Method of densifying metal oxides
    155.
    发明授权
    Method of densifying metal oxides 失效
    致密金属氧化物的方法

    公开(公告)号:US4126422A

    公开(公告)日:1978-11-21

    申请号:US680452

    申请日:1976-04-26

    Inventor: Lewis H. Brandes

    Abstract: A method for densifying a fumed metal oxide of Groups III and IV prepared by either a vapor phase oxidation or combustion process is disclosed wherein the metal oxide is mixed with a polar liquid in a high shear mixer, the metal oxide being present in an amount of about 35-50%, to convert it into a granulated material which, when dried, will substantially all pass through a 10 mesh screen. The granulated material may then be calcined preparatory to wet milling to prepare a casting slip, or it may be vitrified directly for molding or drawing in known manner.

    Abstract translation: 公开了一种致密化通过气相氧化或燃烧方法制备的III和IV族热解金属氧化物的方法,其中金属氧化物与高剪切混合器中的极性液体混合,金属氧化物以 约35-50%,将其转化成粒状材料,当干燥时,其将基本上全部通过10目筛网。 然后可以将造粒材料煅烧准备湿法研磨以制备流延滑移,或者可以以已知的方式直接玻璃化以进行模制或拉伸。

    Low temperature production of high purity fused silica
    157.
    发明授权
    Low temperature production of high purity fused silica 失效
    低温生产高纯度熔融石英

    公开(公告)号:US4059658A

    公开(公告)日:1977-11-22

    申请号:US613202

    申请日:1975-09-15

    Abstract: The instant invention is directed to the production of high purity fused silica bodies by means of a three-step process. In the first step, various specifically-defined ratios of aqueous alkali metal silicates with colloidal silica or quaternary ammonium silicate are gelled with certain organic reagents. In the second step, the gelled silicate mass is leached in weakly acid solutions to yield bodies of very high porosity, i.e., greater than 50%, with mean pore diameters ranging between about 400A-4000A, but wherein the pore diameters are extraordinarily uniform within a particular body. Lastly, the microporous body is fired briefly at temperatures above about 1350.degree. C. to consolidate the body to a solid transparent fused silica article having alkali metal contents less than 100 parts per million (PPM). The size of the pores, combined with the exceptional uniformity of pore sizes within an individual unit, is vital to achieve crack-free, homogeneous products.

    Abstract translation: 本发明涉及通过三步法生产高纯度熔融石英体。 在第一步中,具有胶体二氧化硅或季铵硅酸盐的碱金属硅酸盐水溶液的各种特定比例用某些有机试剂凝胶化。 在第二步中,将凝胶状硅酸盐物质在弱酸溶液中浸出,以产生非常高孔隙率的物体,即大于50%,平均孔径在约400A-4000A之间,但是其孔径特别均匀 一个特定的身体 最后,在高于约1350℃的温度下短暂地烧结微孔体,以将体固化成具有小于100ppm(PPM)的碱金属含量的固体透明熔融石英制品。 孔的尺寸,加上单个单元内孔径的均匀性是非常重要的,以获得无裂纹的均质产品。

    Method of making optical waveguides
    158.
    发明授权
    Method of making optical waveguides 失效
    制造光波导的方法

    公开(公告)号:US3933454A

    公开(公告)日:1976-01-20

    申请号:US462962

    申请日:1974-04-22

    Inventor: Robert D. DeLuca

    Abstract: A method of making low loss glass optical waveguides, wherein at least one coating of glass soot is deposited by the flame hydrolysis process on a starting member. The soot coating is heated to its consolidation temperature in an atmosphere containing helium and an amount of chlorine that is effective to substantially remove the water from the glass soot while the soot is being consolidated to form a dense glass layer. The starting member is removed unless it is to form a part of the optical waveguide. The resultant structure, including the dense glass body, is then drawn into a waveguide fiber.

    Abstract translation: 一种制造低损耗玻璃光波导的方法,其中玻璃烟灰的至少一个涂层通过火焰水解过程沉积在起始构件上。 烟炱涂层在含有氦气和一定量的氯气的气氛中被加热到其固化温度,其在烟灰被固结形成致密的玻璃层的同时有效地从玻璃烟灰中去除水分。 起始构件除去,除非形成光波导的一部分。 然后将包括致密玻璃体的所得结构拉入波导纤维。

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