Process for making opaque quartz, for carrying out the process suitable SiO2 granulate, and component of opaque quartz glass
    42.
    发明授权
    Process for making opaque quartz, for carrying out the process suitable SiO2 granulate, and component of opaque quartz glass 有权
    制造不透明石英的方法,用于进行适合SiO 2颗粒的工艺,以及不透明石英玻璃的组分

    公开(公告)号:US06380110B1

    公开(公告)日:2002-04-30

    申请号:US09484113

    申请日:2000-01-14

    Abstract: In a known process for the production of opaque quartz glass a blank is formed from synthetic SiO2 granulate and is heated at a vitrification temperature to form a body of opaque quartz glass. In order to provide on this basis a process for the production of pure opaque quartz glass with a homogenous pore distribution, high density, high viscosity and a low tendency to devitrify, it is proposed according to the invention that the SiO2 granulate to be used is a SiO2 granulate (21; 31) composed of at least partially porous agglomerates of SiO2 primary particles, with a specific BET surface ranging from 1.5 m2/g to 40 m2/g and an apparent density of at least 0.8 g/cm3. A SiO2 granulate (21; 31) suitable for the implementation of the process is distinguished in that it is formed from at least partially porous agglomerates of SiO2 primary particles and in that it has a specific BET surface ranging from 1.5 m2/g to 40 m2/g and an apparent density of at least 0.6 g/cm3.

    Abstract translation: 在制造不透明石英玻璃的已知方法中,由合成SiO 2颗粒形成坯料,并在玻璃化温度下加热以形成不透明石英玻璃体。 为了在此基础上提供具有均匀孔分布,高密度,高粘度和低失透倾向的纯不透明石英玻璃的制备方法,根据本发明提出使用的SiO 2颗粒是 SiO 2颗粒(21; 31),其由SiO 2一次颗粒的至少部分多孔的附聚物组成,BET比表面积为1.5m 2 / g至40m 2 / g,表观密度为至少0.8g / cm 3。 适用于实施该方法的SiO 2颗粒(21; 31)的特征在于其由SiO 2一次颗粒的至少部分多孔的附聚物形成,并且其具有范围为1.5m 2 / g至40m 2的比BET表面积 / g,表观密度为0.6g / cm 3以上。

    Quartz glass, heat treating apparatus using quartz glass, and heat treating method

    公开(公告)号:US20010029006A1

    公开(公告)日:2001-10-11

    申请号:US09871979

    申请日:2001-06-04

    Abstract: A quartz glass which would not become a source for the contamination even if it contains metallic impurities. This quartz glass includes a region where a concentration of Enull center as measured by means of an electron spin resonance analysis is 3null1019 cmnull3 or more. This quartz glass can be manufactured by a method including the steps of forming an initial quartz glass by melting and quenching a raw material for quartz glass, and implanting therein an ion, which is capable of entering into an SiO2 network of the initial quartz glass and substantially incapable of externally diffusing, to increase a concentration of Enull center in at least part of the initial quartz glass. This quartz glass can be manufactured by a method making use of a quartz glass raw material containing 0.01 to 0.1% by weight of silicon, by a method of irradiating ultraviolet ray to the initial quartz glass, or by a method of giving an abrasion damage to the surface of the initial quartz glass by means of sand blast.

    Surface Nitrided Alkali-Free Glasses
    47.
    发明申请
    Surface Nitrided Alkali-Free Glasses 有权
    表面无氮化玻璃

    公开(公告)号:US20150329408A1

    公开(公告)日:2015-11-19

    申请号:US14710130

    申请日:2015-05-12

    Abstract: Alkali-free glasses are disclosed having (in weight %) 50≦SiO2≦80%, 2≦Al2O3≦17%, 8≦B2O3≦36%, and greater than or equal to 2% and less than or equal to 25% of at least one of CaO, MgO, BaO, SrO or ZnO. The alkali-free glasses can have a surface layer with greater than 0.2 weight % N. Such alkali-free glasses are achieved by nitriding processes and exhibit increased strength, scratch resistance and chemical durability.

    Abstract translation: 公开了无碱玻璃,其重量百分比为50%,SiO 2和N 100; 80%,2%,Al 2 O 3和N 2; 17%,8%和10%; B 2 O 3和N 3; 36%,并且大于或等于2%且小于或等于 CaO,MgO,BaO,SrO或ZnO中的至少一种。 无碱玻璃可以具有大于0.2重量%N的表面层。这种无碱玻璃通过渗氮工艺实现,并且显示出增加的强度,耐划伤性和化学耐久性。

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