FR2781475B1 - Utilisation d'un creuset en graphite poreux pour traiter des granules de silice - Google Patents

Utilisation d'un creuset en graphite poreux pour traiter des granules de silice

Info

Publication number
FR2781475B1
FR2781475B1 FR9809409A FR9809409A FR2781475B1 FR 2781475 B1 FR2781475 B1 FR 2781475B1 FR 9809409 A FR9809409 A FR 9809409A FR 9809409 A FR9809409 A FR 9809409A FR 2781475 B1 FR2781475 B1 FR 2781475B1
Authority
FR
France
Prior art keywords
graphite crucible
porous graphite
process silica
silica pellets
pellets
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 - Fee Related
Application number
FR9809409A
Other languages
English (en)
Other versions
FR2781475A1 (fr
Inventor
Jean Florent Campion
Jean Philippe Francois
Christelle Lavallade
Philippe Oskeritsian
Jean Maxime Saugrain
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
Alcatel Alsthom Compagnie Generale dElectricite
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 Alcatel Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Priority to FR9809409A priority Critical patent/FR2781475B1/fr
Priority to DE19933390A priority patent/DE19933390B4/de
Priority to JP20616899A priority patent/JP4381512B2/ja
Priority to US09/358,817 priority patent/US6319550B1/en
Publication of FR2781475A1 publication Critical patent/FR2781475A1/fr
Application granted granted Critical
Publication of FR2781475B1 publication Critical patent/FR2781475B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C03B37/01291—Manufacture of preforms for drawing fibres or filaments starting from pulverulent glass by progressive melting, e.g. melting glass powder during delivery to and adhering the so-formed melt to a target or preform, e.g. the Plasma Oxidation Deposition [POD] process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/10—Forming beads
    • C03B19/1095—Thermal after-treatment of beads, e.g. tempering, crystallisation, annealing
    • 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
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/02—Pretreated ingredients
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
    • C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
FR9809409A 1998-07-23 1998-07-23 Utilisation d'un creuset en graphite poreux pour traiter des granules de silice Expired - Fee Related FR2781475B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR9809409A FR2781475B1 (fr) 1998-07-23 1998-07-23 Utilisation d'un creuset en graphite poreux pour traiter des granules de silice
DE19933390A DE19933390B4 (de) 1998-07-23 1999-07-21 Verfahren zur Behandlung von Silikagranulat
JP20616899A JP4381512B2 (ja) 1998-07-23 1999-07-21 多孔性グラファイトるつぼを使用するシリカ顆粒の処理方法
US09/358,817 US6319550B1 (en) 1998-07-23 1999-07-22 Method and apparatus for treating silica granules using porous graphite crucible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9809409A FR2781475B1 (fr) 1998-07-23 1998-07-23 Utilisation d'un creuset en graphite poreux pour traiter des granules de silice

Publications (2)

Publication Number Publication Date
FR2781475A1 FR2781475A1 (fr) 2000-01-28
FR2781475B1 true FR2781475B1 (fr) 2000-09-08

Family

ID=9528932

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9809409A Expired - Fee Related FR2781475B1 (fr) 1998-07-23 1998-07-23 Utilisation d'un creuset en graphite poreux pour traiter des granules de silice

Country Status (4)

Country Link
US (1) US6319550B1 (fr)
JP (1) JP4381512B2 (fr)
DE (1) DE19933390B4 (fr)
FR (1) FR2781475B1 (fr)

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FR2825357B1 (fr) * 2001-05-31 2004-04-30 Cit Alcatel Procede de dopage de la silice par du fluor
US6935050B2 (en) * 2002-12-04 2005-08-30 Corning Incorporated Method and apparatus reducing metal impurities in optical fiber soot preforms
US20040118155A1 (en) * 2002-12-20 2004-06-24 Brown John T Method of making ultra-dry, Cl-free and F-doped high purity fused silica
US20050158225A1 (en) * 2004-01-20 2005-07-21 Mcgill Patrick D. Structure level of silica from silica slurry method
US9137417B2 (en) 2005-03-24 2015-09-15 Kofax, Inc. Systems and methods for processing video data
US9769354B2 (en) 2005-03-24 2017-09-19 Kofax, Inc. Systems and methods of processing scanned data
US9349046B2 (en) 2009-02-10 2016-05-24 Kofax, Inc. Smart optical input/output (I/O) extension for context-dependent workflows
US9576272B2 (en) 2009-02-10 2017-02-21 Kofax, Inc. Systems, methods and computer program products for determining document validity
US8958605B2 (en) 2009-02-10 2015-02-17 Kofax, Inc. Systems, methods and computer program products for determining document validity
US9767354B2 (en) 2009-02-10 2017-09-19 Kofax, Inc. Global geographic information retrieval, validation, and normalization
US8774516B2 (en) 2009-02-10 2014-07-08 Kofax, Inc. Systems, methods and computer program products for determining document validity
US10146795B2 (en) 2012-01-12 2018-12-04 Kofax, Inc. Systems and methods for mobile image capture and processing
US9058580B1 (en) 2012-01-12 2015-06-16 Kofax, Inc. Systems and methods for identification document processing and business workflow integration
US9058515B1 (en) 2012-01-12 2015-06-16 Kofax, Inc. Systems and methods for identification document processing and business workflow integration
US9483794B2 (en) 2012-01-12 2016-11-01 Kofax, Inc. Systems and methods for identification document processing and business workflow integration
US8989515B2 (en) 2012-01-12 2015-03-24 Kofax, Inc. Systems and methods for mobile image capture and processing
US9355312B2 (en) 2013-03-13 2016-05-31 Kofax, Inc. Systems and methods for classifying objects in digital images captured using mobile devices
WO2014160426A1 (fr) 2013-03-13 2014-10-02 Kofax, Inc. Classification des objets dans des images numériques capturées à l'aide de dispositifs mobiles
US9208536B2 (en) 2013-09-27 2015-12-08 Kofax, Inc. Systems and methods for three dimensional geometric reconstruction of captured image data
US20140316841A1 (en) 2013-04-23 2014-10-23 Kofax, Inc. Location-based workflows and services
DE202014011407U1 (de) 2013-05-03 2020-04-20 Kofax, Inc. Systeme zum Erkennen und Klassifizieren von Objekten in durch Mobilgeräte aufgenommenen Videos
DE102013112396B3 (de) * 2013-11-12 2014-11-13 Heraeus Quarzglas Gmbh & Co. Kg Verfahren zur Herstellung eines Rohlings aus Titan- und Fluor-dotiertem, hochkieselsäurehaltigem Glas
JP2016538783A (ja) 2013-11-15 2016-12-08 コファックス， インコーポレイテッド モバイル映像データを用いて長尺文書の合成画像を生成するためのシステムおよび方法
US9760788B2 (en) 2014-10-30 2017-09-12 Kofax, Inc. Mobile document detection and orientation based on reference object characteristics
US10242285B2 (en) 2015-07-20 2019-03-26 Kofax, Inc. Iterative recognition-guided thresholding and data extraction
US9779296B1 (en) 2016-04-01 2017-10-03 Kofax, Inc. Content-based detection and three dimensional geometric reconstruction of objects in image and video data
US10803350B2 (en) 2017-11-30 2020-10-13 Kofax, Inc. Object detection and image cropping using a multi-detector approach

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
GB834383A (en) * 1958-05-23 1960-05-04 Standard Telephones Cables Ltd Improvements in or relating to methods of removing impurities from silica
GB2028682B (en) * 1978-07-28 1982-08-18 Res Inst For Special Inorganic Method for producing corrosion-heat-and oxidation-resistant materials
US4477492A (en) * 1983-04-22 1984-10-16 E. I. Du Pont De Nemours And Company Process for preparing superficially porous supports for chromatography and catalysts
US4559270A (en) * 1983-07-28 1985-12-17 Union Carbide Corporation Oxidation prohibitive coatings for carbonaceous articles
DE3644057A1 (de) * 1986-12-22 1988-06-30 Vaw Ver Aluminium Werke Ag Verfahren und vorrichtung zur thermischen und/oder reduzierenden behandlung von festen, koernigen und/oder agglomerierten einsatzmaterialien
FR2632185B1 (fr) * 1988-06-01 1992-05-22 Rhone Poulenc Chimie Silice pour compositions dentifrices compatible notamment avec le zinc
US5116679A (en) * 1988-07-29 1992-05-26 Alcan International Limited Process for producing fibres composed of or coated with carbides or nitrides
DE3836934A1 (de) 1988-10-29 1990-05-03 Heraeus Schott Quarzschmelze Verfahren zum reinigen von teilchenfoermigem siliziumdioxid
JPH04325433A (ja) * 1991-04-26 1992-11-13 Furukawa Electric Co Ltd:The 光ファイバ用母材の製造方法
JP2983075B2 (ja) 1991-04-26 1999-11-29 田中貴金属工業株式会社 ヘキサアンミンイリジウムトリハイドロオキサイドの製造方法
GB9210327D0 (en) * 1992-05-14 1992-07-01 Tsl Group Plc Heat treatment facility for synthetic vitreous silica bodies
FR2693451B1 (fr) * 1992-07-07 1994-08-19 Alcatel Nv Procédé de fabrication d'une poudre de silice et application d'une telle poudre à la réalisation d'une préforme pour fibre optique.
EP0737653B1 (fr) * 1995-04-10 1998-01-14 Heraeus Quarzglas GmbH Procédé de raffinage continu de poudre de quartz
US5652017A (en) * 1996-04-10 1997-07-29 General Electric Company Method for rendering inorganic powder hydrophobic

Also Published As

Publication number Publication date
DE19933390A1 (de) 2000-01-27
US6319550B1 (en) 2001-11-20
JP2000103628A (ja) 2000-04-11
JP4381512B2 (ja) 2009-12-09
DE19933390B4 (de) 2009-04-09
FR2781475A1 (fr) 2000-01-28

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ST Notification of lapse

Effective date: 20160331