FR2359082A1 - Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling - Google Patents

Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling

Info

Publication number
FR2359082A1
FR2359082A1 FR7622528A FR7622528A FR2359082A1 FR 2359082 A1 FR2359082 A1 FR 2359082A1 FR 7622528 A FR7622528 A FR 7622528A FR 7622528 A FR7622528 A FR 7622528A FR 2359082 A1 FR2359082 A1 FR 2359082A1
Authority
FR
France
Prior art keywords
glass
crucible
mixt
cooling
fusing
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.)
Granted
Application number
FR7622528A
Other languages
French (fr)
Other versions
FR2359082B3 (en
Inventor
Jean-Paul Parant
Jean Gazet-Talvande
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Priority to FR7622528A priority Critical patent/FR2359082A1/en
Publication of FR2359082A1 publication Critical patent/FR2359082A1/en
Application granted granted Critical
Publication of FR2359082B3 publication Critical patent/FR2359082B3/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/0128—Manufacture of preforms for drawing fibres or filaments starting from pulverulent glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/09—Other methods of shaping glass by fusing powdered glass in a shaping mould
    • 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
    • C03B5/06—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in pot furnaces
    • C03B5/08—Glass-melting pots

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

Making a glass esp. a borosilicate glass consisting of melting a mixt. of powdered minerals in a silica crucible and cooling he mixt. is claimed in which, to avoid formation of fractures in the glass during cooling, the heating of the mixt. (I) also affects a second mixt. (II) of minerals melting it (II) of minerals melting it, (II) being in a second crucible surrounding the first, and in which both melts are cooled simultaneously. The second crucible is metallic, esp. of Pt. The borosilicate in the inner crucible does not contact Pt as in prior art and hence does not pick up impurities such as Fe prevent in the Pt. The Melt in the outer crucible permits the melt in the inner crucible to cool more slowly and hence the fracturing due to the difference of thermal expansion coefft. does not occur. Since the SiO2 cools at the same rate as the glass. It is thus not necessary to remove the glass from the SiO2 crucible while still hot.
FR7622528A 1976-07-23 1976-07-23 Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling Granted FR2359082A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7622528A FR2359082A1 (en) 1976-07-23 1976-07-23 Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7622528A FR2359082A1 (en) 1976-07-23 1976-07-23 Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling

Publications (2)

Publication Number Publication Date
FR2359082A1 true FR2359082A1 (en) 1978-02-17
FR2359082B3 FR2359082B3 (en) 1979-04-13

Family

ID=9176066

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7622528A Granted FR2359082A1 (en) 1976-07-23 1976-07-23 Fusing borosilicate glass in a silica crucible - using an outer platinum crucible filled with glass mixt. to prevent fracture on cooling

Country Status (1)

Country Link
FR (1) FR2359082A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521123A1 (en) * 1982-02-09 1983-08-12 Thomson Csf PROCESS FOR PRODUCING DOPED SILICA GLASS FOR OPTICAL FIBER PREFORM PREPARATION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521123A1 (en) * 1982-02-09 1983-08-12 Thomson Csf PROCESS FOR PRODUCING DOPED SILICA GLASS FOR OPTICAL FIBER PREFORM PREPARATION
EP0086132A1 (en) * 1982-02-09 1983-08-17 Thomson-Csf Method of making doped silica glass for processing a preform for an optical fibre

Also Published As

Publication number Publication date
FR2359082B3 (en) 1979-04-13

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