SILICA GLASS CONTAINING TIO2 AND PROCESS FOR ITS PRODUCTION
    214.
    发明申请
    SILICA GLASS CONTAINING TIO2 AND PROCESS FOR ITS PRODUCTION 审中-公开
    二氧化硅玻璃含有TIO2及其生产工艺

    公开(公告)号:WO2004089836A1

    公开(公告)日:2004-10-21

    申请号:PCT/JP2004/004845

    申请日:2004-04-02

    Abstract: A silica glass containing TiO 2 , which has a fictive temperature of at most 1, 200 C, a F concentration of at least 100 ppm and a coefficient of thermal expansion of 0 ± 200 ppb/°c from 0 to 100°c. A process for producing a silica glass containing TiO 2 , which comprises a step of forming a porous glass body on a target quartz glass particles obtained by flame hydrolysis of glass-forming materials, a step of obtaining a fluorine-containing porous glass body, a step of obtaining a fluorine-containing vitrified glass body, a step of obtaining a fluorine-containing formed glass body and a step of carrying out annealing treatment.

    Abstract translation: 含有TiO 2的二氧化硅玻璃,其虚拟温度为至多1200℃,F浓度为至少100ppm,热膨胀系数为0±200ppb /℃,为0至100℃。 一种制备含有TiO 2的二氧化硅玻璃的方法,其包括在通过玻璃形成材料的火焰水解获得的目标石英玻璃颗粒上形成多孔玻璃体的步骤,获得含氟多​​孔玻璃体的步骤, 获得含氟玻璃化玻璃体的步骤,获得含氟成形玻璃体的步骤和进行退火处理的步骤。

    Ultralow expansion glass
    218.
    发明授权

    公开(公告)号:US09890071B2

    公开(公告)日:2018-02-13

    申请号:US15291379

    申请日:2016-10-12

    Abstract: Silica-titania glasses with small temperature variations in coefficient of thermal expansion over a wide range of zero-crossover temperatures and methods for making the glasses. The method includes a cooling protocol with controlled anneals over two different temperature regimes. A higher temperature controlled anneal may occur over a temperature interval from 750° C.-950° C. or a sub-interval thereof. A lower temperature controlled anneal may occur over a temperature interval from 650° C.-875° C. or a sub-interval thereof. The controlled anneals permit independent control over CTE slope and Tzc of silica-titania glasses. The independent control provides CTE slope and Tzc values for silica-titania glasses of fixed composition over ranges heretofore possible only through variations in composition.

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