Method and apparatus for minimizing air infiltration in the production of fused silica glass

    公开(公告)号:US06463761B2

    公开(公告)日:2002-10-15

    申请号:US09971249

    申请日:2001-10-03

    IPC分类号: C03B1906

    摘要: Fused silica boules (19) having improved radial homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a cup-like containment vessel (13) which collects silica particles from a plurality of burners (14). The containment vessel (13) rotates and oscillates relative to the burners (14) as the boule (19) is formed. The containment vessel (13) is bounded by a cup-like containment wall (22), and a shadow or air flow wall (130) is spaced apart from and surrounds the containment wall (22) forming a gap or air flow passage (175) therebetween. A radially-outwardly extending deflecting wedge portion (23) is formed at the upper extent of the containment wall (22) and at an outlet end of flow passage (175). An upwardly and outwardly tapered surface (131) at the upper end of the air flow wall (130) complements an upwardly and outwardly deflection surface (123) formed on the deflection wedge (23) to form a radially-outwardly and upwardly flow passage (176) for discharging the flow from passage (175). The radially-outwardly and upwardly directed flow passage (176) deflects air infiltrated through the passage (175) outwardly away from the boule (19) so as to reduce and minimize the effects of infiltrated air on the boule.

    Apparatus for minimizing air infiltration in the production of fused silica glass
    6.
    发明授权
    Apparatus for minimizing air infiltration in the production of fused silica glass 失效
    用于最小化熔融石英玻璃生产中的空气渗透的装置

    公开(公告)号:US06314766B1

    公开(公告)日:2001-11-13

    申请号:US09487011

    申请日:2000-01-19

    IPC分类号: C03B37018

    摘要: Fused silica boules (19) having improved radial homogeneity are produced by controlling the air flow around the boule (19) during its formation. The boule is formed in a cup-like containment vessel (13) which collects silica particles from a plurality of burners (14). The containment vessel (13) rotates and oscillates relative to the burners (14) as the boule (19) is formed. The containment vessel (13) is bounded by a cup-like containment wall (22), and a shadow or air flow wall (130) is spaced apart from and surrounds the containment wall (22) forming a gap or air flow passage (175) therebetween. A radially-outwardly extending deflecting wedge portion (23) is formed at the upper extent of the containment wall (22) and at an outlet end of flow passage (175). An upwardly and outwardly tapered surface (131) at the upper end of the air flow wall (130) complements an upwardly and outwardly deflection surface (123) formed on the deflection wedge (23) to form a radially-outwardly and upwardly flow passage (176) for discharging the flow from passage (175). The radially-outwardly and upwardly directed flow passage (176) deflects air infiltrated through the passage (175) outwardly away from the boule (19) so as to reduce and minimize the effects of infiltrated air on the boule.

    摘要翻译: 具有改善的径向均匀性的熔融二氧化硅凝胶(19)通过在其形成期间控制围绕坯料(19)的空气流而产生。 该杯状物形成在从多个燃烧器(14)收集二氧化硅颗粒的杯状容纳容器(13)中。 容纳容器(13)随着形成有毛坯(19)而相对于燃烧器(14)旋转和摆动。 容纳容器(13)由杯状容纳壁(22)限定,并且阴影或空气流动壁(130)与容纳壁(22)间隔开并围绕形成间隙或气流通道(175) )。 径向向外延伸的偏转楔形部分(23)形成在容纳壁(22)的上部和流动通道(175)的出口端处。 在空气流动壁(130)的上端处的向上和向外的锥形表面(131)与形成在偏转楔(23)上的向上和向外偏转表面(123)互补,以形成径向向外和向上流动的通道 176),用于从通道(175)排出流。 径向向外和向上引导的流动通道(176)将通过通道(175)渗入的空气向外偏转离开毛坯(19),以便减少和最小化渗透的空气对毛坯的影响。