GB1507712A - Preparation of alkali-metal-boro-silicate glasses - Google Patents
Preparation of alkali-metal-boro-silicate glassesInfo
- 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
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.
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)
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 |
-
1975
- 1975-07-14 GB GB5104076A patent/GB1507712A/en not_active Expired
Cited By (4)
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 |