Method for fabricating porous silicapreform and porous silica preform
    52.
    发明申请
    Method for fabricating porous silicapreform and porous silica preform 有权
    制造多孔硅酸盐和多孔二氧化硅预制件的方法

    公开(公告)号:US20050109065A1

    公开(公告)日:2005-05-26

    申请号:US10983599

    申请日:2004-11-09

    摘要: A method for fabricating a porous silica preform includes the steps of supplying fuel gas for generating an oxyhydrogen flame to a glass synthesizing burner; supplying Gas A containing silicon and Gas B containing fluorine to the burner; synthesizing glass particles; and depositing the glass particles around a starting rod, in which when glass particles are deposited directly on the starting rod, a supply of Gas A and a supply of Gas B supplied to the burner are adjusted so that a ratio of the number of fluorine atoms to the number of silicon atoms in the gas supplied to the burner satisfies the following Formula (1): {(number of F atoms)/(number of Si atoms)}≦0.1  (1)

    摘要翻译: 制造多孔二氧化硅预制件的方法包括以下步骤:向玻璃合成燃烧器提供产生氢氧焰的燃料气体; 将含有硅的气体A和含氟的气体B供应到燃烧器; 合成玻璃颗粒; 并且将玻璃颗粒沉积在起始棒周围,其中当玻璃颗粒直接沉积在起始棒上时,调节供应气体A和供应到燃烧器的气体B的供应,使得氟原子数 提供给燃烧器的气体中的硅原子数满足下式(1):&lt;线内公式描述=“在线公式”end =“lead”?> {((F原子数) /(Si原子数)} <= 0.1(1)<?in-line-formula description =“In-line Formulas”end =“tail”?>

    Method for the production of a quartz glass blank and apparatus suitable
therefor
    56.
    发明授权
    Method for the production of a quartz glass blank and apparatus suitable therefor 失效
    生产石英玻璃坯料的方法及适用的方法

    公开(公告)号:US6079225A

    公开(公告)日:2000-06-27

    申请号:US099894

    申请日:1998-06-18

    IPC分类号: C03B8/04 C03B19/14 C03B20/00

    摘要: In a known method, a quartz glass preform is produced by supplying a glass-forming base material in liquid form to an injection nozzle of a multi-nozzle flame deposition burner, vaporizing or gasifying the liquid glass-forming base material in the deposition burner, mixing the vaporized or gasified glass-forming base material with a gas containing oxygen under creation of SiO.sub.2 particles in a chemical reaction, deposition of the SiO.sub.2 particles on a substrate under creation of a porous preform and sintering of the preform. In this method, expensive devices such as pumps and ultrasonic vaporizers are needed for the vaporization of the liquid glass-forming base material; in addition, these devices are subject to mechanical wear and chemical attack and furthermore, they require extensive maintenance and due to their size result in a great height of construction. In order to avoid these disadvantages, a method is proposed according to the invention wherein a gas for the creation of a mist is fed to the deposition burner for the vaporization or gasification of the glass-forming base material, resulting in the creation of a low pressure in the area of the injection nozzle orifice. In an apparatus suitable for implementing the method, a vaporizing device comprises a vaporizing nozzle for the supply of a vaporizing gas, said nozzle being located adjacent to the injection nozzle and having an opening which, as seen in the direction of travel of the vaporizing gas, extends in a plane behind the injection nozzle opening.

    摘要翻译: 在已知的方法中,通过将液体形式的玻璃形成基材料供给到多喷嘴火焰沉积燃烧器的喷嘴,在沉积燃烧器中蒸发或气化液态玻璃形成基材来制造石英玻璃预制件, 在蒸发或气化的玻璃形成基材与化学反应中产生SiO 2颗粒的气体中混合气化的玻璃形成基材,在形成多孔预型体的同时将SiO 2颗粒沉积在基材上并烧结预型体。 在这种方法中,液体玻璃形成基材的汽化需要昂贵的装置如泵和超声波蒸发器; 此外,这些装置受到机械磨损和化学侵蚀,此外,它们需要广泛的维护,并且由于其尺寸导致很高的结构高度。 为了避免这些缺点,提出了根据本发明的方法,其中用于产生雾的气体被供给到用于玻璃形成基材的蒸发或气化的沉积燃烧器,导致产生低的 喷嘴孔口的压力。 在适于实施该方法的装置中,蒸发装置包括用于供应汽化气体的蒸发喷嘴,所述喷嘴位于喷嘴附近,并且具有开口,该开口沿蒸发气体的行进方向 在喷嘴开口后面的平面内延伸。

    Preparation of a preform of optical fibers
    58.
    发明授权
    Preparation of a preform of optical fibers 失效
    制备光纤预制棒

    公开(公告)号:US5366531A

    公开(公告)日:1994-11-22

    申请号:US131450

    申请日:1993-10-04

    摘要: An improvement is proposed in the method for the flame hydrolysis of a silicon-containing gas, e.g., silicon tetrachloride, to produce fine silica particles to be deposited on a substrate in a process for the preparation of a silica glass preform of optical fibers by using a fivefold concentric multiplex-tube burner nozzle. In contrast to the conventional way for the flame hydrolysis in which the center or first nozzle opening of the burner serves for ejection of a mixture of silicon tetrachloride and oxygen and hydrogen is ejected from the third nozzle opening while argon is ejected from the second nozzle opening inbetween, the gas ejected from the second nozzle opening is, instead of argon alone, a mixture of oxygen and argon in a specified mixing proportion so that deposition of silica particles on the nozzle end can be prevented even when the feed rate of silicon tetrachloride is relatively high.

    摘要翻译: 在用于制备光纤石英玻璃预制棒的方法中,在含硅气体例如四氯化硅的火焰水解方法中提出了一种改进方法,以制备沉积在基材上的细二氧化硅颗粒 一个五重同心多重管燃烧器喷嘴。 与用于火焰水解的常规方法相比,其中燃烧器的中心或第一喷嘴开口用于喷射四氯化硅和氧气的混合物,并且从第三喷嘴开口喷射氢气,同时从第二喷嘴开口喷出氩气 在其间,从第二喷嘴开口排出的气体是以指定的混合比例代替仅含氩和氩的混合物,从而即使当四氯化硅的进料速率为 比较高

    Method of fabricating optical fiber preforms
    59.
    发明授权
    Method of fabricating optical fiber preforms 失效
    制造光纤预制棒的方法

    公开(公告)号:US4915717A

    公开(公告)日:1990-04-10

    申请号:US577405

    申请日:1984-02-06

    IPC分类号: C03B37/014

    摘要: An improved method for fabricating an optical fiber preform by the vapor phase axial deposition (VAD) method, comprises forming core and cladding soots at the same time by the use of core and cladding burners. The improvement is that the cladding burner is designed so that at least one of the outlets for a feed material gas, a fuel gas, an auxiliary fuel gas, and an inert gas is composed of a plurality of openings. In this improved method, the temperature distribution from the boundary of the core soot to the periphery of the cladding soot is made smooth, and thus the cladding soot is prevented from cracking.

    摘要翻译: 通过气相轴向沉积(VAD)方法制造光纤预制件的改进方法包括通过使用芯和包层燃烧器同时形成芯和包覆烟灰。 改进之处在于,包层燃烧器被设计成使得用于进料材料气体,燃料气体,辅助燃料气体和惰性气体的出口中的至少一个由多个开口组成。 在这种改进的方法中,从核心烟灰的边界到包层烟灰的周边的温度分布变得平滑,因此防止了包层烟灰的破裂。

    Torch for fabricating optical fiber preform
    60.
    发明授权
    Torch for fabricating optical fiber preform 失效
    用于制造光纤预制棒的手电筒

    公开(公告)号:US4810189A

    公开(公告)日:1989-03-07

    申请号:US13088

    申请日:1987-02-10

    摘要: A torch for fabricating an optical fiber perform which has a plurality of raw gas injection passages at the center of the torch, a plurality of small-diameter combustion supporting gas injection passages independent of each other and disposed to surround the raw gas injection passages on the outer periphery of the raw gas injection passages disposed at the center of the torch, and an annular combustible gas injection passage disposed around the small-diameter combustion supporting gas injection passages. Thus, the torch can stably manufacture porous glass preforms.

    摘要翻译: 一种用于制造光纤的手电筒,其具有在炬的中心处的多个原料气体注入通道,多个小直径燃烧支持气体注入通道彼此独立并且设置成围绕在该喷嘴的原料气体注入通道 设置在割炬中心处的原料气体注入通道的外周和设置在小直径燃烧支持气体注入通道周围的环形可燃气体注入通道。 因此,手电筒可以稳定地制造多孔玻璃预制件。