公开(公告)号：US5389604A

公开(公告)日：1995-02-14

申请号：US77378

申请日：1993-06-17

申请人： Masato Murakami ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Akihiro Kondoh ,  Shoichi Kagiya ,  Naomichi Nakamura ,  Hiroyuki Fujimoto ,  Naoki Koshizuka ,  Shoji Tanaka

发明人： Masato Murakami ,  Naomichi Sakai ,  Hiroshi Takaichi ,  Akihiro Kondoh ,  Shoichi Kagiya ,  Naomichi Nakamura ,  Hiroyuki Fujimoto ,  Naoki Koshizuka ,  Shoji Tanaka

IPC分类号： C01G1/00 ,  C01G3/00 ,  C30B11/00 ,  C30B29/22 ,  H01B12/00 ,  H01B13/00 ,  H01L39/24 ,  H01B1/00 ,  H01L39/00

CPC分类号： H01L39/2419 ,  Y10S505/742 ,  Y10S505/78

摘要： To ensure a well-oriented crystal structure, there is provided a process of producing an oxide superconductor of a Y--Ba--Cu--O system with a composition having an atomic ratio Y:Ba:Cu of 1.0-2.0:2.0-2.5:3.0-3.5, the process comprising the steps of: preparing a semimelt including solid and liquid phases and consisting of Y, Ba, Cu and O in the atomic ratio; and solidifying the semimelt to form the oxide superconductor by so controlling a moving speed of a solidification front to have two components of different values in two perpendicularly intersecting directions.

摘要翻译： 为了确保良好取向的晶体结构，提供了具有原子比Y：Ba:Cu的组成为1.0-2.0:2.0-2.5:1的Y-Ba-Cu-O系的氧化物超导体的方法： 3.0-3.5，该方法包括以下步骤：制备包含固相和液相并且以原子比为Y，Ba，Cu和O组成的半固态; 并通过控制固化前沿的移动速度在两个垂直相交的方向上具有不同值的两个分量来固化半固化物以形成氧化物超导体。

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。

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。

公开(公告)号：US5430010A

公开(公告)日：1995-07-04

申请号：US73656

申请日：1993-06-08

申请人： Masato Murakami ,  Terutsugu Oyama ,  Hiroyuki Fujimoto ,  Naoki Koshizuka ,  Yu Shiohara ,  Shoji Tanaka

发明人： Masato Murakami ,  Terutsugu Oyama ,  Hiroyuki Fujimoto ,  Naoki Koshizuka ,  Yu Shiohara ,  Shoji Tanaka

IPC分类号： C04B35/45 ,  C04B35/653 ,  H01L39/24 ,  H01B12/00 ,  H01L39/12

CPC分类号： C04B35/653 ,  C04B35/4504 ,  H01L39/2419 ,  Y10S505/725 ,  Y10S505/733 ,  Y10S505/742

摘要： The present invention relates to a process for preparing an oxide superconductor having a high critical current density, a uniform structure and an excellent mechanical property and thermal stability, which comprises heating raw material powders of a REBaCuO system at 1050.degree. C. or higher, cooling the material for solidification, pulverizing and mixing the solidified material to homogeneously disperse the structure of the solidified material, molding the material, optionally mixed with silver oxide or silver, into a predetermined shape, and reheating the molding to 1050.degree. C. or higher to grow a superconducting phase.

摘要翻译： 本发明涉及一种制备具有高临界电流密度，均匀结构和优异的机械性能和热稳定性的氧化物超导体的方法，其包括在1050℃或更高温度下加热REBaCuO体系的原料粉末，冷却 用于固化，粉碎和混合固化材料以均匀分散固化材料的结构的材料，将任选地与氧化银或银混合的材料成型为预定形状，并将模具再加热至1050℃以上至 成长超导阶段

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。

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。

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。

公开(公告)号：US5169830A

公开(公告)日：1992-12-08

申请号：US567958

申请日：1990-08-15

申请人： Takahiro Wada ,  Shinichi Koriyama ,  Takeshi Sakurai ,  Nobuo Suzuki ,  Takayuki Miyatake ,  Hisao Yamauchi ,  Naoki Koshizuka ,  Shoji Tanaka

发明人： Takahiro Wada ,  Shinichi Koriyama ,  Takeshi Sakurai ,  Nobuo Suzuki ,  Takayuki Miyatake ,  Hisao Yamauchi ,  Naoki Koshizuka ,  Shoji Tanaka

IPC分类号： H01L39/12

CPC分类号： H01L39/126 ,  Y10S505/778

摘要： A superconductive material is disclosed which has the following composition:(R.sub.1-x Ca.sub.x)(Ba.sub.1-y La.sub.y).sub.2 Cu.sub.4 O.sub.8wherein R is at least one element selected from Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, x is a number in the range of 0-0.3 and y is a number in the range of 0.001-0.3 with the proviso that y is not greater than 0.2 when x is not 0.

公开(公告)号：US5468724A

公开(公告)日：1995-11-21

申请号：US68587

申请日：1993-05-27

申请人： Takahiro Wada ,  Shin-ichi Koriyama ,  Takeshi Sakurai ,  Nobuo Suzuki ,  Takayuki Miyatake ,  Hisao Yamauchi ,  Naoki Koshizuka ,  Shoji Tanaka

发明人： Takahiro Wada ,  Shin-ichi Koriyama ,  Takeshi Sakurai ,  Nobuo Suzuki ,  Takayuki Miyatake ,  Hisao Yamauchi ,  Naoki Koshizuka ,  Shoji Tanaka

IPC分类号： C01G3/00 ,  C04B35/45 ,  H01L39/12 ,  H01B12/00

CPC分类号： C01G3/006 ,  C04B35/4504 ,  H01L39/126 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2002/88 ,  C01P2004/80 ,  C01P2006/14 ,  Y10S505/779 ,  Y10S505/78

摘要： Disclosed herein are high-temperature oxide superconductors of RBa.sub.2 Cu.sub.4 O.sub.8 type, with Ba partly replaced by Sr or Ca, or with R and Ba partly replaced by Ca and Sr, respectively, as represented by the chemical composition formula of R(Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.4 O.sub.8 or R(Ba.sub.1-z Ca.sub.z).sub.2 Cu.sub.4 O.sub.8 or (R.sub.1-x Ca.sub.x) (Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.4 O.sub.8. They exhibit superconductivity at high temperatures. Especially, the last one exhibits superconductivity at a higher temperature than the former two. All of them can be made with a less amount of Ba as a deleterious substance, and the first two have improved sinterability. The best results are obtained when they are produced by the process involving the hot hydrostatic pressure treatment of the mixture of raw materials at 850.degree.-1100.degree. C. in an atmosphere composed of an inert gas and oxygen. The process permits a wider selection of Ba raw materials.

摘要翻译： 本文公开了RBa2Cu4O8型的高温氧化物超导体，其中Ba部分被Sr或Ca取代，或者R和Ba分别被Ca和Sr部分替代，如R（Ba1-ySry）2Cu4O8的化学组成式所示 或R（Ba1-zCaz）2 Cu4O8或（R1-xCax）（Ba1-ySry）2Cu4O8。 它们在高温下表现出超导性。 特别地，最后一个在比前两个更高的温度下表现出超导性。 所有这些都可以用少量的Ba作为有害物质，前两种具有改善的烧结性。 通过在惰性气体和氧气组成的气氛中，在850〜-1100℃的原料混合物进行热静水压处理的方法制造时，得到最好的结果。 该过程允许更广泛地选择Ba原料。

公开(公告)号：US06541789B1

公开(公告)日：2003-04-01

申请号：US09385710

申请日：1999-08-30

申请人： Tetsuro Sato ,  Jian-Guo Wen ,  Naoki Koshizuka ,  Shoji Tanaka

发明人： Tetsuro Sato ,  Jian-Guo Wen ,  Naoki Koshizuka ,  Shoji Tanaka

IPC分类号： H01L3922

CPC分类号： H01L39/2496 ,  H01L39/225

摘要： In a method of manufacturing a Josephson junction, a first superconductive layer is formed on a substrate. An insulating film is formed on the first superconductive layer. The insulating film is etched to have an inclination portion. The first superconductive layer is etched using the etched insulating film as a mask, to have an inclination portion. A barrier layer is formed on a surface of the inclination portion of the first superconductive layer. A second superconductive layer is formed on the barrier layer and the inclination portion of the insulating layer.

摘要翻译： 在制造约瑟夫逊结的方法中，在基板上形成第一超导层。 绝缘膜形成在第一超导层上。 绝缘膜被蚀刻以具有倾斜部分。 使用蚀刻绝缘膜作为掩模蚀刻第一超导层，以具有倾斜部分。 在第一超导层的倾斜部分的表面上形成阻挡层。 在隔离层和绝缘层的倾斜部分上形成第二超导层。