GB1507712A - Preparation of alkali-metal-boro-silicate glasses - Google Patents

Preparation of alkali-metal-boro-silicate glasses

Info

Publication number
GB1507712A
GB1507712A GB5104076A GB5104076A GB1507712A GB 1507712 A GB1507712 A GB 1507712A GB 5104076 A GB5104076 A GB 5104076A GB 5104076 A GB5104076 A GB 5104076A GB 1507712 A GB1507712 A GB 1507712A
Authority
GB
United Kingdom
Prior art keywords
melt
alkali metal
gaseous mixture
glass
borosilicate glass
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
GB5104076A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB5104076A priority Critical patent/GB1507712A/en
Publication of GB1507712A publication Critical patent/GB1507712A/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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/193—Stirring devices; Homogenisation using gas, e.g. bubblers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • 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
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • C03C13/046—Multicomponent glass compositions
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron

Landscapes

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

Abstract

1507712 Making alkali metal borosilicate glass POST OFFICE 14 July 1975 [29 July 1974 9 Dec 1974 24 Jan 1975] 51040/76 51041/76 and 51042/76 Divided out of 1507711 Heading C1M Molten alkali metal borosilicate glass is treated (to render it suitable for use in optical waveguides) by bubbling through the melt a gaseous mixture of carbon dioxide and carbon monoxide. The gaseous mixture preferably includes up to 20% by volume of CO. The melt may be maintained at 800-1400‹C during the treatment, which may be for 30-120 minutes. The gaseous mixture preferably is bubbled through the melt at a rate of 100-500 c.c./min./kg. of batch material. The molten glass may subsequently be fired for up to 40 hours in air or, preferably, dry CO 2 or N 2 . The glass is preferably an alkali metal borosilicate glass comprising a redox buffering oxide as claimed in Specification 1,507,711.
GB5104076A 1975-07-14 1975-07-14 Preparation of alkali-metal-boro-silicate glasses Expired GB1507712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5104076A GB1507712A (en) 1975-07-14 1975-07-14 Preparation of alkali-metal-boro-silicate glasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5104076A GB1507712A (en) 1975-07-14 1975-07-14 Preparation of alkali-metal-boro-silicate glasses

Publications (1)

Publication Number Publication Date
GB1507712A true GB1507712A (en) 1978-04-19

Family

ID=10458402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5104076A Expired GB1507712A (en) 1975-07-14 1975-07-14 Preparation of alkali-metal-boro-silicate glasses

Country Status (1)

Country Link
GB (1) GB1507712A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103441A1 (en) * 1982-09-10 1984-03-21 BRITISH TELECOMMUNICATIONS public limited company Method for drying oxide glasses
US4741752A (en) * 1984-08-03 1988-05-03 British Telecommunications Plc Treating glass compositions
EP0915062A1 (en) * 1997-10-23 1999-05-12 Pichanon Dipl.-Ing Suwannathada Method for regulating the redoxcondition, the colour and workability from glassmelts

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103441A1 (en) * 1982-09-10 1984-03-21 BRITISH TELECOMMUNICATIONS public limited company Method for drying oxide glasses
US4539033A (en) * 1982-09-10 1985-09-03 British Telecommunications Method for drying oxide glasses
US4741752A (en) * 1984-08-03 1988-05-03 British Telecommunications Plc Treating glass compositions
EP0915062A1 (en) * 1997-10-23 1999-05-12 Pichanon Dipl.-Ing Suwannathada Method for regulating the redoxcondition, the colour and workability from glassmelts

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19950713