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165 条记录 (耗时 0.042 秒)

    Method for preparing an oxide crystal
    91.
    发明授权
    Method for preparing an oxide crystal 失效
    氧化物晶体的制备方法

    公开(公告)号：US5707441A

    公开(公告)日：1998-01-13

    申请号：US569895

    申请日：1995-12-08

    申请人： Yasuo Namikawa ,  Yuh Shiohara ,  Shoji Tanaka

    发明人： Yasuo Namikawa ,  Yuh Shiohara ,  Shoji Tanaka

    IPC分类号： C01G1/00 ,  C01G3/00 ,  C01G3/02 ,  C30B15/00 ,  C30B15/20 ,  C30B15/22 ,  C30B29/22 ,  H01B12/00 ,  H01B13/00

    CPC分类号： C30B29/225 ,  C30B15/20 ,  Y10T117/1004

    摘要： In order to prepare a large yttrium or lanthanoid based oxide superconductor crystal of higher quality, a method and an apparatus which can stably control the shape of a pulled crystal and stably maintain growth of the crystal from a melt are provided. A crystal of an oxide having a structure of RBa.sub.2 Cu.sub.3 O.sub.7-X (R: yttrium or lanthanoid element, 0.ltoreq.X.ltoreq.1) is pulled from a raw material melt which is stored in a crucible by a rotary crystal pulling shaft. During such pulling, a position of the surface of the raw material melt is measured with time to obtain a lowering speed of the surface in a direction substantially parallel to the crystal pulling direction, for adjusting the lifting speed of the crystal pulling shaft by this lowering speed.

    摘要翻译： 为了制备更高质量的大型钇或镧系氧化物超导体晶体，提供了可以稳定地控制拉晶体的形状并稳定地保持晶体从熔体生长的方法和装置。 具有RBa2Cu3O7-X（R：钇或镧系元素，0

    Oxide superconductor and method of producing same
    92.
    发明授权
    Oxide superconductor and method of producing same 失效
    氧化物超导体及其制造方法

    公开(公告)号：US5670457A

    公开(公告)日：1997-09-23

    申请号：US356640

    申请日：1994-12-15

    申请人： Seiji Adachi ,  Changqin Jin ,  Xiao-Jing Wu ,  Hisao Yamauchi ,  Shoji Tanaka

    发明人： Seiji Adachi ,  Changqin Jin ,  Xiao-Jing Wu ,  Hisao Yamauchi ,  Shoji Tanaka

    IPC分类号： C01G1/00 ,  C01G3/00 ,  H01B12/00 ,  H01B13/00 ,  H01L39/12 ,  C04B35/01 ,  C04B35/03

    CPC分类号： H01L39/126 ,  Y10S505/776 ,  Y10S505/778

    摘要： An oxide superconductor composed of Cu, O and at least one of Ba, Sr and Ca and including alternately arranged at least one oxygen-deficient perovskite structure section and at least one infinite layer structure section, wherein the perovskite structure section consists of two first atomic layers and a second atomic layer sandwiched between the first layers, and wherein the infinite layer structure section consists of alternately arranged, third and fourth atomic layers. Each of the first layers consists of O and an element M.sup.1 selected from Ba, Sr and Ca and has an atomic ratio O/M.sup.1 of 1 or less, while the second layer consists of O and Cu and has an atomic ratio O/Cu of 2 or less. Each of the third layers consists of O and Cu and has an atomic ratio O/Cu of 2, while each of the fourth layers consists of an element M.sup.2 selected from Ba, Sr and Ca. A superconductor having a superconducting critical temperature of over 100 K. may be produced by heat treatment at 800.degree.-1,200.degree.C. under a super-high pressure of 20,000-80,000 atm.

    摘要翻译： 由Cu，O和Ba，Sr和Ca中的至少一种构成的氧化物超导体，包括交替排列至少一个缺氧钙钛矿结构部分和至少一个无限层结构部分，其中钙钛矿结构部分由两个第一原子 层和夹在第一层之间的第二原子层，并且其中无限层结构部分由交替排列的第三和第四原子层组成。 每个第一层由O和选自Ba，Sr和Ca的元素M1组成，并且具有1或更小的原子比O / M1，而第二层由O和Cu组成，并且原子比O / Cu为 2以下。 每个第三层由O和Cu组成，并且原子比O / Cu为2，而每个第四层由选自Ba，Sr和Ca的元素M2组成。 具有超导临界温度超过100K的超导体可以通过在20000-80,000大气压的超高压下在800-1200℃下进行热处理来制备。

    N-type oxide superconductor represented by the formula (Nd.sub.x (Ce.sub.y L.sub.z).sub.2 CuO.sub.4-d where L is La, Mg or a mixture of alakaline earth elements
    96.
    发明授权
    N-type oxide superconductor represented by the formula (Nd.sub.x (Ce.sub.y L.sub.z).sub.2 CuO.sub.4-d where L is La, Mg or a mixture of alakaline earth elements 失效
    由式（Ndx（CeyLz）2CuO4-d表示的N型氧化物超导体，其中L是La，Mg或碱土金属元素的混合物

    公开(公告)号：US5244871A

    公开(公告)日：1993-09-14

    申请号：US772123

    申请日：1991-10-09

    申请人： Takeshi Sakurai ,  Toru Yamashita ,  Hisao Yamauchi ,  Shoji Tanaka

    发明人： Takeshi Sakurai ,  Toru Yamashita ,  Hisao Yamauchi ,  Shoji Tanaka

    IPC分类号： C01G3/00 ,  C04B35/45 ,  H01L39/12

    CPC分类号： C01G3/006 ,  C04B35/4504 ,  H01L39/126 ,  Y10S505/775 ,  Y10S505/779 ,  Y10S505/80 ,  Y10S505/801 ,  Y10S505/809 ,  Y10S505/81

    摘要： An oxide superconductor comprises a composition represented by the composition formula: (Nd.sub.x --Ce.sub.y --L.sub.z).sub.2 CuO.sub.4-d (wherein L is an element selected from Ca and Mg, and x+y+z=1). The compositions of Nd, Ce and L of the oxide superconductor corresponds to a point falling inside an area of Nd--Ce--L ternary diagram surrounded by straight lines (A-B), (B-C), (C-D) and (D-A) connecting point (A) with point (B), point (B) with point (C), point (C) with point (D) and point (D) with point (A), respectively, the points (A), (B), (C) and (D) being points (x=1, y=0, z=0), (x=0.4, y=0.6, z=0), (x=0.4, y=0.3, z=0.3) and (x=0.1, y=0, z=0.9), respectively, in the Nd--Ce--L ternary diagram. Above-described Nd--Ce--L--Cu--O oxides can exhibit superconductivity within a wide range of composition when heat-treated in an atmosphere of nitrogen.

    摘要翻译： 氧化物超导体包括由组成式（Nd x -Cey-Lz）2 CuO 4 -d（其中L是选自Ca和Mg，x + y + z = 1的元素）表示的组合物。 氧化物超导体的Nd，Ce和L的组成对应于由直线（AB），（BC），（CD）和（DA）连接点包围的Nd-Ce-L三元图形区域内的点 （A），（B），（B），点（B），点（C），点（C）和点（D）和点（D） （x = 0.4，y = 0.6，z = 0），（x = 0.4，y = 0.3，z = 0.3）（C）和（D） 和Nd-Ce-L三元图中的（x = 0.1，y = 0，z = 0.9）。 当在氮气气氛中进行热处理时，上述Nd-Ce-L-Cu-O氧化物可在宽范围的组成范围内表现出超导性。