GB1022681A - Improvements in or relating to devitrified glass-ceramics and their production - Google Patents

Improvements in or relating to devitrified glass-ceramics and their production

Info

Publication number
GB1022681A
GB1022681A GB2223061A GB2223061A GB1022681A GB 1022681 A GB1022681 A GB 1022681A GB 2223061 A GB2223061 A GB 2223061A GB 2223061 A GB2223061 A GB 2223061A GB 1022681 A GB1022681 A GB 1022681A
Authority
GB
United Kingdom
Prior art keywords
glass
oxide
molybdenum
tungsten
ceramics
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
GB2223061A
Inventor
Peter William Mcmillan
Graham Partridge
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.)
English Electric Co Ltd
Original Assignee
English Electric 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB2223061A priority Critical patent/GB1022681A/en
Publication of GB1022681A publication Critical patent/GB1022681A/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
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
    • C03C10/0027—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents
    • 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
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
    • C03C10/0045—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents containing SiO2, Al2O3 and MgO as main constituents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (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

Glass-ceramic articles are formed from a glass having as major constituents, at least 90% by weight, SiO2 45 to 82; Al2O3 10 to 36; Li2 0 to 25; MgO 0 to 32 with optional minor constituents consisting of Na2O and/or K2O 0 to 5; ZnO 0 to 10; CaO 0 to 5; B2O3 0 to 10 with, as nucleating agent, an oxide of tungsten and/or an oxide of molybdenum or a metallic phosphate together with an oxide from the oxides of tungsten and/or molybdenum and/or vanadium and/or titanium, the glass article being heat-treated by raising its temperature progressively in a single stage to a temperature at which devitrification takes place so as to form a predominantly micro-crystalline glass-ceramic material. Specific examples are given.
GB2223061A 1961-06-20 1961-06-20 Improvements in or relating to devitrified glass-ceramics and their production Expired GB1022681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2223061A GB1022681A (en) 1961-06-20 1961-06-20 Improvements in or relating to devitrified glass-ceramics and their production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2223061A GB1022681A (en) 1961-06-20 1961-06-20 Improvements in or relating to devitrified glass-ceramics and their production

Publications (1)

Publication Number Publication Date
GB1022681A true GB1022681A (en) 1966-03-16

Family

ID=10176031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2223061A Expired GB1022681A (en) 1961-06-20 1961-06-20 Improvements in or relating to devitrified glass-ceramics and their production

Country Status (1)

Country Link
GB (1) GB1022681A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519828A (en) * 1982-07-06 1985-05-28 Corning Glass Works Transparent glass-ceramics containing mullite
EP0168189A2 (en) * 1984-07-02 1986-01-15 Corning Glass Works Transparent, mullite-containing glass-ceramics
EP0695726A1 (en) * 1994-08-01 1996-02-07 Ivoclar Ag Alkali zinc silicate glass ceramics and glasses
US11236012B2 (en) 2018-03-28 2022-02-01 Corning Incorporated Boron phosphate glass-ceramics with low dielectric loss

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4519828A (en) * 1982-07-06 1985-05-28 Corning Glass Works Transparent glass-ceramics containing mullite
EP0168189A2 (en) * 1984-07-02 1986-01-15 Corning Glass Works Transparent, mullite-containing glass-ceramics
EP0168189A3 (en) * 1984-07-02 1987-01-07 Corning Glass Works Transparent, mullite-containing glass-ceramics
EP0695726A1 (en) * 1994-08-01 1996-02-07 Ivoclar Ag Alkali zinc silicate glass ceramics and glasses
AU699101B2 (en) * 1994-08-01 1998-11-19 Ivoclar Ag Alkali-zinc-silicate glass-ceramics and glasses
EP1329430A3 (en) * 1994-08-01 2004-03-10 Ivoclar Vivadent AG Alkali zinc silicate glass-ceramics and glasses
US11236012B2 (en) 2018-03-28 2022-02-01 Corning Incorporated Boron phosphate glass-ceramics with low dielectric loss

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