Synthetic quartz glass and production process
    73.
    发明申请
    Synthetic quartz glass and production process 失效
    合成石英玻璃及生产工艺

    公开(公告)号:US20010018834A1

    公开(公告)日:2001-09-06

    申请号:US09747953

    申请日:2000-12-27

    Abstract: A process for producing synthetic quartz glass using a burner composed of a plurality of concentric nozzles involves the steps of feeding a silica-forming raw material gas and a fluorine compound gas to a reaction zone from a center nozzle, feeding oxygen gas from a second nozzle outside the center nozzle, and feeding oxygen gas and/or hydrogen gas from a third nozzle. The silica-forming raw material gas is hydrolyzed to form fine particles of silica, which particles are deposited on a rotatable substrate so as to form a porous silica matrix, which is then fused to give the quartz glass. The flow rate of the oxygen gas fed from the second nozzle and the flow rate of the raw material gas are controlled so as to provide a 1.1- to 3.5-fold stoichiometric excess of oxygen. The excess oxygen suppresses SinullSi bond formation in the quartz glass, enabling the production of synthetic quartz glass having a high transmittance in the vacuum ultraviolet region.

    Abstract translation: 使用由多个同心喷嘴构成的燃烧器来生产合成石英玻璃的方法包括以下步骤:将来自中心喷嘴的二氧化硅生成原料气体和氟化合物气体供给到反应区域,从第二喷嘴 在中心喷嘴外部,并且从第三喷嘴供给氧气和/或氢气。 二氧化硅形成原料气体被水解以形成二氧化硅细颗粒,该颗粒沉积在可转动的基底上,以便形成多孔二氧化硅基质,然后熔化以得到石英玻璃。 控制从第二喷嘴供给的氧气的流量和原料气体的流量,从而提供1.1-3.5倍化学计量的过量的氧气。 过量的氧抑制石英玻璃中的Si-Si键的形成,能够在真空紫外线区域中制造具有高透射率的合成石英玻璃。

    Method for manufacturing fused quartz glass
    80.
    发明授权
    Method for manufacturing fused quartz glass 失效
    熔融石英玻璃的制造方法

    公开(公告)号:US4432781A

    公开(公告)日:1984-02-21

    申请号:US352856

    申请日:1982-02-26

    CPC classification number: C03B19/1415 C03B2201/23 C03B2207/38

    Abstract: The invention provides a novel method for manufacturing fused quartz glass by the decomposition and oxidation of a vaporizable silicon compound such as silicon tetrachloride in a plasma flame according to which the quartz glass rod produced contains a controlled amount of hydroxy groups with high reproducibility. The principle of the inventive method consists in the admixture of gaseous hydrogen chloride into the gaseous reactant mixture or in the plasma-supporting gas as the source for the hydrogen atoms to be converted to the hydroxy groups in place of hydrogen gas or water vapor as the hydrogen source. Good proportionality is established between the concentration of the hydrogen chloride in the gaseous feed and the hydroxy content in the resultant fused quartz glass rod.

    Abstract translation: 本发明提供了一种通过在等离子体火焰中分解和氧化可蒸发硅化合物如四氯化硅来制造熔融石英玻璃的新方法,根据该方法,所生产的石英玻璃棒含有可控量的具有高再现性的羟基。 本发明方法的原理在于将气态氯化氢混合到气态反应物混合物中或在等离子体载气中,作为氢原子的原子转化为羟基而不是氢气或水蒸汽作为 氢源。 在气态进料中的氯化氢浓度与所得的熔融石英玻璃棒中的羟基含量之间建立了良好的比例关系。

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