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    Process for producing a high-temperature superconductor and also shaped bodies composed thereof
    42.
    发明授权
    Process for producing a high-temperature superconductor and also shaped bodies composed thereof 失效
    制造高温超导体的方法以及由其构成的成型体

    公开(公告)号：US5409888A

    公开(公告)日：1995-04-25

    申请号：US179879

    申请日：1994-01-11

    申请人： Joachim Bock ,  Eberhard Preisler

    发明人： Joachim Bock ,  Eberhard Preisler

    IPC分类号： C04B35/00 ,  C01G1/00 ,  C04B35/45 ,  C04B35/653 ,  H01B12/00 ,  H01L39/24 ,  C01G29/00

    CPC分类号： H01L39/2419 ,  C04B35/4521 ,  C04B35/653 ,  Y10S505/739 ,  Y10S505/782

    摘要： To produce a high-temperature superconductor of the composition Bi.sub.2 (Sr,Ca).sub.3 Cu.sub.2 O.sub.8+x having a strontium to calcium ratio of 5:1 to 2:1 and a value of x between 0 and 2, the oxides and/or carbonates of bismuth, strontium, calcium and copper are vigorously mixed in a stoichiometric ratio. The mixture is heated at a temperature of 870.degree. to 1100.degree. C. until a homogeneous melt is obtained. The melt is poured into mold and allowed to solidify in them. The cast bodies removed from the molds are annealed for 6 to 30 hours at 780.degree. to 850.degree. C. Finally, the annealed cast bodies are treated for at least 6 hours at temperatures of 600.degree. to 820.degree. C. in an oxygen atmosphere. The cast bodies can be converted into shaped bodies of the desired sizes by mechanical processes before they are annealed. The shape and size of the shaped bodies may also be determined by the shape and dimensioning of the mold used in producing the cast bodies.

    摘要翻译： 为了制备锶与钙的比例为5:1-2:1的组成Bi2（Sr，Ca）3Cu2O8 + x的高温超导体，x值在0和2之间，氧化物和/或碳酸盐 铋，锶，钙和铜以化学计量比剧烈混合。 将混合物在870℃至1100℃的温度下加热直到获得均匀的熔体。 将熔体倒入模具中并使其在其中固化。 从模具中取出的铸体在780〜850℃退火6〜30小时。最后，将退火后的铸体在氧气氛中600〜820℃的温度下处理6小时以上。 在退火之前，铸造体可以通过机械工艺转化成所需尺寸的成型体。 成型体的形状和尺寸也可以通过用于制造铸体的模具的形状和尺寸确定。

    Elongate bismuth system superconductor having aligned 2212 phase
    43.
    发明授权
    Elongate bismuth system superconductor having aligned 2212 phase 失效
    具有对准2212相的细长铋系超导体

    公开(公告)号：US5401717A

    公开(公告)日：1995-03-28

    申请号：US194980

    申请日：1994-02-14

    申请人： Kenneth W. Lay

    发明人： Kenneth W. Lay

    IPC分类号： H01L39/24 ,  H01B12/04

    CPC分类号： H01L39/248 ,  Y10S505/704 ,  Y10S505/742 ,  Y10S505/782 ,  Y10T29/49014

    摘要： This invention is related to the preparation of an elongate conductor having a silver sheath, and a core of an aligned polycrystalline oxide superconductor having the approximate formula Bi.sub.2-x Pb.sub.x Sr.sub.2-a L.sub.a+b Ca.sub.1-b Cu.sub.2 O.sub.y where y is from 7.5 to 8.5, and L is a lanthanide. A powder mixture is formed comprised of a first portion of a superconducting bismuth oxide compound that can be reaction-sintered to form the core oxide superconductor, and a second portion of oxides suitable for reacting with the first portion to form the core oxide superconductor. An elongate body is formed having a silver sheath, and a core of the mixture. The body is deformed to align the first portion, and heated to reaction-sinter the first and second portions to form the core oxide superconductor.

    摘要翻译： 本发明涉及制备具有银鞘的细长导体和具有近似式Bi2-xPbxSr2-aLa + bCa1-bCu2Oy的取向多晶氧化物超导体的芯，其中y为7.5至8.5，L为 镧系元素。 形成由超导氧化铋化合物的第一部分组成的粉末混合物，其可被反应烧结以形成核心氧化物超导体，以及第二部分氧化物，其适于与第一部分反应以形成氧化铁超导体。 形成具有银护套的细长体和混合物的芯。 使主体变形以对齐第一部分，并加热以使第一和第二部分反应烧结以形成氧化铁超导体。

    Process for preparing a thallium-containing superconductor
    44.
    发明授权
    Process for preparing a thallium-containing superconductor 失效
    制备含铊超导体的方法

    公开(公告)号：US5385882A

    公开(公告)日：1995-01-31

    申请号：US966019

    申请日：1992-12-09

    申请人： Shyam S. Bayya ,  Robert L. Synder ,  Sudhakar Gopalakrishman ,  Walter A. Schulze

    发明人： Shyam S. Bayya ,  Robert L. Synder ,  Sudhakar Gopalakrishman ,  Walter A. Schulze

    IPC分类号： C01G3/00 ,  H01B12/00 ,  H01L39/12

    CPC分类号： C01G3/006 ,  C01P2004/20 ,  C01P2004/22 ,  C01P2004/61 ,  Y10S505/729 ,  Y10S505/733 ,  Y10S505/782 ,  Y10S505/783

    摘要： There is disclosed a process for preparing a thallium-containing superconductive composition. In the first step of the process, a mixture of an inorganic salt (such as potassium chloride) and a powder compositon is provided; the powder composition contains at least three separate compounds which, in combination, correspond to the stoichiometry of the super-conductor to be produced. This mixture is then charged to a closed container, raised to a temperature of from 800-959 degrees Centigrade, and heated for from about 1 to about 12 hours; thereafter, it is cooled to a temperature of 600 degrees Centigrade at a rate of at least 300 degrees Celsius per hour.

    摘要翻译： 公开了一种制备含铊的超导组合物的方法。 在该方法的第一步中，提供无机盐（如氯化钾）和粉末组合物的混合物; 粉末组合物含有至少三种分开的化合物，其组合对应于待生产的超导体的化学计量。 然后将该混合物装入密封容器中，升温至800-959摄氏度的温度，并加热约1至约12小时; 然后以至少300摄氏度/小时的速度将其冷却至600摄氏度的温度。

    Molding of sintered strontium/calcium indate and the use thereof
    46.
    发明授权
    Molding of sintered strontium/calcium indate and the use thereof 失效
    烧结锶/钙的成型及其用途

    公开(公告)号：US5346538A

    公开(公告)日：1994-09-13

    申请号：US720494

    申请日：1991-06-27

    申请人： Winfried Becker

    发明人： Winfried Becker

    IPC分类号： C04B35/00 ,  C01G15/00 ,  C04B35/01 ,  C04B35/653 ,  B28B7/34 ,  C04B35/02

    CPC分类号： C01G15/006 ,  C01G15/00 ,  C04B35/01 ,  C04B35/653 ,  Y10S505/782 ,  Y10S505/785

    摘要： Alkaline earth metal indates of the formula (Sr,Ca)In.sub.2 O.sub.4 can be converted by sintering or fusing into compact moldings which, owing to their stability are suitable even at temperatures of at least 800.degree. C. as reaction vessels for chemical reactions in the presence of bismuth (III) oxide and/or alkaline earth metal oxides.

    摘要翻译： PCT No.PCT / EP89 / 01606 Sec。 371日期1991年6月27日 102（e）日期1991年6月27日PCT提交1989年12月23日PCT公布。 出版物WO90 / 07476 1990年7月12日，公式（Sr，Ca）In 2 O 4的碱土金属盐可以通过烧结或熔融转化为紧密的模制品，由于其稳定性甚至在至少800℃的温度下也是合适的，作为反应 在氧化铋（III）和/或碱土金属氧化物存在下进行化学反应的容器。

    Process for producing superconducting wires
    47.
    发明授权
    Process for producing superconducting wires 失效
    生产超导线的工艺

    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

    IPC分类号： H01L39/24 ,  H01L39/12

    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。

    Tin-containing ceramic composition
    49.
    发明授权
    Tin-containing ceramic composition 失效
    含锡陶瓷组合物

    公开(公告)号：US5217946A

    公开(公告)日：1993-06-08

    申请号：US345338

    申请日：1989-05-01

    申请人： Leonard E. Dolhert

    发明人： Leonard E. Dolhert

    IPC分类号： C04B35/00 ,  C01G1/00 ,  C01G30/00 ,  C04B35/45 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12

    CPC分类号： H01L39/126 ,  C04B35/4521 ,  C04B35/4525 ,  Y10S505/782

    摘要： Superconductors having a composition Bi.sub.2-a-b-c Sn.sub.a Pb.sub.b Sb.sub.c Sr.sub.2 Ca.sub.n-1 Cu.sub.n O.sub.2n+4 can be made by firing the appropriate mixtures of designated oxides or carbonates. In the composition a=about 0.001-0.4, b about 0-0.4, c about 0-0.4, and n 2 or 3. The addition of Sn improves the superconductive properties of comparable compositions that lack Sn. For example, Bi.sub.1.6 Sn.sub.0.4 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.x (x=ca 10), calcined at 830.degree. C. for 15 hours shows superconductivity by magnetic susceptibility tests at about 77.degree. K. whereas Bi.sub.2 Sr.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10 prepared under the same conditions but lacking Sn, shows nothing at this temperature.

    摘要翻译： 具有Bi2-a-b-cSnaPbbSbcSr2Can-1CunO2n + 4组成的超导体可以通过烧制合适的指定氧化物或碳酸盐的混合物来制备。 在组合物a =约0.001-0.4，b约0-0.4，c约0-0.4和n 2或3.添加Sn改善了缺乏Sn的可比组合物的超导性能。 例如，在830℃下煅烧15小时的Bi1.6Sn0.4Sr2Ca2Cu3Ox（x = ca 10）通过磁化率测试在约77℃显示出超导性，而在相同条件下制备但不含Sn的Bi2Sr2Ca2Cu3O10在 这个温度。