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GB946030A - Improvements in or relating to glass compositions and glass-to-metal seals - Google Patents

Improvements in or relating to glass compositions and glass-to-metal seals

Info

Publication number
GB946030A
GB946030A GB2642461A GB2642461A GB946030A GB 946030 A GB946030 A GB 946030A GB 2642461 A GB2642461 A GB 2642461A GB 2642461 A GB2642461 A GB 2642461A GB 946030 A GB946030 A GB 946030A
Authority
GB
United Kingdom
Prior art keywords
glass
tungsten
sealing
relating
sio2
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
GB2642461A
Inventor
Lucy Florence Oldfield
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2642461A priority Critical patent/GB946030A/en
Publication of GB946030A publication Critical patent/GB946030A/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
    • C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
    • C03C3/108—Glass compositions containing silica with 40% to 90% silica, by weight containing lead containing boron
    • 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
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
    • 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
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen

Landscapes

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

Abstract

A glass for sealing directly to tungsten or to other materials with similar thermal expansion characteristics, consists of, in percentages by weight, SiO2 72.5-77.5; B2O3 14.0-16.5; PbO 4.0-7.0; K2O 6.5-7.5; Al2O3 0-2.5; BaO or SrO or ZnO 0-1; with refining agent (KCl, Sb2O5 or As2O3) 0.1-0.3, the ratio of SiO2 to B2O3 being in the range 4.5: 1 to 5.5 : 1. The glass may be used for sealing in of tungsten rods, either to glass as above or a bead of the glass between the rod and the normal borosilicate glass. The tungsten rod may be coated with a very thin film of alkali-free high silica glass before sealing. Specifications 583,208 and 597,292 are referred to.
GB2642461A 1961-07-20 1961-07-20 Improvements in or relating to glass compositions and glass-to-metal seals Expired GB946030A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2642461A GB946030A (en) 1961-07-20 1961-07-20 Improvements in or relating to glass compositions and glass-to-metal seals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2642461A GB946030A (en) 1961-07-20 1961-07-20 Improvements in or relating to glass compositions and glass-to-metal seals

Publications (1)

Publication Number Publication Date
GB946030A true GB946030A (en) 1964-01-08

Family

ID=10243423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2642461A Expired GB946030A (en) 1961-07-20 1961-07-20 Improvements in or relating to glass compositions and glass-to-metal seals

Country Status (1)

Country Link
GB (1) GB946030A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520115A (en) * 1982-08-02 1985-05-28 Schott Glaswerke High absorbance Pb-containing glass for cathode ray tube picture screen
US5215944A (en) * 1991-07-29 1993-06-01 Ppg Industries, Inc. X-ray absorbing glass compositions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520115A (en) * 1982-08-02 1985-05-28 Schott Glaswerke High absorbance Pb-containing glass for cathode ray tube picture screen
US5215944A (en) * 1991-07-29 1993-06-01 Ppg Industries, Inc. X-ray absorbing glass compositions

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