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公开(公告)号：US4828595A
公开(公告)日：1989-05-09
申请号：US126103
申请日：1987-10-27
Applicant: Hiroshi Morishita , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
Inventor： Hiroshi Morishita , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
CPC classification number: C03C3/06 , C03B20/00 , C03C2201/02 , C03C2203/10 , Y02P40/57 , Y10S65/08
Abstract: The present invention relates to a process for production of a glass by the vacuum melting method using silica as raw material and comprises uniformly preheating a silica powder containing an accelerator for phase conversion to about 800.degree. C.; filling the preheated silica powder in a container while substantially maintaining the temperature; further heating the silica powder to convert it into a sintered body having a cristobalite phase; and then heating and melting the sintered body in vacuum for glass formation, whereby not only are improvments in raw material efficiency and productivity by shortening of the heating time achieved, but also the formation of cracks on the surface of the resulted sintered body which has been one of the important reasons for resulting in products of sub-standard can be substantially completely avoided.
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公开(公告)号：US4828594A
公开(公告)日：1989-05-09
申请号：US126104
申请日：1987-10-27
Applicant: Hiroshi Morishita , Hiroshi Namikawa , Youji Koguchi , Shin-Ichi Miyake , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
Inventor： Hiroshi Morishita , Hiroshi Namikawa , Youji Koguchi , Shin-Ichi Miyake , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
CPC classification number: C03B20/00 , C03C3/06 , C03C2201/02 , C03C2203/10 , Y10S65/08
Abstract: The present invention relates to a process for the production of a glass from silica as a raw material by a vacuum melting method, in which a high quality glass is produced efficiently by compounding a silica powder containing an excess amount of the accelerator for phase conversion and silica powders containing substantially no such accelerator or by introducing silica powders in a solution containing an accelerator for phase conversion, adding an acid or basic component to the mixture to adjust the pH thereof, stirring the mixture for mixing, and subjecting the mixture to dehydration and drying to obtain silica powders containing the accelerator for phase conversion in proper quantities, filling the resultant silica powders in a vessel and heating the powder to form a sintered molded body having cristobalite phase having a self-supporting property and also having a proper matrix strength and a high porosity, and then heating the sintered body under vacuum.
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公开(公告)号：US4828593A
公开(公告)日：1989-05-09
申请号：US126102
申请日：1987-10-27
Applicant: Hiroshi Morishita , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
Inventor： Hiroshi Morishita , Terukazu Imayoshi , Hitoshi Kikuchi , Akihiro Nakamura
CPC classification number: C03C3/06 , C03B20/00 , C03C2201/02 , C03C2203/10 , Y10S65/08
Abstract: A process for production of a glass by a vacuum melting method using silica as raw materials comprising heating silica powders in the presence of an accelerator for phase conversion to convert them into a sintered body having cristobalite phase; molding or repowdering the sintered body; containing or filling the resulted sintered body in a container having a desired shape; and then heating and melting it in vacuo for glass formation, or accumulating a plurality of the sintered bodies into a desired shape; and then heating and melting it for glass formation, whereby a high-quality glass ingot having a desired shape or a larger glass ingot can be readily obtained without reduction in productivity.
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154.发明授权Preparation of monolithic silica aerogels, the aerogels thus obtained and their use for the preparation of silica glass articles and of heat-insulating materials 失效制备整体二氧化硅气凝胶，由此获得的气凝胶及其制备石英玻璃制品和隔热材料的用途
公开(公告)号：US4432956A
公开(公告)日：1984-02-21
申请号：US384072
申请日：1982-06-01
Applicant: Jerzy W. Zarzycki , Michel Prassas , Jean E. H. Phalippou
Inventor： Jerzy W. Zarzycki , Michel Prassas , Jean E. H. Phalippou
IPC: B01J13/00 , C01B33/158 , C03B8/02 , C03B19/12 , C03C1/00 , C03C3/06 , C04B28/24 , C01B33/16 , C01B33/12
CPC classification number: B01J13/0091 , B01J13/0052 , C01B33/1585 , C03B19/12 , C03C1/006 , C03C3/06 , C04B28/24 , C03C2201/02 , C03C2203/26 , Y10S65/901
Abstract: The invention relates to a process for the preparation of monolithic silica aerogels by drying silica gels under hypercritical conditions, which is characterized by the absence of washing of the silica gel, a high heating rate in the autoclave and purging of the autoclave after substantial removal of the solvent. Other preferred conditions are the use of an amount of water not exceeding 1.5 times the stoichiometric amount for the hydrolysis, hypercritical conditions corresponding to a temperature of 265.degree.-275.degree. C. and to a pressure of 150-200 bars, and so on. Use of the aerogels for the preparation of silica glass bodies or articles and of heat-insulating materials.
Abstract translation: 本发明涉及一种通过在超临界条件下干燥二氧化硅凝胶来制备整体二氧化硅气凝胶的方法，其特征在于不经硅胶洗涤，高压釜中的高加热速率和高压灭菌器的基本除去后的清洗 溶剂。 其他优选的条件是使用不超过相应于265℃-275℃的温度和150-200巴的压力的水解，超临界条件的化学计量量的1.5倍的水量，等等。 使用气凝胶制备石英玻璃体或制品以及绝热材料。
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公开(公告)号：US4126422A
公开(公告)日：1978-11-21
申请号：US680452
申请日：1976-04-26
Applicant: Lewis H. Brandes
Inventor： Lewis H. Brandes
CPC classification number: C04B33/00 , C03C1/026 , C03C3/06 , C04B35/14 , C04B35/626 , C03C2201/02 , C03C2203/20 , C03C2203/40 , Y10S65/901
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。
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Patent Agency Ranking
公开(公告)号：US4098595A
公开(公告)日：1978-07-04
申请号：US752715
申请日：1976-12-20
Applicant: Arnold Lenz , Gerhard Kreuzburg , Rainer Haase
Inventor： Arnold Lenz , Gerhard Kreuzburg , Rainer Haase
CPC classification number: C03B19/1065 , C03B19/06 , C03B19/066 , C03B20/00 , C03C3/06 , C03C2201/02 , C03C2203/26 , Y10S65/06 , Y10S65/08 , Y10S65/901
Abstract: Method of preparing granular quartz glass which comprises heating a porous granulated silica gel having an alkoxy group content equal to or less than 1 weight percent and a total impurity content of less than 1 part per million, the porous granulated silica gel obtained by hydrolysis of an orthosilicic acid ester of an aliphatic alcohol at a temperature up to 1400.degree. C.
Abstract translation: 制备颗粒状石英玻璃的方法，其包括加热烷氧基含量等于或小于1重量％，总杂质含量低于百万分之1的多孔制粒硅胶，通过水解 在高达1400℃的温度下脂肪醇的正硅酸酯
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公开(公告)号：US4059658A
公开(公告)日：1977-11-22
申请号：US613202
申请日：1975-09-15
Applicant: Robert D. Shoup , William J. Wein
Inventor： Robert D. Shoup , William J. Wein
CPC classification number: C03C3/06 , C03B19/12 , C04B35/14 , C03C2201/02 , C03C2203/24 , C03C2203/30 , C03C2203/34 , Y10S65/901
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。
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公开(公告)号：US3933454A
公开(公告)日：1976-01-20
申请号：US462962
申请日：1974-04-22
Applicant: Robert D. DeLuca
Inventor： Robert D. DeLuca
IPC: C03B37/018 , C03B8/04 , C03B20/00 , C03B37/014 , C03C3/06 , G02B3/00 , G02B5/04 , G02B6/00 , C03C25/02 , C03C17/22 , C03C21/00
CPC classification number: C03C3/06 , C03B37/01446 , C03C2201/02 , C03C2203/44 , C03C2203/50 , Y10S65/90
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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公开(公告)号：US3741796A
公开(公告)日：1973-06-26
申请号：US3741796D
申请日：1971-03-05
Applicant: TEXAS INSTRUMENTS INC
Inventor： WALKER J
CPC classification number: C04B41/5025 , C01B33/113 , C03B19/1423 , C03B19/1446 , C03B19/1492 , C03B2207/06 , C03B2207/12 , C03B2207/20 , C03B2207/42 , C03B2207/50 , C03B2207/64 , C03B2207/87 , C03C3/06 , C03C2201/02 , C03C2203/44 , C04B35/14 , C04B41/4505 , Y10S65/08
Abstract: A PLURALITY OF TORCH FLAMES EACH RESULTING FROM THE COMBUSTION OF GASEOUS SILICON TETRACHLORIDE AND A MIXTURE OF HYDROGEN AND OXYGEN ARE DIRECTED UPON A GRAPHITE MANDREL IN ORDER TO FORM A HIGH PURITY SILICIA ARTICLE UPON THE MANDREL. STRUCTURE MAY BE PROVIDED TO PREVENT THE BUILDUP OF DEPOSITS UPON THE NOZZLES OF THE TORCHES TO PREVENT OBSTRUCTION OF THE NOZZLE OPENINGS. ADDITIONAL GLAZING TORCHES MAY BE UTILIZED TO TREAT THE SILICA ARTICLES AS THEY ARE FORMED UPON THE MANDREL.
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公开(公告)号：US3275408A
公开(公告)日：1966-09-27
申请号：US33584864
申请日：1964-01-06
Applicant: THERMAL SYNDICATE LTD
Inventor： ALEXANDER WINTERBURN JOHN
IPC: C03B37/018 , C01B33/12 , C01B33/18 , C03B8/04 , C03B19/14 , C03B37/014 , C03C3/06 , C03C17/02 , G02B6/00
CPC classification number: C03C3/06 , C01B33/183 , C01P2004/84 , C03B19/1423 , C03B37/01426 , C03C17/02 , C03C2201/02 , C03C2203/44
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