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    Sintered high-silica glass and articles comprising same
    4.
    发明授权
    Sintered high-silica glass and articles comprising same 失效
    烧结高硅石玻璃及其制品

    公开(公告)号：US4605428A

    公开(公告)日：1986-08-12

    申请号：US637492

    申请日：1984-08-03

    申请人： David W. Johnson, Jr. ,  John B. MacChesney ,  Eleizer M. Rabinovich

    发明人： David W. Johnson, Jr. ,  John B. MacChesney ,  Eleizer M. Rabinovich

    IPC分类号： C03B19/12 ,  C03B37/016 ,  C03B19/06

    CPC分类号： C03B19/12 ,  C03B37/016 ,  Y02P40/57

    摘要： High silica glass is formed by sintering a dried gel. The gel has a pore size distribution such that at most about 5% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.5 .mu.m, and such that at least 10% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.02 .mu.m. This pore size distribution permits effective migration of fluid into, and out of, the gel, permits sintering at a lower temperature, and results in increased perfection of the glass. The pore size distribution can be achieved by appropriate comminution, e.g., ball-milling, of intermediate material. A novel process for forming high silica glass is also disclosed. The process comprises forming intermediate material by hydrolysis of one or more metal alkoxides, comminuting the intermediate material to produce colloidal particles, forming a sol by dispersing the particles in liquid, gelling the sol, drying the gel, and sintering the dried gel.

    摘要翻译： 通过烧结干燥的凝胶形成高二氧化硅玻璃。 凝胶具有孔径分布，使得总孔体积的至多约5％由具有大于约0.5μm的有效孔径的孔贡献，并且使得总孔体积的至少10％由 具有大于约0.02μm的有效孔径的孔。 这种孔径分布允许流体有效地迁移到凝胶中并离开凝胶，允许在较低温度下进行烧结，并且导致玻璃的完全增加。 孔径分布可以通过中等材料的适当粉碎，例如球磨来实现。 还公开了一种用于形成高二氧化硅玻璃的新方法。 该方法包括通过一种或多种金属醇盐的水解形成中间体材料，粉碎中间体材料以产生胶体颗粒，通过将颗粒分散在液体中形成溶胶，胶凝，干燥凝胶和烧结干燥的凝胶。

    Method for fabricating articles which include high silica glass bodies
    5.
    发明授权
    Method for fabricating articles which include high silica glass bodies 失效
    包括高硅石玻璃体的制品的制造方法

    公开(公告)号：US4872895A

    公开(公告)日：1989-10-10

    申请号：US940392

    申请日：1986-12-11

    申请人： James W. Fleming ,  David W. Johnson, Jr. ,  John B. MacChesney ,  Sandra A. Pardenek

    发明人： James W. Fleming ,  David W. Johnson, Jr. ,  John B. MacChesney ,  Sandra A. Pardenek

    IPC分类号： G02B6/00 ,  C03B8/02 ,  C03B19/01 ,  C03B19/10 ,  C03B19/12 ,  C03B20/00 ,  C03B37/012 ,  C03B37/016

    CPC分类号： C03B19/12 ,  C03B19/01 ,  C03B19/1065 ,  C03B37/01291

    摘要： A method for forming articles which include silica-containing glass bodies, as well as the resulting articles, are disclosed. In accordance with the method, silica-containing gel particles are fused to form a glass body. In contrast to previous such methods, these particles are formed by mechanically, substantially uniformly subdividing either a substantially cohesive gel body, or an ungelled or partially gelled sol capable of yielding a substantially cohesive gel body, to form substantially uniformly sized, wet gel particles. Significantly, only substantially cohesive gel bodies which are also substantially elastic are useful in the invention, i.e., mechanical subdivision of non-elastic gel bodies results in these bodies undergoing plastic flow to yield non-particulate, pasty masses.

    摘要翻译： 公开了一种用于形成包括含二氧化硅的玻璃体的制品的方法以及所得到的制品。 根据该方法，将含二氧化硅的凝胶颗粒熔合以形成玻璃体。 与之前的这种方法相反，这些颗粒通过机械地，基本上均匀地细分基本上凝聚的凝胶体或能够产生基本上凝聚的凝胶体的未凝胶化或部分凝胶化的溶胶以形成基本上均匀的湿润凝胶颗粒而形成。 重要的是，也是基本上具有弹性的基本上凝聚的凝胶体在本发明中是有用的，即非弹性凝胶体的机械细分导致这些体经历塑性流动以产生非颗粒状的糊状物质。

    Optical fiber with depressed index outer cladding
    7.
    发明授权
    Optical fiber with depressed index outer cladding 失效
    具有凹陷指数外包层的光纤

    公开(公告)号：US4691990A

    公开(公告)日：1987-09-08

    申请号：US670280

    申请日：1984-11-13

    申请人： Leonard G. Cohen ,  David W. Johnson, Jr. ,  John B. MacChesney

    发明人： Leonard G. Cohen ,  David W. Johnson, Jr. ,  John B. MacChesney

    IPC分类号： G02B6/036 ,  G02B6/22

    CPC分类号： G02B6/03627 ,  G02B6/0288 ,  G02B6/03611

    摘要： Single mode and multimode silica-based optical fibers having a down-doped outer cladding are disclosed. The outer cladding material is derived from a preexisting silica tube that comprises an amount of index-lowering dopant, typically F or B, sufficient to result in an effective refractive index of the material that is at least about 0.001, preferably at least 0.0025, lower than the refractive index of SiO.sub.2. Single mode optical fiber according to the invention typically requires a smaller amount of deposited cladding material than an equivalent prior art fiber, and thus can be produced more economically. Multimode optical fiber according to the invention may have lower core doping or higher NA than equivalent prior art fiber. Down-doped substrate or sleeve tubes advantageously are produced by a gel process.

    摘要翻译： 公开了具有下掺杂外包层的单模和多模二氧化硅基光纤。 外包层材料衍生自预先存在的二氧化硅管，其包含一定量的折射率降低掺杂剂，通常为F或B，足以导致材料的有效折射率为至少约0.001，优选至少0.0025，较低 比SiO 2的折射率。 根据本发明的单模光纤通常需要比等效的现有技术光纤更少的沉积包层材料，因此可以更经济地制造。 根据本发明的多模光纤可以具有比等效的现有技术光纤更低的芯掺杂或更高的NA。 下掺杂衬底或套筒管有利地通过凝胶法制备。

    Sintered ceramic components and method for making same
    8.
    发明授权
    Sintered ceramic components and method for making same 失效
    烧结陶瓷组件及其制造方法

    公开(公告)号：US5389428A

    公开(公告)日：1995-02-14

    申请号：US987515

    申请日：1992-12-08

    申请人： Debra A. Fleming ,  Gideon S. Grader ,  David W. Johnson, Jr. ,  Henry M. O'Bryan, Jr. ,  Warren W. Rhodes

    发明人： Debra A. Fleming ,  Gideon S. Grader ,  David W. Johnson, Jr. ,  Henry M. O'Bryan, Jr. ,  Warren W. Rhodes

    IPC分类号： C04B35/622 ,  C04B35/26 ,  C04B41/87 ,  H01F17/00 ,  H01F17/04 ,  H01F27/02 ,  H01F41/16 ,  H01G4/12 ,  H01F41/02

    CPC分类号： H01F17/0033 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/027 ,  H01F41/16 ,  H01F2017/048 ,  Y10S428/90 ,  Y10T428/24917

    摘要： This invention is predicated upon applicants' discovery that conventional techniques for minimizing metal loss from sintered ceramic materials are not adequate in the fabrication of small ceramic components such as multilayer monolithic magnetic devices wherein a magnetic core is substantially surrounded by an insulating housing. Applicants have determined that this metal loss problem can be solved by providing the component with a housing layer having an appropriate concentration of metal. Specifically, if the insulating housing material around the magnetic core has, during the high temperature firing, the same partial pressure of metal as the magnetic core material, there is no net loss of metal from the core. In a preferred embodiment, loss of zinc from a MnZn ferrite core is compensated by providing a housing of NiZn ferrite or zinc aluminate with appropriate Zn concentrations. Similar considerations apply to other ceramic components.

    摘要翻译： 本发明基于申请人的发现，用于最小化烧结陶瓷材料的金属损耗的常规技术在制造小型陶瓷部件如多层单片磁性器件中是不够的，其中磁芯基本上被绝缘壳体包围。 申请人已经确定，通过为组件提供具有适当浓度金属的容纳层，可以解决该金属损失问题。 具体来说，如果磁芯周围的绝缘壳体材料在高温烧成时具有与磁心材料相同的金属分压，则不存在来自芯的金属的净损耗。 在优选的实施方案中，通过提供具有合适的Zn浓度的NiZn铁氧体或铝酸锌的壳体来补偿来自MnZn铁氧体磁心的锌的损失。 类似的考虑也适用于其他陶瓷组件。