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    Process for producing oxide superconductor
    1.
    发明授权
    Process for producing oxide superconductor 失效
    氧化物超导体的制造方法

    公开(公告)号：US5459124A

    公开(公告)日：1995-10-17

    申请号：US144947

    申请日：1993-10-29

    申请人： Terutsugu Oyama ,  Masato Murakami ,  Naoki Koshizuka ,  Shoji Tanaka

    发明人： Terutsugu Oyama ,  Masato Murakami ,  Naoki Koshizuka ,  Shoji Tanaka

    IPC分类号： C04B35/45 ,  C04B35/64 ,  C04B35/653 ,  H01L39/24 ,  C04B35/505

    CPC分类号： C04B35/4504 ,  C04B35/45 ,  C04B35/64 ,  C04B35/653 ,  H01L39/2419 ,  Y10S505/725

    摘要： A process for producing an oxide superconductor, comprising putting a formed body of raw material powders for forming an oxide superconductor on silver or silver oxide within a pan which does not melt at the melting point of silver, heating the pan to a temperature higher than the melting point of silver to bring the formed body to a semi-molten state with the formed body being floated on molten silver, cooling the pan and taking the formed body out of the re-solidified silver. This process enables a large bulk material having a diameter of 10 cm or more to be produced without occurrence of cracking.

    摘要翻译： 一种氧化物超导体的制造方法，其特征在于，将在所述锅内的银或氧化银上形成氧化物超导体的原料粉末的成形体放置在不在银熔点熔化的锅内，将所述锅加热至高于 银的熔点使成形体处于半熔融状态，其中成形体浮在熔融的银上，冷却盘并将成形体从重新凝固的银中取出。 该方法能够生产直径为10cm或更大的大体积材料而不发生开裂。

    Production of oxide superconductors having large magnetic levitation force
    4.
    发明授权
    Production of oxide superconductors having large magnetic levitation force 失效
    生产具有较大磁悬浮力的氧化物超导体

    公开(公告)号：US5474976A

    公开(公告)日：1995-12-12

    申请号：US39561

    申请日：1993-03-29

    申请人： Akihiro Kondoh ,  Masato Murakami ,  Hiroshi Takaichi ,  Naoki Koshizuka ,  Shoji Tanaka ,  Shoichi Kagiya

    发明人： Akihiro Kondoh ,  Masato Murakami ,  Hiroshi Takaichi ,  Naoki Koshizuka ,  Shoji Tanaka ,  Shoichi Kagiya

    IPC分类号： C04B35/45 ,  C04B35/653 ,  H01L39/12 ,  H01L39/24

    CPC分类号： C04B35/653 ,  C04B35/4504 ,  H01L39/126 ,  H01L39/2483

    摘要： A method for producing an REBaCuO oxide superconductor having large magnetic levitation force, where RE is a rare earth element selected from the group consisting of Y, Sm, Eu, Gd, Dy, Ho, Er, and Yb, involves the steps of using a raw material mixture as the starting feed, heating the raw material mixture for partial melting, followed by cooling and solidification, pulverizing and mixing the resulting solid, shaping the resulting mixture into a given shape, placing or embedding nucleates on or in the resulting shape, followed by heating for partial melting, and cooling the resulting partial melt to a substantial temperature at which a superconducting phase starts to form, followed by slow cooling, whereby the superconducting phase is preferentially formed and grown from a nucleation site.

    摘要翻译： 制备具有大的磁悬浮力的REBaCuO氧化物超导体的方法，其中RE是选自Y，Sm，Eu，Gd，Dy，Ho，Er和Yb的稀土元素，包括使用 原料混合物作为起始原料，加热原料混合物进行部分熔融，然后冷却和固化，粉碎和混合所得固体，将所得混合物成形为给定形状，将成核体放置或嵌入所形成的形状， 然后加热部分熔融，并将所得部分熔体冷却至开始形成超导相的实质温度，然后缓慢冷却，由此优选从成核位点形成和生长超导相。

    Superconductor and method of producing same
    8.
    发明授权
    Superconductor and method of producing same 失效
    超导体及其制造方法

    公开(公告)号：US5849667A

    公开(公告)日：1998-12-15

    申请号：US683915

    申请日：1996-07-19

    申请人： Masato Murakami ,  Sang-Im Yoo ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Takamitsu Higuchi ,  Shoji Tanaka

    发明人： Masato Murakami ,  Sang-Im Yoo ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Takamitsu Higuchi ,  Shoji Tanaka

    IPC分类号： H01L39/12 ,  H01B12/00 ,  C04B35/50

    CPC分类号： H01L39/126 ,  Y10S505/742 ,  Y10S505/778 ,  Y10S505/779 ,  Y10S505/785

    摘要： A high critical temperature and high critical current density superconductor is disclosed which contains a metal oxide expressed by the following formula (I): (R.sup.1.sub.1-x, Ba.sub.x)Ba.sub.2 Cu.sub.3 O.sub.d (I) wherein R.sup.1 stands for at least one element selected from the group consisting of La, Nd, Sm, Eu and Gd, x is a number greater than 0 but not greater than 0.5 and d is a number between 6.2 and 7.2. Fine phases of RE211, RE422 and/or a metal oxide expressed by the formula (R.sup.2.sub.1-z, Ba.sub.z) (Ba.sub.1-y, R.sup.2.sub.y).sub.2 Cu.sub.3 O.sub.p (R.sup.2 =La, Nd, Sm, Eu or Gd) may be dispersed in a matrix of the matrix phase of the formula (I). The above superconductor may be obtained by cooling a melt having a temperature of 1,000.degree.-1,300.degree. C. and containing R.sup.1, Ba, Cu and O at a cooling rate of 5.degree. C./hour or less under a partial pressure of oxygen of between 0.00001 and 0.05 atm, followed by annealing at 250.degree.-600.degree. C. in an oxygen atmosphere.

    摘要翻译： 公开了一种高临界温度和高临界电流密度超导体，其包含由下式（I）表示的金属氧化物:( R11-x，Bax）Ba2Cu3Od（I）其中R1表示选自以下的至少一种元素： 的La，Nd，Sm，Eu和Gd，x是大于0但不大于0.5的数，d是6.2和7.2之间的数。 RE211，RE422和/或由式（R21-z，Baz）（Ba1-y，R2y）2Cu3Op（R2 = La，Nd，Sm，Eu或Gd）表示的金属氧化物的细相可以分散在基质 的式（I）的基质相。 上述超导体可以通过在5℃/小时以下的冷却速度下，在温度为1000〜-1300℃的温度下冷却含有R 1，Ba，Cu和O的熔体， 在0.00001和0.05atm之间，然后在氧气氛中在250-600℃退火。

    Composite of high-temperature superconductive bulk form with coil magnet
    9.
    发明授权
    Composite of high-temperature superconductive bulk form with coil magnet 失效
    高温超导体与线圈磁体复合

    公开(公告)号：US5543768A

    公开(公告)日：1996-08-06

    申请号：US319569

    申请日：1994-10-07

    申请人： Masato Murakami ,  Hiroshi Takaichi ,  Shoji Tanaka ,  Naomichi Sakai

    发明人： Masato Murakami ,  Hiroshi Takaichi ,  Shoji Tanaka ,  Naomichi Sakai

    IPC分类号： H01B13/00 ,  H01F6/00 ,  H01F6/06 ,  H01F1/00

    CPC分类号： H01F6/06

    摘要： A composite magnet comprising a core of R-Ba-Cu-O type bulk superconductor (R denotes rare-earth elements) made by melt process, enclosed around it with normal conductive or superconductive coil, or a composite magnet including a center of normal conductive or superconductive coil, enclosed around it with ring-shaped R-Ba-Cu-O type bulk superconductor (R denotes rare-earth elements) made by melt process is disclosed, which allows easy control of generating magnetic field and gives a relatively strong magnetic field even at a temperature as high as that of liquid nitrogen.

    摘要翻译： 一种复合磁体，包括由熔融法制成的R-Ba-Cu-O型体超导体（R表示稀土元素）的核心，用正常的导电或超导线圈封闭，或者包括正常导电中心的复合磁体 或超导线圈，其周围围绕着由熔体制造的环形R-Ba-Cu-O型体超导体（R表示稀土元素）包围，这允许容易地控制产生磁场并产生相对强的磁 即使在与液氮相同的温度下也是如此。

    Superconductor and method of producing same
    10.
    发明授权
    Superconductor and method of producing same 失效
    超导体及其制造方法

    公开(公告)号：US5525584A

    公开(公告)日：1996-06-11

    申请号：US452138

    申请日：1995-05-26

    申请人： Masato Murakami ,  Sang-Im Yoo ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Takamitsu Higuchi ,  Shoji Tanaka

    发明人： Masato Murakami ,  Sang-Im Yoo ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Takamitsu Higuchi ,  Shoji Tanaka

    IPC分类号： H01L39/12 ,  H01B12/00

    CPC分类号： H01L39/126 ,  Y10S505/742 ,  Y10S505/778 ,  Y10S505/779 ,  Y10S505/785

    摘要： A high critical temperature and high critical current density superconductor is disclosed which contains a metal oxide expressed by the following formula (I):(R.sup.1.sub.1-x,Ba.sub.x)Ba.sub.2 Cu.sub.3 O.sub.d (I)wherein R.sup.1 stands for at least one element selected from the group consisting of La, Nd, Sm, Eu and Gd, x is a number greater than 0 but not greater than 0.5 and d is a number between 6.2 and 7.2. Fine phases of RE211, RE422 and/or a metal oxide expressed by the formula (R.sup.2.sub.1-z, Ba.sub.z) (Ba.sub.1-y, R.sup.2.sub.y).sub.2 Cu.sub.3 O.sub.p (R.sup.2 =La, Nd, Sm, Eu or Gd) may be dispersed in a matrix of the matrix phase of the formula (I). The above superconductor may be obtained by cooling a melt having a temperature of 1,000.degree.-1,300.degree. C. and containing R.sup.1, Ba, Cu and O at a cooling rate of 5.degree. C./hour or less under a partial pressure of oxygen of between 0.00001 and 0.05 atm, followed by annealing at 250.degree.-600.degree. C. in an oxygen atmosphere.

    摘要翻译： 公开了一种高临界温度和高临界电流密度超导体，其包含由下式（I）表示的金属氧化物：（R11-x，Bax）Ba2Cu3Od（I）其中R1代表选自以下的至少一种元素： 的La，Nd，Sm，Eu和Gd，x是大于0但不大于0.5的数，d是6.2和7.2之间的数。 RE211，RE422和/或由式（R21-z，Baz）（Ba1-y，R2y）2Cu3Op（R2 = La，Nd，Sm，Eu或Gd）表示的金属氧化物的细相可以分散在基质 的式（I）的基质相。 上述超导体可以通过在5℃/小时以下的冷却速度下，在温度为1000〜-1300℃的温度下冷却含有R 1，Ba，Cu和O的熔体， 在0.00001和0.05atm之间，然后在氧气氛中在250-600℃退火。