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    OPTICAL ARTICLES AND SOL-GEL PROCESS FOR THEIR MANUFACTURE
    8.
    发明申请
    OPTICAL ARTICLES AND SOL-GEL PROCESS FOR THEIR MANUFACTURE 审中-公开
    光学文章及其制造方法

    公开(公告)号：WO2004083137A1

    公开(公告)日：2004-09-30

    申请号：PCT/EP2004/002327

    申请日：2004-03-08

    Applicant: NOVARA TECHNOLOGY S.R.L. ,  COSTA, Fulvio ,  COSTA, Lorenzo ,  GINI, Lucia

    Inventor： COSTA, Fulvio ,  COSTA, Lorenzo ,  GINI, Lucia

    IPC: C03B19/12

    CPC classification number: C03B19/12 ,  Y10T428/24802

    Abstract: An optical article, having an almost complete isotropy and dimensions equal to or lower than 500 µm, is prepared by a sol-gel procedure comprising a preliminary step wherein the mould is filled cold with a sol containing the desired oxide precursors, sol gelation, gel drying, removal of the gel from the mould and the subsequent miniaturization of the dried gel. The optical article can be used for optic telecommunications.

    Abstract translation: 具有几乎完全各向同性和尺寸等于或小于500μm的光学制品通过包括初步步骤的溶胶 - 凝胶法制备，其中模具用含有所需氧化物前体的溶胶，溶胶凝胶化，凝胶 干燥，从模具中除去凝胶，随后干燥凝胶的小型化。 光学制品可用于光通信。

    SOL-GEL PROCESS FOR THE PRODUCTION OF OPTICAL FIBER PREFORMS
    9.
    发明申请
    SOL-GEL PROCESS FOR THE PRODUCTION OF OPTICAL FIBER PREFORMS 审中-公开
    用于生产光纤预制件的溶胶凝胶工艺

    公开(公告)号：WO2003013211A2

    公开(公告)日：2003-02-20

    申请号：PCT/EP2002/004371

    申请日：2002-04-30

    Applicant: NOVARA TECHNOLOGY S.R.L.

    Inventor： COSTA, Lorenzo ,  COSTA, Fulvio ,  CREPALDI, Matteo

    IPC: C03B19/12 ,  C03B37/016

    CPC classification number: C03C3/04 ,  C03B19/12 ,  C03B37/016 ,  C03C13/00

    Abstract: Sol-gel process for the production of optical fiber preforms or overcladdings by preparing a sol, gelling the sol, drying the wet gel to a dry porous gel and densifying the dry gel to fully dense glass, wherein during the calcination treatment from 350 °C to 900 °C to remove organic impurities in the dry gel, it is carried out at least one reduced-pressure phase at a pressure comprised between about 0.01 and 0.5 bar.

    Abstract translation: 通过制备溶胶，凝胶化溶胶，将湿凝胶干燥成干多孔凝胶并将干凝胶致密化成完全致密玻璃的溶胶 - 凝胶法，其中在350℃的煅烧处理 至900℃以除去干凝胶中的有机杂质，在约0.01至0.5巴之间的压力下进行至少一个减压相。

    SILICON OXIDE BASED ARTICLES
    10.
    发明申请
    SILICON OXIDE BASED ARTICLES 审中-公开
    基于氧化硅的文章

    公开(公告)号：WO2004083138A1

    公开(公告)日：2004-09-30

    申请号：PCT/EP2004/002578

    申请日：2004-03-12

    Applicant: NOVARA TECHNOLOGY S.R.L. ,  BOARA, Giulio ,  PEDRETTI, Simone ,  RÜCKEMANN, Andreas ,  SPARPAGLIONE, Massimo

    Inventor： BOARA, Giulio ,  PEDRETTI, Simone ,  RÜCKEMANN, Andreas ,  SPARPAGLIONE, Massimo

    IPC: C03B19/12

    CPC classification number: C04B35/14 ,  C03B19/12 ,  C04B35/624 ,  C04B35/6268 ,  C04B2235/3287 ,  C04B2235/441 ,  C04B2235/444 ,  C04B2235/6023 ,  C04B2235/606 ,  Y02P40/57

    Abstract: Particularly shaped articles constituted by silicon oxide, as such or with suitable additives, prepared by room temperature molding according to a process comprising: preparation of a sol starting from a silicon alcoxide, or from a silicon alcoxide and at least a precursor of at least one of the additional elements; hydrolysis of the sol obtained thereby; addition of colloidal silica; pouring the resulting mixture into the desired mould; sol gelling and fast removal of the solid product; gel drying; gel densification by means of a thermal treatment at temperature ranging from 900 °C to 1500 °C. The articles can be used as preforms for the optical fiber spinning.

    Abstract translation: 由氧化硅本身或与适当的添加剂构成的特殊成形制品通过室温成型制备，所述方法包括：从硅烷醇硅酸钠或至少一种至少一种硅氧烷的前体制备溶胶 的附加要素; 由此得到的溶胶水解; 加入胶体二氧化硅; 将所得混合物倒入所需的模具中; 溶胶凝胶和快速去除固体产品; 凝胶干燥; 凝胶致密化，通过在900℃至1500℃的温度范围内进行热处理。 这些物品可以用作光纤纺丝的预成型件。

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