GB1223775A - Method of strengthening glass of thin dimension - Google Patents

Method of strengthening glass of thin dimension

Info

Publication number
GB1223775A
GB1223775A GB1312969A GB1312969A GB1223775A GB 1223775 A GB1223775 A GB 1223775A GB 1312969 A GB1312969 A GB 1312969A GB 1312969 A GB1312969 A GB 1312969A GB 1223775 A GB1223775 A GB 1223775A
Authority
GB
United Kingdom
Prior art keywords
glass
stage
molten
kno
metal
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
GB1312969A
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.)
Nippon Sheet Glass Co Ltd
Original Assignee
Nippon Sheet Glass 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 Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Publication of GB1223775A publication Critical patent/GB1223775A/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
    • C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
    • C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
    • C03C21/005—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to introduce in the glass such metals or metallic ions as Ag, Cu

Landscapes

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

Abstract

1,223,775. Strengthening thin glass. NIPPON SHEET GLASS CO. Ltd. 12 March, 1969 [16 March, 1968], No. 13129/69. Heading C1M. An alkali-metal-containing glass of thickness not exceeding 1.3 mm. is strengthened by treating in a first stage with a molten alkalimetal salt whose alkali-metal ions are larger than those of the glass, and in a second stage contacting one surface only of the glass with a molten alkali metal salt whose ions are larger than those originally in the glass and simultaneously applying a D.C. voltage between the salt (which acts as the anode) and the other surface of the glass. Both stages are carried out below the deformation temperature of the glass. Preferably in the first stage a sodium glass is immersed in molten KNO 3 at 380-180‹ C. for at least 15 minutes, and in the second stage is contacted with a bath of molten KNO 3 at 350-480‹ C. for 2-030 minutes at a D.C. voltage of 10-200V. For improved electrical contact a molten metal or salt may contact the other surface of the glass. The glass body being treated may be reversed so as to treat both sides. In the second stage of the described embodiment a watch glass 1 contacts KNO 3 4 in a stainless steel vessel 2, while KNO 3 6 in a porous graphite pot 5 acts as the cathode.
GB1312969A 1968-03-16 1969-03-12 Method of strengthening glass of thin dimension Expired GB1223775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1743368 1968-03-16

Publications (1)

Publication Number Publication Date
GB1223775A true GB1223775A (en) 1971-03-03

Family

ID=11943871

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1312969A Expired GB1223775A (en) 1968-03-16 1969-03-12 Method of strengthening glass of thin dimension

Country Status (4)

Country Link
BE (1) BE729868A (en)
DE (1) DE1913136B2 (en)
FR (1) FR2004080A1 (en)
GB (1) GB1223775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8758851B2 (en) 2007-12-03 2014-06-24 Beneq Oy Method for increasing the durability of glass

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO132426C (en) * 1972-03-02 1975-11-12 Glaverbel
DK167796B1 (en) * 1984-11-13 1993-12-20 Alexander Wild EQUIPMENT FOR SELF-EFFECTIVE IRRIGATION OF PLANTED SOIL
FR3110707B1 (en) 2020-05-20 2022-06-10 Commissariat Energie Atomique Improved detector with deflection elements for coherent imaging

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8758851B2 (en) 2007-12-03 2014-06-24 Beneq Oy Method for increasing the durability of glass

Also Published As

Publication number Publication date
DE1913136A1 (en) 1969-09-25
DE1913136B2 (en) 1971-05-19
FR2004080A1 (en) 1969-11-21
BE729868A (en) 1969-08-18

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