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公开(公告)号：US4943425A
公开(公告)日：1990-07-24
申请号：US176583
申请日：1988-04-01
申请人： Sophia R. Su , Leo F. Fitzpatrick
发明人： Sophia R. Su , Leo F. Fitzpatrick
CPC分类号： C01B33/163 , C01B33/18 , C03C1/00 , C01P2002/02 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/60 , C01P2006/80
摘要： A method of making high purity, dense silica of large particles size is described. Tetraethylorthosilicate is mixed with ethanol and is added to a dilute acid solution having a pH of about 2.25. The resulting solution is digested for about 5 hours, then 2N ammonium hydroxide is added to form a gel at a pH of 8.5. The gel is screened through an 18-20 mesh screen, vacuum baked, calcined in an oxygen atmosphere and finally heated to about 1200.degree. C. in air to form a large particle size, high purity, dense silica.
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公开(公告)号：US4940571A
公开(公告)日：1990-07-10
申请号：US176582
申请日：1988-04-01
CPC分类号： C01B33/18 , C01B33/163 , C03C1/00 , C01P2002/02 , C01P2004/51 , C01P2006/10 , C01P2006/11 , C01P2006/12 , C01P2006/80 , C01P2006/82
摘要： A method of making large particle size, high purity, dense silica is described. Tetraethylorthosilicate ethanol solution is added to a 2N ammonium hydroxide solution containing silicic acid having an average particle size of about 15 micrometers to form a precipitate followed by a digestion of the precipitate in the solution. The precipitate is filtered through a screen having 45 micrometer openings and dried to form a dried powder. The dried powder is then calcined in an oxygen atmosphere followed by densifying it by heating at a temperature of about 1200.degree. C. in air to form a large particle size, high purity, dense silica.
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3.发明授权Process for molding optical components of silicate glass to a near net shape optical precision 失效将硅酸盐玻璃的光学部件成型为近净光学精度的工艺
公开(公告)号：US4776867A
公开(公告)日：1988-10-11
申请号：US44673
申请日：1987-05-01
CPC分类号： C03B19/12 , C01B33/1585 , C03B19/02 , C03C1/006 , C08L83/02 , Y10S65/901
摘要： A silicate optical glass article is made by forming a gel from a hydrolyzed silicon alkoxide. The resulting gel is molded, cured, dried, solvents removed, heated to form a dense glass having near net shape dimensions thereby reducing expensive polishing steps to obtain the desired final dimensions and surface quality.
摘要翻译： 通过从水解的硅醇盐形成凝胶来制造硅酸盐光学玻璃制品。 所得凝胶被模塑，固化，干燥，除去溶剂，加热形成具有接近净形状尺寸的致密玻璃，从而减少昂贵的抛光步骤以获得期望的最终尺寸和表面质量。
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公开(公告)号：US4834928A
公开(公告)日：1989-05-30
申请号：US73291
申请日：1987-06-29
申请人： Sophia R. Su
发明人： Sophia R. Su
IPC分类号： C04B35/584
CPC分类号： C04B35/584
摘要： A process for making a homogeneous yttria-alumina doped silicon nitride article is described. A uniform coating of yttria and alumina is applied to the surface of silicon nitride particles by a chemical application of the nitrates of yttrium and aluminum followed by drying and a subsequent conversion of the nitrates to the corresponding oxides. The resulting powder is formed into an article and pressureless sintered to a density greater than 98% of theoretical at temperatures less than 1700.degree. C.
摘要翻译： 描述了制造均匀的氧化钇 - 氧化铝掺杂的氮化硅制品的方法。 通过化学施加钇和铝的硝酸盐然后干燥和随后将硝酸盐转化成相应的氧化物，将均匀的氧化钇和氧化铝涂层施加到氮化硅颗粒的表面。 将所得粉末形成为在低于1700℃的温度下在大于理论值的98％的密度下烧结的制品并进行无压烧结
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公开(公告)号：US4814128A
公开(公告)日：1989-03-21
申请号：US41884
申请日：1987-04-23
IPC分类号： C04B35/584 , C04B35/628 , C04B41/50 , C04B41/87 , C04B35/58
CPC分类号： C04B35/62807 , C04B35/584 , C04B35/62655 , C04B35/62813 , C04B41/5031 , C04B41/87 , C04B2235/443 , C04B2235/604 , C04B2235/608 , C04B2235/656 , C04B2235/6562 , C04B2235/658 , C04B2235/77
摘要： A process for making a homogeneous yttria-alumina doped silicon nitride article is described. A uniform coating of yttria and alumina is applied to the surface of silicon nitride particles by a chemical application of the hydroxides of yttrium and aluminum followed by drying and a subsequent conversion of the hydroxides to the corresponding oxides. The resulting powder is formed into an article and pressureless sintered to a density greater than 99% of theoretical.
摘要翻译： 描述了制造均匀的氧化钇 - 氧化铝掺杂的氮化硅制品的方法。 通过化学施加钇和铝的氢氧化物，然后干燥和随后将氢氧化物转化成相应的氧化物，将氧化钇和氧化铝均匀地涂覆到氮化硅颗粒的表面上。 将所得粉末制成制品，并将其无压烧结至密度大于理论值的99％。
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公开(公告)号：US4287159A
公开(公告)日：1981-09-01
申请号：US186948
申请日：1980-09-15
申请人： Samuel Natansohn , Sophia R. Su
发明人： Samuel Natansohn , Sophia R. Su
CPC分类号： C22B3/0024 , C01G41/003 , C22B3/0009 , C22B3/0016 , C22B3/0031 , C22B3/42 , Y02P10/234 , Y10S423/14
摘要： A process for recovering tungsten from low level sources such as naturally occurring brines in a form substantially free of contaminating boron comprises adjusting the pH of the source solution to a value below about pH 8, contacting the pH-adjusted solution with an ion exchange resin, preferentially eluting the tungsten values in an aqueous eluate, extracting the eluate solution with an organic extractant comprising o-mercaptobenzoic acid, a quaternary alkylammonium salt and an inert organic solvent, and stripping the tungsten-loaded organic extractant solution with an aqueous basic stripping solution.
摘要翻译： 从低水平源（例如基本上不含污染硼的形式的天然存在的盐水）中回收钨的方法包括将源溶液的pH调节至低于约pH 8的值，使pH调节的溶液与离子交换树脂接触， 优先在水性洗脱液中洗脱钨值，用包含邻 - 巯基苯甲酸，季烷基铵盐和惰性有机溶剂的有机萃取剂萃取洗脱液，并用碱性汽提溶液洗脱负载钨的有机萃取剂溶液。
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公开(公告)号：US5288679A
公开(公告)日：1994-02-22
申请号：US797874
申请日：1991-11-26
申请人： Sophia R. Su
发明人： Sophia R. Su
CPC分类号： H01L39/2419 , H01L39/248 , Y10S505/74 , Y10S505/742 , Y10S505/782
摘要： A superconducting copper oxide based wire exhibiting improved critical current density and method. A superconductor powder and a binder melt are mixed at a solids loading of at least 90% by weight. The binder is an ester wax with no more than about 0.25 weight percent extrusion-aiding additives. The ester wax has the general formula RCOOR' with R and R' being hydrocarbon chains of at least 6 carbons. The ester wax melting point is 40.degree.-100.degree. C.; its melt viscosity is 94-2000 centipoise. The mixture is shaped and heated in an oxidizing atmosphere at up to 120.degree. C./hr to 500.degree.-600.degree. C., and held at that temperature for a time sufficient to remove the binder and achieve a wire density of at least 50% of theoretical. The green wire is heated at 50.degree.-130.degree. C./hr to at least 920.degree. C., and held at 920.degree.-990.degree. C. to achieve 90% of theoretical density, then annealed in oxygen. The wire may be textured during the heating process or by seeding. About 3-12 w/o silver may be included in a superconducting rare earth barium copper oxide based wire. The superconducting copper oxide based wire exhibits a density of at least about 99% of theoretical density, a critical temperature at dc zero resistance of at least about 90 K, and a critical current density of at least about 1000 A/cm.sup.2.
摘要翻译： 一种显示出改进的临界电流密度和方法的超导铜氧化物基线。 将超导体粉末和粘合剂熔体以至少90重量％的固体负载混合。 粘合剂是不超过约0.25重量％挤出助剂的酯蜡。 酯蜡具有通式RCOOR'，其中R和R'为至少6个碳原子的烃链。 酯蜡的熔点为40〜100℃。 其熔体粘度为94-2000厘泊。 将混合物在高达120摄氏度/小时至500摄氏度至600摄氏度的氧化气氛中成型和加热，并在该温度下保持足以移除粘合剂的时间，并实现至少50 理论的百分比。 绿线在50度-130摄氏度/小时加热至至少920摄氏度，并保持在920度-990摄氏度以达到理论密度的90％，然后在氧气中退火。 导线可以在加热过程中或通过播种进行纹理化。 在超导稀土钡铜氧化物基线中可以包含大约3-12w / o的银。 超导氧化铜基线材的密度至少为理论密度的约99％，直流零电阻的临界温度为至少约90K，临界电流密度为至少约1000A / cm 2。
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公开(公告)号：US5167887A
公开(公告)日：1992-12-01
申请号：US823006
申请日：1992-01-15
申请人： Sophia R. Su
发明人： Sophia R. Su
IPC分类号： C04B35/589 , C04B35/593
CPC分类号： C04B35/589 , C04B35/5935
摘要： A method of making fully dense, crack-free silicon nitride articles using polysilanes as a binder. Polysilane is dissolved in a solvent and a silicon nitride composition including a densification aid is added to form a homogeneous mixture. The mixture is dried to form a powder, and molded at a temperature less than 100.degree. C. to form a molded article. Alternatively, the slurry is poured into a mold and vacuum filtered to form a cake, then isostatically pressed at a temperature of approximately 90.degree. C. The molded article or pressed cake is heated at a rate of approximately 5.degree. C./min to about 900.degree. C. in a nonoxidizing atmosphere and held at about 900.degree. C. for a time sufficient to decompose the polysilane. The article is sintered in a nonoxidizing atmosphere at a temperature of about 1685.degree.-1900.degree. C. to form a silicon nitride article free of cracks and having a density greater than 3.5 g/cc.
摘要翻译： 使用聚硅烷作为粘合剂制造完全致密，无裂纹的氮化硅制品的方法。 将聚硅烷溶解在溶剂中，并加入包含致密化助剂的氮化硅组合物以形成均匀的混合物。 将混合物干燥以形成粉末，并在低于100℃的温度下成型以形成模制品。 或者，将浆料倒入模具中并真空过滤以形成滤饼，然后在约90℃的温度下等静压。将模制品或压饼以约5℃/分钟的速率加热至约 在不氧化气氛中保持900℃，并在约900℃保持足以分解聚硅烷的时间。 将该制品在约1685-1900℃的非氧化气氛中烧结，形成无裂缝且密度大于3.5g / cc的氮化硅制品。
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9.发明授权
公开(公告)号：US4680049A
公开(公告)日：1987-07-14
申请号：US896780
申请日：1986-08-15
IPC分类号： C01B33/158 , C03B19/12 , C03C1/00 , C08L83/02 , C08B19/06
CPC分类号： C08L83/02 , C01B33/1585 , C03B19/12 , C03C1/006 , C03C2203/26 , Y10S65/901
摘要： A silicate optical glass article is made by forming a gel from a hydrolyzed silicon alkoxide. The resulting gel is molded, cured, dried, solvents removed, heated to form a dense glass having near net shape dimensions thereby reducing expensive polishing steps to obtain the desired final dimensions and surface quality.
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公开(公告)号：US4608192A
公开(公告)日：1986-08-26
申请号：US570900
申请日：1984-01-16
申请人： Sophia R. Su
发明人： Sophia R. Su
CPC分类号： H01B1/04 , C01B31/0415
摘要： A stabilized graphite intercalation product can be formed by sequential intercalation of graphite. Graphite is initially intercalated with an alkali metal (M). The unstable alkali metal intercalation compound is then intercalated with an organic acid (R) to form a room temperature stable, graphite intercalation containing a metal charge transfer salt of the type M.sup.+ R.sup.-.
摘要翻译： 稳定的石墨插层产物可以通过石墨的顺序嵌入形成。 石墨最初插入碱金属（M）。 然后将不稳定的碱金属插入化合物插入有机酸（R）以形成含有M + R-型金属电荷转移盐的室温稳定的石墨插层。
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