GB778355A - Glass compositions - Google Patents

Glass compositions

Info

Publication number
GB778355A
GB778355A GB34139/55A GB3413955A GB778355A GB 778355 A GB778355 A GB 778355A GB 34139/55 A GB34139/55 A GB 34139/55A GB 3413955 A GB3413955 A GB 3413955A GB 778355 A GB778355 A GB 778355A
Authority
GB
United Kingdom
Prior art keywords
glass
per
per cent
glass compositions
cdo
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
GB34139/55A
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.)
PPG Industries Inc
Original Assignee
Pittsburgh Plate Glass Co
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 Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Publication of GB778355A publication Critical patent/GB778355A/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
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • 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
    • 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
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • 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
    • C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Landscapes

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

Abstract

778,355. Glass. PITTSBURGH PLATE GLASS CO. Nov. 29, 1955 [Dec. 29, 1954], No. 34139/55. Class 56. A glass, particularly for the minor segment of a multifocal opthalmic lens and having a softening point above 1382‹F, a coefficient of thermal expansion 7.0 to 10.0 Î 10<SP>-6</SP> per degree between 25 and 300‹C, and an index of refraction (D line) between 1.57 and 1.67 comprises (per centage parts by weight) SiO 2 , 35-52; one or more of the alkali metal oxides, 6-12; BaO, 28-34; ZrO 2 , 2-15; and one or more oxides selected from CaO, ZnO, PbO, CdO, SrO 5-15 but preferably not more than 10 per cent any one. Optionally there may be present TiO 2 up to 5; Al 2 O 3 up to 5; fining agents (e.g. As 2 O 5 and Sb 2 O 4 ) up to 2 and fluorine up to 1.5 per cent.
GB34139/55A 1954-12-29 1955-11-29 Glass compositions Expired GB778355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US334252XA 1954-12-29 1954-12-29

Publications (1)

Publication Number Publication Date
GB778355A true GB778355A (en) 1957-07-03

Family

ID=21870325

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34139/55A Expired GB778355A (en) 1954-12-29 1955-11-29 Glass compositions

Country Status (3)

Country Link
CH (1) CH334252A (en)
DE (1) DE1000574B (en)
GB (1) GB778355A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567104A (en) * 1983-06-24 1986-01-28 Canyon Materials Research & Engineering High energy beam colored glasses exhibiting insensitivity to actinic radiation
US4894303A (en) * 1983-06-24 1990-01-16 Canyon Materials Research & Engineering High energy beam-sensitive glasses
US6524756B1 (en) 1996-10-31 2003-02-25 Canyon Materials, Inc. Gray scale all-glass photomasks
US6562523B1 (en) 1996-10-31 2003-05-13 Canyon Materials, Inc. Direct write all-glass photomask blanks

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4732794A (en) * 1986-10-02 1988-03-22 Mobay Corporation Porcelain enamel composition and substrates coated therewith

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567104A (en) * 1983-06-24 1986-01-28 Canyon Materials Research & Engineering High energy beam colored glasses exhibiting insensitivity to actinic radiation
US4894303A (en) * 1983-06-24 1990-01-16 Canyon Materials Research & Engineering High energy beam-sensitive glasses
US6524756B1 (en) 1996-10-31 2003-02-25 Canyon Materials, Inc. Gray scale all-glass photomasks
US6562523B1 (en) 1996-10-31 2003-05-13 Canyon Materials, Inc. Direct write all-glass photomask blanks

Also Published As

Publication number Publication date
CH334252A (en) 1958-11-30
DE1000574B (en) 1957-01-10

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