and/or glassforming components in the presence of hydrogen at the peak firing temperature. The invention is applicable to steatite, cordierite, alumina-enriched porcelain, zircon porcelain or electric insulator porcelain bodies, which may be shaped by conventional plastic moulding and initially prefired in air below vitrification temperature, or in air followed by nitrogen, before the firing in hydrogen. For example, firing in air up to 1100‹ C. may precede firing in hydrogen to 1200‹ C., cooling, and then re-firing to 1250‹ C. The invention also applies to glazing porcelain or other ceramic bodies, the unfired body being coated with a ceramic glazing composition and the coated body vitrified and matured in a hydrogen atmosphere.
GB1225236D 1967-04-04 1967-04-04 Expired GB1225236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1536067 1967-04-04

Publications (1)

Publication Number Publication Date
GB1225236A true GB1225236A (en) 1971-03-17

Family

ID=10057802

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225236D Expired GB1225236A (en) 1967-04-04 1967-04-04

Country Status (1)

Country Link
GB (1) GB1225236A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees