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    Substantially dry, silica-containing soot, fused silica and optical fiber soot preforms, apparatus, methods and burners for manufacturing same
    1.
    发明申请
    Substantially dry, silica-containing soot, fused silica and optical fiber soot preforms, apparatus, methods and burners for manufacturing same 审中-公开
    基本干燥的含二氧化硅的烟灰，熔融石英和光纤烟炱预制件，用于制造相同材料的装置，方法和燃烧器

    公开(公告)号：US20050120752A1

    公开(公告)日：2005-06-09

    申请号：US11033001

    申请日：2005-01-10

    申请人： John Brown ,  Lisa Chacon ,  Steven Dawes ,  V. Srikant ,  Pushkar Tandon ,  Joseph Whalen

    发明人： John Brown ,  Lisa Chacon ,  Steven Dawes ,  V. Srikant ,  Pushkar Tandon ,  Joseph Whalen

    IPC分类号： C03B19/14 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018

    CPC分类号： C03C3/06 ,  C03B19/1407 ,  C03B19/1415 ,  C03B19/1423 ,  C03B19/1453 ,  C03B37/01202 ,  C03B37/01406 ,  C03B37/01413 ,  C03B37/0142 ,  C03B37/0146 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2207/02 ,  C03B2207/06 ,  C03B2207/08 ,  C03B2207/14 ,  C03B2207/20 ,  C03B2207/30 ,  C03B2207/42 ,  C03B2207/70 ,  C03B2207/81

    摘要： Methods, apparatus and precursors for producing substantially water-free silica soot, preforms and glass. The methods and apparatus make substantially water-free fused silica preforms or glass by removing water as a reaction product, removing water from the atmosphere, removing water from the transport process, or combinations thereof. In a first embodiment, substantially water-free soot, preforms or glass are achieved by using a hydrogen-free fuel, such as carbon monoxide, in the deposition process. In another embodiment, a soot producing burner has parameters that enable operation on a substantially hydrogen-free fuel. End burners, which minimize water production, are also described. Such water-free methods are useful in depositing fluorine-doped soot because of the low water present and the efficiency in which fluorine is incorporated. In another embodiment, glassy barrier layer methods and apparatus are described for minimizing dopant migration, especially fluorine. Laser and induction methods and apparatus for forming the barrier layer are depicted. A chlorine, fluorine and silica precursor, such as chlorofluorosilane, may be utilized to form fluorinated soot. Other methods and apparatus are directed to combinations of conventional and substantially water-free processes. One embodiment is directed to combustion enhancing additives for addition to the substantially hydrogen-free fuels. The methods and apparatus in accordance with the invention are particularly useful for producing photomask substrates and optical fiber preforms.

    摘要翻译： 用于生产基本上无水的二氧化硅烟灰，预成型件和玻璃的方法，装置和前体。 该方法和装置通过除去水作为反应产物，从大气中除去水分，从运输过程中除去水或其组合，从而使基本上无水的熔融二氧化硅预制件或玻璃。 在第一实施方案中，在沉积工艺中通过使用无氢燃料如一氧化碳来实现基本上无水的烟灰，预型体或玻璃。 在另一个实施方案中，产生烟灰的燃烧器具有能够在基本上无氢燃料上操作的参数。 还描述了最小化水的生产的终端燃烧器。 这种无水方法由于存在低的水和掺入氟的效率而用于沉积氟掺杂烟灰。 在另一个实施例中，描述了用于最小化掺杂剂迁移，特别是氟的玻璃状阻挡层方法和装置。 描述了用于形成阻挡层的激光和感应方法和装置。 可以使用氯，氟和二氧化硅前体，例如氯氟硅烷来形成氟化烟灰。 其它方法和装置涉及常规和基本无水方法的组合。 一个实施方案涉及用于加入基本上无氢燃料的燃烧增强添加剂。 根据本发明的方法和装置特别适用于制造光掩模基片和光纤预制棒。

    Method for preparing catalysts
    3.
    发明申请
    Method for preparing catalysts 失效
    制备催化剂的方法

    公开(公告)号：US20050136183A1

    公开(公告)日：2005-06-23

    申请号：US10742279

    申请日：2003-12-18

    申请人： Steven Dawes ,  Prantik Mazumder

    发明人： Steven Dawes ,  Prantik Mazumder

    IPC分类号： B01J20/00 ,  B01J21/04 ,  B01J21/08 ,  B01J21/12 ,  B01J21/14 ,  B01J23/00 ,  B01J23/02 ,  B01J23/40 ,  B01J23/42 ,  B01J27/19 ,  B01J35/04 ,  B01J37/02 ,  B05D1/18 ,  B05D3/00

    CPC分类号： B01J35/04 ,  B01J37/0201 ,  B01J37/0211 ,  B01J37/0215

    摘要： A method for impregnating porous monolith supports with catalytically active materials is disclosed. The impregnation is carried out at a temperature which substantially reduces chemisorption rates such that reactions between the monolith substrate and catalytically active materials in the catalyst solution are minimized. The process can be completed in a practical time that allows for unit selectivity of the weight ratio of catalytically active materials in the substrate to the weight ratio of catalytically active materials in the catalyst solution.

    摘要翻译： 公开了一种用催化活性材料浸渍多孔整料载体的方法。 浸渍在基本上降低化学吸附速率的温度下进行，使得催化剂溶液中的整料衬底和催化活性材料之间的反应最小化。 该过程可以在实际的时间内完成，其允许衬底中催化活性材料的重量比与催化剂溶液中催化活性材料的重量比的单位选择性。

    Doped silica glass articles and methods of forming doped silica glass boules and articles
    4.
    发明申请
    Doped silica glass articles and methods of forming doped silica glass boules and articles 有权
    掺杂的二氧化硅玻璃制品和形成掺杂的石英玻璃微珠和制品的方法

    公开(公告)号：US20070042892A1

    公开(公告)日：2007-02-22

    申请号：US11589584

    申请日：2006-10-30

    申请人： Steven Dawes ,  Richard Fiacco ,  Kenneth Hrdina ,  Michael Wasilewski

    发明人： Steven Dawes ,  Richard Fiacco ,  Kenneth Hrdina ,  Michael Wasilewski

    IPC分类号： C03C3/06

    CPC分类号： C03B19/06 ,  C03B19/02 ,  C03B19/12 ,  C03B2201/42 ,  C03C3/06 ,  C03C2201/42 ,  C03C2203/20

    摘要： The present invention provides doped titania-doped silica glass articles having low thermal expansions and low variations in thermal expansion. According to one embodiment of the invention, a titania-doped silica glass article has a titania content of between about 5 wt % and about 9 wt %; a coefficient of thermal expansion of between about −30 ppb/° C. and about +30 ppb/° C. at a temperature between 15° C. and 30° C.; and a variation in coefficient of thermal expansion of less than about 5 ppb/° C. at a temperature between 15° C and 30° C.

    摘要翻译： 本发明提供了具有低热膨胀和低膨胀变化的掺杂二氧化钛掺杂二氧化硅玻璃制品。 根据本发明的一个实施方案，二氧化钛掺杂的石英玻璃制品的二氧化钛含量为约5重量％至约9重量％; 在15℃和30℃之间的温度下，热膨胀系数在约-30ppb /℃和约+ 30ppb /℃之间。 和在15℃至30℃之间的温度下热膨胀系数的变化小于约5ppb /℃。