-
1.发明授权
公开(公告)号：US5221306A
公开(公告)日：1993-06-22
申请号：US607020
申请日：1990-10-31
IPC分类号： C03B23/043 , C03B23/057 , C03B29/02 , C03B37/012 , C03B37/014 , C03B37/018 , G02B6/00
CPC分类号： C03B37/01228 , C03B23/043 , C03B23/057 , C03B29/02 , C03B37/01257 , C03B37/01446 , C03B37/01466 , C03B37/0148 , C03B37/01861 , C03B37/01884 , Y02P40/57 , Y10T82/10 , Y10T82/2502
摘要： The transverse cross section of a body is modified by the steps of: a) determining the extent to which the body has material in excess of a desired shape at a plurality of points, b) exposing the body to a local heat source having a temperature sufficiently high to remove material from the surface of the body, and c) moving the surface of the body in relation to the source at a speed which decreases in regions where the body has material in excess of the desired shape so as to remove more material from such regions than from other regions. In a preferred embodiment, the body is an optical fiber preform, the local heat source is the fireball of a plasma torch, and the body is moved relative to the torch by rotating the preform at a controllable angular velocity while the torch is translated along the length of the preform.
摘要翻译： 通过以下步骤修改身体的横截面：a）确定身体在多个点处具有超过所需形状的材料的程度，b）将身体暴露于具有温度的局部热源 足够高以从身体的表面去除材料，以及c）以主体具有超过所需形状的材料的区域减小的速度相对于源移动身体的表面，以便去除更多的材料 来自其他地区。 在优选实施例中，主体是光纤预制件，局部热源是等离子体焰炬的火球，并且通过以可控的角速度旋转预制件，主体通过旋转预制件而相对于炬移动，同时割炬沿着 预成型件的长度。
-
2.发明授权
公开(公告)号：US5000771A
公开(公告)日：1991-03-19
申请号：US458921
申请日：1989-12-29
IPC分类号： G02B6/00 , C03B29/02 , C03B37/012 , C03B37/014
CPC分类号： C03B37/0148 , C03B37/01205 , C03B37/01237 , C03B37/01257 , C03B37/01446
摘要： To attain high strength optical glass fibers, the glass preforms, from which the fibers are drawn, must generally be free of surface imperfections such as bubbles, and air lines. It has been discovered that these imperfections can be removed quickly and cleanly by contacting the preform surface with a substantial portion of the electrically conducting plasma region (the plasma fireball) extending from a plasma torch. Significantly, the surface material is substantially removed by vaporization, due to the extremely high plasma temperature (>9000.degree. C. at the plasma center) of the isothermal plasma torch. Though the temperatures in the tail of the plasma fireball are substantially less than at the plasma center, the temperatures are generally still several thousand degrees centigrade. These tail temperatures typically are sufficiently high to cause vaporization of most refractory dielectrics making the inventive method applicable to the fabrication of a wide variety of articles comprising refractory dielectric bodies.Advantageously, selective etching, according to one aspect of the inventive method, is used to remove fiber preform eccentricity and to fabricate optical fiber preforms with non-circular cross-sections for such applications as fiber sensors. Selective etching can result by controlling the plasma fireball location, the rotation of the silica preform, and/or the travel of the fireball across the preform. Significantly, the fireball location is controlled, among other ways, by injecting into the torch an additional gas that has a high ionization threshold or by inserting a probe along the axis of the torch. In either case, a substantial portion of the plasma fireball is advantageously "pushed" outside the torch for ease of contact with the silica preform surface, or any other refractory dielectric being processed.
-
3.发明授权Process of manufacturing vitreous silica product including hydrothermally treating a colloidal sol-gel 失效制造玻璃状二氧化硅产品的方法，包括水热处理胶体溶胶 - 凝胶
公开(公告)号：US5562752A
公开(公告)日：1996-10-08
申请号：US221114
申请日：1994-03-31
IPC分类号： C03B19/12 , C03B37/016
CPC分类号： C03B19/12 , C03B37/016
摘要： Heating a wet colloidal gel body in an autoclave above its 1-atmosphere boiling point, under rigorously defined conditions, avoids shrinkage during subsequent drying. As a consequence, drying rates may be increased, and handling care becomes less critical.
摘要翻译： 在严格限定的条件下，将高压釜中的湿胶体凝胶体加热至高于其1-大气沸点，避免后续干燥期间的收缩。 因此，可以增加干燥速率，并且处理护理变得不那么关键。
-
公开(公告)号：US4379616A
公开(公告)日：1983-04-12
申请号：US259431
申请日：1981-05-01
CPC分类号： C03C13/048 , C03C13/046
摘要： Aluminum metaphosphate optical fibers are disclosed. In a specific embodiment, aluminum metaphosphate, doped with from 10 to 30 mole percent of diboron trioxide, is found to yield an optical fiber which combines the desirable properties of both high numerical aperture and low material dispersion. The fiber is nonhygroscopic and has a high melting temperature. The index of refraction of the glass may be lowered by doping with silicon dioxide. Consequently, a graded fiber may be made by increasing the concentration of silicon oxide from the core to the cladding.
摘要翻译： 公开了偏磷酸铝光纤。 在具体实施方案中，发现掺杂有10至30摩尔％的三氧化二硼的偏磷酸铝产生结合了高数值孔径和低材料分散体的期望性质的光纤。 纤维是不吸湿的并且具有高熔融温度。 通过掺杂二氧化硅可以降低玻璃的折射率。 因此，可以通过增加氧化硅从芯到包层的浓度来制成渐变光纤。
-
公开(公告)号：US4331462A
公开(公告)日：1982-05-25
申请号：US143834
申请日：1980-04-25
IPC分类号： C03B37/018 , C23C16/517 , G02B6/00 , C03B37/07
CPC分类号： C23C16/517 , C03B37/0183 , Y02P40/57
摘要： Optical fiber preforms are produced by means of a duplex hot zone, a section of which is defined by an r.f. generated plasma fire ball. The process operates within a tube with gaseous precursor material reacting within the hot zone to result in deposited material of the desired preform glass composition. A "smoothing" region within the hot zone is defined by tube surface at a temperature sufficiently elevated to consolidate any particulate material resulting from reaction. In some aspects, the disclosed procedures may be regarded as Modified Chemical Vapor Deposition. Commercial significance resides in significantly increased throughput of preforms and, consequently, in fiber.
摘要翻译： 光纤预制棒是通过双面热区制造的，其一部分由r.f. 产生等离子体火球。 该过程在管内操作，气体前体材料在热区内反应，导致所需预制玻璃组合物的沉积材料。 在热区内的“平滑”区域由管表面在足够升高的温度下限定，以固化由反应产生的任何颗粒物质。 在一些方面，所公开的方法可以被认为是改进的化学气相沉积。 商业意义在于预制件的产量显着增加，因此在纤维中。
-
公开(公告)号：US4302074A
公开(公告)日：1981-11-24
申请号：US26410
申请日：1979-04-02
CPC分类号： C03C13/046 , C03C13/048 , Y10S501/90
摘要： Aluminum metaphosphate optical fibers are disclosed. In a specific embodiment, aluminum metaphosphate, doped with from 10 to 30 mole percent of diboron trioxide, is found to yield an optical fiber which combines the desirable properties of both high numerical aperture and low material dispersion. The fiber is nonhygroscopic and has a high melting temperature. The index of refraction of the glass may be lowered by doping with silicon dioxide. Consequently, a graded fiber may be made by increasing the concentration of silicon oxide from the core to the cladding.
摘要翻译： 公开了偏磷酸铝光纤。 在具体实施方案中，发现掺杂有10至30摩尔％的三氧化二硼的偏磷酸铝产生结合了高数值孔径和低材料分散体的期望性质的光纤。 纤维是不吸湿的并且具有高熔融温度。 通过掺杂二氧化硅可以降低玻璃的折射率。 因此，可以通过增加氧化硅从芯到包层的浓度来制成渐变光纤。
-
公开(公告)号：US4175060A
公开(公告)日：1979-11-20
申请号：US854813
申请日：1977-11-25
CPC分类号： H01C7/025
摘要： A ceramic composition and processing procedure is described which is useful in electric and electronic devices such as thermistors. The ceramic composition, which may be described as a semiconducting barium titanate, exhibits a large positive temperature coefficient of resistance. Advantages are ease and convenience of fabrication with lower sintering temperature than conventional processing and use of an air atmosphere instead of nitrogen or oxygen atmospheres. This facilitates batch processing and permits convenient sintering in a continuous kiln.
摘要翻译： 描述了一种在诸如热敏电阻之类的电气和电子设备中有用的陶瓷组合物和加工方法。 可以描述为半导体钛酸钡的陶瓷组合物表现出大的正温度系数电阻。 优点是比常规处理和使用空气气氛而不是氮气或氧气氛更低的烧结温度来制造的便利性和便利性。 这有利于批量处理，并允许在连续窑中方便地烧结。
-
8.发明授权Method for making optical fiber preforms by collapsing a hollow glass tube upon a glass rod 失效通过将中空玻璃管折叠在玻璃棒上来制造光纤预制件的方法
公开(公告)号：US5578106A
公开(公告)日：1996-11-26
申请号：US516111
申请日：1995-08-17
IPC分类号： G02B6/00 , C03B23/207 , C03B37/012
CPC分类号： C03B37/01248 , C03B23/207 , C03B37/01211
摘要： In accordance with the invention, a plurality of elongated refractory bodies are laminated together by placing the bodies in close adjacency, exposing the adjacent bodies to a plasma torch heat source, and moving the bodies longitudinal past the torch at a nonzero average rate which includes a reciprocating (e.g., oscillatory) component to longitudinally spread the zone of heating. Where the bodies are a rod to be laminated within a hollow tube, it is advantageous to reduce the air pressure between the rod and tube, thereby eliminating potential contaminants and, at the same time, biasing the tube to collapse against the rod. This method is particularly useful in laminating overcladding tubes to core rods to form optical fiber preforms.
摘要翻译： 根据本发明，通过将物体紧密相邻地将多个细长的耐火体层压在一起，将相邻的物体暴露于等离子体焰炬热源，并以非零的平均速率纵向移动通过火炬的主体，该平均速率包括 往复式（例如振荡）部件以纵向扩展加热区域。 在主体是要在中空管内层压的杆的情况下，有利的是减小杆和管之间的空气压力，从而消除潜在的污染物，并且同时使管偏压而抵靠杆。 该方法特别可用于将包层管层压到芯棒上以形成光纤预制件。
-
9.发明授权Process of manufacturing a vitreous silica product including hydrothermally drying a collordal sol-gel 失效制造玻璃状二氧化硅产品的方法，包括水热干燥粘合溶胶 - 凝胶
公开(公告)号：US5565014A
公开(公告)日：1996-10-15
申请号：US221204
申请日：1994-03-31
IPC分类号： C03B19/12 , C03B37/016
CPC分类号： C03B19/12 , C03B37/016
摘要： Sol-gel processing of a silica glass body is facilitated by rapid drying. The body, having been heated to a temperature of about 200.degree. C. in a hermetically sealed vessel, is vented while reducing temperature. Termination of drying coincides with reduction to atmospheric pressure.
摘要翻译： 通过快速干燥促进石英玻璃体的溶胶 - 凝胶加工。 在密封容器中加热到约200℃的温度的本体在降低温度的同时被排出。 干燥终止与降至大气压力一致。
-
公开(公告)号：US5364427A
公开(公告)日：1994-11-15
申请号：US93226
申请日：1993-07-16
IPC分类号： C03B23/047 , C03B37/012 , C03B37/016
CPC分类号： C03B37/0124 , C03B23/047 , C03B37/016 , Y02P40/57 , Y10S65/901
摘要： Bent sol-gel produced tubing is straightened by drawing, with tensile force and operating temperature to result in minimal plastic flow, so that size reduction is small. The method is usefully applied to reject recovery in the preparation of overclad tubes, which as encompassing closely-fitting core rods, form the composite preform from which optical fiber is drawn.
摘要翻译： 弯曲溶胶凝胶生产的管道通过拉伸拉直，拉伸力和操作温度导致最小的塑性流动，从而减小尺寸。 该方法有效地用于排除外包层管的制备中的回收，其包围紧密配合的芯棒形成从其拉制光纤的复合预制件。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.016 秒)
