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    Processing of (Bi,Pb)SCCO superconductor in wires and tapes
    3.
    发明授权
    Processing of (Bi,Pb)SCCO superconductor in wires and tapes 失效
    （Bi，Pb）SCCO超导体在电线和磁带中的处理

    公开(公告)号：US06311386B1

    公开(公告)日：2001-11-06

    申请号：US09358245

    申请日：1999-07-21

    申请人： Qi Li ,  Eric R. Podtburg ,  Patrick John Walsh ,  William L. Carter ,  Gilbert N. Riley, Jr. ,  Martin W. Rupich ,  Elliott Thompson ,  Alexander Otto

    发明人： Qi Li ,  Eric R. Podtburg ,  Patrick John Walsh ,  William L. Carter ,  Gilbert N. Riley, Jr. ,  Martin W. Rupich ,  Elliott Thompson ,  Alexander Otto

    IPC分类号： H01L3929

    CPC分类号： C04B35/4521 ,  C04B35/4525 ,  C04B35/65 ,  H01L39/2419 ,  H01L39/248 ,  Y10S505/739 ,  Y10S505/74 ,  Y10S505/742 ,  Y10T29/49014

    摘要： A novel process of the production and processing of high quality, high Tc (Bi,Pb)SCCO superconductors starts with fabrication of a precursor article including selected intermediate phases with desired chemical and structural properties. The precursor fabrication includes introducing the reacted mixture having a dominant amount of the tetragonal BSCCO phase into a metal sheath, and sealing the reacted mixture within said sheath, heating the mixture at a second selected processing temperature in an inert atmosphere with a second selected oxygen partial pressure for a second selected time period, the second processing temperature and the second oxygen partial pressure being cooperatively selected to form a dominant amount of an orthorhombic BSCCO phase in the reacted mixture. The sealed sheath is deformed to form an elongated precursor article of a desired texture; and thereafter heated at a third selected processing temperature in an inert atmosphere with a third selected oxygen partial pressure for a third selected time period. The third processing temperature and third oxygen partial pressure are cooperatively selected to convert at least a portion of the orthorhombic BSCCO phase to the final superconducting BSCCO material.

    摘要翻译： 高品质，高Tc（Bi，Pb）SCCO超导体的生产和加工的新工艺首先制造包含所需化学和结构性质的选定中间相的前体制品。 前体制备包括将具有显着量的四边形BSCCO相的反应混合物引入金属护套中，并将反应的混合物密封在所述护套内，在第二选择的加工温度下在惰性气氛中加热第二选择的氧部分 第二选择时间段的压力，第二加工温度和第二氧分压协同选择以形成反应混合物中正交BSCCO相的显着量。 密封的鞘被变形以形成具有所需纹理的细长的前体制品; 然后在具有第三选择的氧分压的惰性气氛中在第三选择的处理温度下加热第三选定时间段。 协调选择第三加工温度和第三氧分压以将正交BSCCO相的至少一部分转化为最终超导BSCCO材料。

    Production and processing of (Bi,Pb) SCCO superconductors
    7.
    发明授权
    Production and processing of (Bi,Pb) SCCO superconductors 失效
    （Bi，Pb）SCCO超导体的生产和加工

    公开(公告)号：US06295716B1

    公开(公告)日：2001-10-02

    申请号：US08331184

    申请日：1994-10-28

    申请人： Martin W. Rupich ,  William L. Carter ,  Qi Li ,  Alexander Otto ,  Gilbert Riley, Jr.

    发明人： Martin W. Rupich ,  William L. Carter ,  Qi Li ,  Alexander Otto ,  Gilbert Riley, Jr.

    IPC分类号： H01L3924

    CPC分类号： C04B35/65 ,  C04B35/4521 ,  C04B35/4525 ,  H01L39/2419 ,  H01L39/248 ,  Y10S505/736 ,  Y10S505/785 ,  Y10T29/49014

    摘要： A multicomponent powder useful in the formation of BSCCO-2223 is provided comprised of orthorhombic BSCCO-2212 and alkaline earth cuprate, without formation of undesirable secondary phases such as alkaline earth bismuthates and alkaline earth plumbates. A method for the production of the multicomponent powder includes providing a mixture of raw materials comprising constituent metallic elements in a ratio corresponding to a superconducting BSCCO-2223 material and heating the mixture under conditions which form a dominant amount of the orthorhombic BSCCO phase and the alkaline earth cuprate phase while preventing formation of an undesirable secondary phase selected from the group of alkaline earth plumbates and alkaline earth bismuthates. A subsequent heating step converts the multicomponent powder into the BSCCO-2223 and subsequent deformation and annealing processes may be used to form a substantially single phase, highly textured (Bi,Pb)SCCO-2223 superconductor article.

    摘要翻译： 提供了可用于形成BSCCO-2223的多组分粉末，由正交BSCCO-2212和碱土铜酸盐组成，而不形成不需要的第二相，例如碱土金属铋酸盐和碱土金属铅酸铅。 制备多组分粉末的方法包括提供包含构成金属元素的原料的混合物，其比例对应于超导BSCCO-2223材料，并在形成正交BSCCO相的主要量和碱性的条件下加热该混合物 同时防止形成选自碱土金属铅和碱土金属铋酸盐的不期望的二次相。 随后的加热步骤将多组分粉末转化成BSCCO-2223，随后的变形和退火工艺可用于形成基本上单相，高度纹理（Bi，Pb）SCCO-2223超导体制品。

    Processing of oxide superconductors
    10.
    发明授权
    Processing of oxide superconductors 失效
    氧化物超导体的加工

    公开(公告)号：US06284712B1

    公开(公告)日：2001-09-04

    申请号：US09451742

    申请日：1999-11-30

    申请人： Alexander Otto ,  Gilbert N. Riley, Jr. ,  William L. Carter

    发明人： Alexander Otto ,  Gilbert N. Riley, Jr. ,  William L. Carter

    IPC分类号： C04B3564

    CPC分类号： H01L39/2464 ,  Y10S505/742 ,  Y10S505/782 ,  Y10S505/785

    摘要： A method for preparing a BSCCO-2223 oxide superconducting article includes annealing an oxide superconductor article comprised of BSCCO-2223 oxide superconductor at a temperature selected from the range of about 500° C.≦T≦787° C. and an annealing atmosphere having an oxygen pressure selected from within the region having a lower bound defined by the equation, PO2(lower)≧3.5×1010exp(−32,000/T+273) and an upper bound defined by the equation, PO2(upper)≦1.1×1012exp(−32,000/T+273). The article is annealed for a time sufficient to provide at least a 10% increase in critical current density as compared to the critical current density of the pre-anneal oxide superconductor article. An oxide superconductor having the formula Bi2−yPbySr2Ca2Cu3O10+x, where 0≦x≦1.5 and where 0≦y≦0.6 is obtained, the oxide superconductor characterized by a critical transition temperature of greater than 111.0 K, as determined by four point probe method.

    摘要翻译： 制备BSCCO-2223氧化物超导制品的方法包括在选自约500℃的温度范围内对由BSCCO-2223氧化物超导体组成的氧化物超导体制品进行退火。<= T <= 787℃和退火气氛 具有从具有由下式定义的下限的区域内选择的氧气压力：PO2（下）≥3.5×1010exp（-32,000 / T + 273），由上式定义的上限PO2（上）<= 1.1 x1012exp（-32,000 / T + 273）。 与预退火氧化物超导体制品的临界电流密度相比，该制品退火足以提供临界电流密度至少10％的时间。 具有式Bi2-yPbySr2Ca2Cu3O10 + x的氧化物超导体，其中0 <= x <= 1.5，其中0 <= y <= 0.6，所述氧化物超导体的特征在于临界转变温度大于111.0K，如由 四点探针法。