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公开(公告)号：US5665133A
公开(公告)日：1997-09-09
申请号：US541467
申请日：1995-10-10
CPC分类号： C03C3/06 , C03B19/06 , C03B19/066 , C03B20/00 , C03B32/02 , C03B2201/03 , C03B2201/04 , C03C2201/23 , C03C2203/10
摘要： Pure transparent quartz glass is provided by molding powdery amorphous silica into an article, converting the molded powdery amorphous silica into crystalline silica of high-temperature type cristobalite structure, and then fusing the crystalline silica, the quartz glass containing impurities respectively at a content of not higher than 1 ppm, and an OH group at a content of not higher than 20 ppm, and having a viscosity of 10.sup.12.0 poise or more at 1200.degree. C. The quartz glass is transparent and has high purity, and is excellent in high temperature viscosity characteristics. The quartz glass can be produced at a low cost.
摘要翻译： 通过将粉状无定形二氧化硅模制成制品，将成型的粉末状无定形二氧化硅转化为高温型方英石结构的结晶二氧化硅，然后将结晶二氧化硅，含有杂质的石英玻璃分别以不含量的含量 高于1ppm，OH基为20ppm以下，1200℃时粘度为1012.0泊以上。石英玻璃透明，纯度高，耐高温粘度优异 特点 石英玻璃可以低成本生产。
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公开(公告)号：US4683128A
公开(公告)日：1987-07-28
申请号：US878773
申请日：1986-06-25
申请人： Koichi Orii , Masashi Nishida , Junsuke Yagi , Iwao Ohshima
发明人： Koichi Orii , Masashi Nishida , Junsuke Yagi , Iwao Ohshima
IPC分类号： C01B33/152 , C01B33/18 , C03B37/01 , C03B37/095 , C03C13/00 , C01B33/12
CPC分类号： C03C13/005 , C01B33/152 , C01B33/181 , C03B37/011 , C03B37/095 , C01P2004/10 , C01P2004/50 , C01P2006/80
摘要： This invention deals with a process for manufacturing high purity silica which comprises making an aqueous alkali silicate solution into fine fibrous gel in a coagulant, treating the fibrous gel obtained with an acid-containing solution, and then with water to extract and remove impurities; and optionallly heating a resulting silica at a temperature of 1,000.degree. C. or higher. Thus obtained silica is preferably used as a filler, especially, the one for resin compositions for encapsulating electronic parts; etc.
摘要翻译： 本发明涉及一种制备高纯度二氧化硅的方法，包括将碱性硅酸镁水溶液制成凝结剂中的细纤维凝胶，处理用含酸溶液得到的纤维凝胶，然后用水萃取和除去杂质; 并且可以在1000℃或更高的温度下加热所得到的二氧化硅。 优选使用这样得到的二氧化硅作为填充剂，特别是用于密封电子部件的树脂组合物， 等等
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公开(公告)号：US5154905A
公开(公告)日：1992-10-13
申请号：US814051
申请日：1991-12-26
CPC分类号： C04B14/06 , C01B33/12 , C03B19/1095
摘要： A method for producing a nonsintered cristobalite particles comprising heating amorphous silica particles at a temperature of 1400.degree. to 1700.degree. C. in the presence of cristobalite particles (hereinafter referred to as cristobalite particles for addition and mixing) of at least 5 parts by weight based on 100 parts by weight of said amorphous silica particles to convert said amorphous silica particles to cristobalite particles with their particle form kept unchanged. According to the present invention, dense cristobalite having a low alkali content can be obtained in the form of particles. Such cristobalite is used as a filler, a dispersing agent, etc., and also as a material for high-quality artificial quartz, ceramics, etc., and particularly as a material for transparent quartz glass because of its generating no bubbles at the time of melt-molding.
摘要翻译： 一种非烧结方英石颗粒的制造方法，其包括在方沸石颗粒（以下称为方石英颗粒添加和混合）存在下，在1400〜1700℃的温度下加热至少5重量份的无定形二氧化硅颗粒， 在100重量份的所述无定形二氧化硅颗粒上将所述无定形二氧化硅颗粒转化为方英石颗粒，其颗粒形式保持不变。 根据本发明，可以以颗粒的形式获得具有低碱含量的致密方英石。 这种方英石作为填料，分散剂等，也可以作为高品质的人造石英，陶瓷等的材料，特别是作为透明石英玻璃的材料，因为在此时不产生气泡 的熔融成型。
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公开(公告)号：US5028360A
公开(公告)日：1991-07-02
申请号：US508813
申请日：1990-04-16
IPC分类号： C01B33/12 , C01B33/18 , C01B33/187
CPC分类号： C01B33/12 , C01B33/18 , C01B33/187 , C01P2002/02 , C01P2004/03 , C01P2004/10 , C01P2004/32 , C01P2004/34 , C01P2004/61 , C01P2006/10 , C01P2006/12 , C01P2006/80
摘要： A method of manufacturing spherical silica particles comprising the steps of processing in an acid-containing solution and then washing with water the coagulant derived from an aqueous alkali metal silicate solution extruded through pores in a water-miscible organic medium or acid solution, wet-grinding the amorphous silica thus obtained in a liquid dispersion medium to obtain a fine particle silica suspension with a weight average particle size of 10 .mu.m or less, spray-drying this fine particle silica suspension with hot air and sintering the spherical granulated silica thus obtained. According to the present invention, the high-purity spherical silica particles can be obtained with high solidity and adjusted surface smoothness without any complicated operation or waste water treatment for use as a sealant filler for highly-integrated IC electronic parts.
摘要翻译： 一种制造球形二氧化硅颗粒的方法，包括以下步骤：在含酸溶液中加工，然后用水洗涤衍生自水溶性有机介质或酸溶液中的孔的水性碱金属硅酸盐溶液的凝结剂，湿磨 在液体分散介质中获得的无定形二氧化硅，得到重均粒径为10μm以下的微粒二氧化硅悬浮液，用热风喷雾干燥该微粒二氧化硅悬浮液，烧结得到的球状粒状二氧化硅。 根据本发明，高纯度球形二氧化硅颗粒可以获得高固体度和调节表面平滑度，而无需任何复杂的操作或废水处理，用作高度集成的IC电子部件的密封剂填料。
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公开(公告)号：US5202104A
公开(公告)日：1993-04-13
申请号：US481235
申请日：1990-02-20
申请人： Naotake Watanabe , Koichi Orii , Junsuke Yagi , Iwao Ohshima
发明人： Naotake Watanabe , Koichi Orii , Junsuke Yagi , Iwao Ohshima
CPC分类号： C03C12/00 , C01B33/126 , C01B33/16
摘要： A process for preparing silica having a low silanol content which comprises heating amorphous silica in an atmosphere of a low partial pressure of water vapor to maintain the amorphous silica at a temperature in a range of from 600.degree. to 1000.degree. C. at a first heating step and then maintain at a temperature of 1200.degree. C. or more at a second heating step. The silica having a low silanol content obtained according to the present invention is advantageously used as a raw material for quartz glass, particularly as a raw material for preparing crucibles used to pull up silicon single crystals.
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公开(公告)号：US4853198A
公开(公告)日：1989-08-01
申请号：US169548
申请日：1988-03-17
申请人： Koichi Orii , Iwao Ohshima , Naotake Watanabe
发明人： Koichi Orii , Iwao Ohshima , Naotake Watanabe
摘要： There is disclosed a process for producing unsintered cristobalite silica by heating an amorphous silica in the presence of an alkali component, which comprises heating an amorphous silica having a specific surface area (measured according to BET method) of 50 m.sup.2 /g or more at a temperature in the range of 1000.degree. to 1300.degree. C., in the presence of an alkali metal element in a concentration of 5 to 600 ppm to said silica to change it partially or completely into cristobalite and then heating at a temperature of exceeding 1300.degree. C. to eliminate alkali.
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