利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

165 条记录 (耗时 0.029 秒)

    Method of retaining melt of oxide
    4.
    发明授权
    Method of retaining melt of oxide 失效
    保留氧化物熔体的方法

    公开(公告)号：US5632811A

    公开(公告)日：1997-05-27

    申请号：US420519

    申请日：1995-04-12

    申请人： Yasuo Namikawa ,  Yasuji Yamada ,  Satoshi Koyama ,  Yuh Shiohara ,  Shoji Tanaka

    发明人： Yasuo Namikawa ,  Yasuji Yamada ,  Satoshi Koyama ,  Yuh Shiohara ,  Shoji Tanaka

    IPC分类号： C30B9/00 ,  C30B15/00 ,  C30B15/12 ,  C30B29/22 ,  H01B13/00 ,  H01L21/208 ,  C30B29/16

    CPC分类号： C30B29/225 ,  C30B15/12 ,  C30B9/00

    摘要： In order to stably retain an oxide-based melt consisting essentially of yttrium or a lanthanoid element, barium, copper and oxygen at a prescribed temperature with no impurity contamination thereby preparing a large oxide crystal of high quality from the melt, an oxide melt consisting essentially of yttrium or a lanthanoid element, barium, copper and oxygen is stored in a first crucible, which in turn is held in a second crucible. The first crucible is made of a material which is an oxide of at least one element forming the melt having a melting point higher by at least 10.degree. C. than a melt retention temperature and causing no structural phase transition up to a temperature higher by 10.degree. C. than the aforementioned prescribed temperature, with solubility of not more than 5 atomic percent with respect to the melt in a temperature range from the room temperature to a temperature higher by 10.degree. C. than the melt retention temperature. The second crucible is made of a material substantially causing neither melting nor chemical reaction with respect to the oxide-based melt, which can retain the melt more stably than the first material. Even if the melt overflows the first crucible, this overflow is suppressed by the second crucible. It is possible to prepare a crystal of an oxide superconductor such as YBa.sub.2 Cu.sub.3 O.sub.7-x (0.ltoreq.X.ltoreq.1) by the pulling method from the melt which is stored in the first crucible.

    摘要翻译： 为了稳定地保持基本上由钇或镧系元素，钡，铜和氧组成的氧化物基熔体，在规定的温度下没有杂质污染，从而从熔体制备高质量的大的氧化物晶体，基本上由 的钇或镧系元素，钡，铜和氧储存在第一坩埚中，第一坩埚又保持在第二坩埚中。 第一坩埚由至少一种形成熔体的元素的氧化物的材料制成，其熔点比熔融保持温度高至少10℃，并且不会导致结构相变达到高于10℃的温度 ℃以上的规定温度，相对于熔体，在室温至高于熔融保持温度10℃的温度范围内的溶解度为5原子％以下。 第二坩埚由相对于基于氧化物的熔体基本上不熔化和化学反应的材料制成，其可以比第一材料更稳定地保持熔体。 即使熔体溢出第一坩埚，这种溢流被第二坩埚抑制。 可以通过从存储在第一坩埚中的熔体的拉伸方法制备氧化物超导体的晶体，例如YBa2Cu3O7-x（0≤X1）。

    Composite material and method of preparing same
    5.
    发明授权
    Composite material and method of preparing same 失效
    复合材料及其制备方法

    公开(公告)号：US5536704A

    公开(公告)日：1996-07-16

    申请号：US240067

    申请日：1994-05-09

    申请人： Yasuji Yamada ,  Minoru Tagami ,  Masaru Nakamura ,  Hideki Sakai ,  Koichi Uehara ,  Yuh Shiohara ,  Shoji Tanaka

    发明人： Yasuji Yamada ,  Minoru Tagami ,  Masaru Nakamura ,  Hideki Sakai ,  Koichi Uehara ,  Yuh Shiohara ,  Shoji Tanaka

    IPC分类号： C01G1/00 ,  C30B15/00 ,  C30B29/22 ,  H01L39/02 ,  H01L39/24 ,  C30B19/02

    CPC分类号： C30B29/225 ,  C30B15/00 ,  H01L39/2461 ,  Y10S505/729

    摘要： A composite material comprising a bulky substrate of a Y-series 123 metal oxide crystal, and at least one layer provided on a surface of the substrate and formed of a crystal of a Y-series 123 metal oxide. The substrate may be produced by immersing a seed material in a liquid phase which comprises components constituting the metal oxide. The liquid phase contains a solid phase located at a position different from the position at which the seed material contacts the liquid phase. The solid phase provides the liquid phase with solutes which constitute the Y-series 123 metal oxide so that the solutes are transported to the position at which the seed material and the liquid phase contact, thereby permitting the Y-series 123 metal oxide to grow on the seed material as primary crystals and to obtain the bulky substrate. The layer of a Y-series 123 metal oxide may be formed on the substrate by a sputtering method, a vacuum deposition method, a laser abrasion method, a CVD method or a liquid phase epitaxy method.

    摘要翻译： 一种复合材料，其特征在于，包括Y系123金属氧化物晶体的体积大的基板，以及设置在所述基板的表面上的由Y系123金属氧化物晶体形成的至少一层。 基材可以通过将种子材料浸入包含构成金属氧化物的组分的液相中来制备。 液相含有位于与种子材料接触液相的位置不同的位置的固相。 固相为构成Y系123金属氧化物的溶质提供液相，使得溶质被输送到种子材料和液相接触的位置，从而允许Y系列123金属氧化物生长 种子材料作为主要晶体并获得体积大的底物。 可以通过溅射法，真空沉积法，激光磨蚀法，CVD法或液相外延法在基板上形成Y系123金属氧化物层。

    Superconductor and precursor therefor, their preparation and use of superconductor
    6.
    发明授权
    Superconductor and precursor therefor, their preparation and use of superconductor 失效
    超导体及其前体，其超导体的制备和使用

    公开(公告)号：US5872079A

    公开(公告)日：1999-02-16

    申请号：US762211

    申请日：1996-12-06

    申请人： Masaru Nakamura ,  Yasuji Yamada ,  Jian-Guo Wen ,  Yuh Shiohara ,  Shoji Tanaka

    发明人： Masaru Nakamura ,  Yasuji Yamada ,  Jian-Guo Wen ,  Yuh Shiohara ,  Shoji Tanaka

    IPC分类号： C04B35/45 ,  C01G1/00 ,  C01G3/00 ,  H01B12/02 ,  H01B13/00 ,  H01L39/12 ,  H01L39/24 ,  H01B12/00 ,  C04B35/50 ,  C04B35/622

    CPC分类号： H01L39/126 ,  Y10S505/78 ,  Y10S505/819

    摘要： A superconductor comprising a compound of the formula (II):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y1 (II)wherein not less than 40% of a crystal of the superconductor shows phase separation, and at (temperature, magnetic field) of (77�K!, O�T!) and (77�K!, 4�T!), a critical current density is not less than 10,000 A/cm.sup.2, which is obtained by heating a precursor which is a solid solution of the formula (I):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y (I)wherein not more than 10% of a crystal of the solid solution shows phase separation, so that phase separation is formed in the crystals at a phase separation temperature, and introducing oxygen; and a superconductor comprising a compound of the formula (II):R.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-y1 (II)wherein not more than 10% of a crystal of the superconductor shows phase separation, and in a magnetic field of not less than 1�T! at a constant temperature of 77�K!, a critical current density is less than 10,000 A/cm.sup.2, which is obtained by introducing oxygen into the precursor (I) at a temperature less than the lower limit of the phase separation temperature. According to the method of the present invention, a superconductor having a high Jc or having different properties with respect to Jc, which is unobtainable by the conventional production method, can be obtained using the conventional materials.

    摘要翻译： 包含式（II）化合物的超导体：R1 + xBa2-xCu3O7-y1（II）其中不低于40％的超导体的晶体显示相分离，并且在（77℃）的（温度， K]，O [T]）和（77 [K]，4 [T]），临界电流密度不小于10,000A / cm 2，这是通过加热作为式 I）：R1 + xBa2-xCu3O7-y（I）其中不超过10％的固溶体晶体显示相分离，从而在相分离温度下在晶体中形成相分离并引入氧; 以及包含式（II）的化合物的超导体：R1 + xBa2-xCu3O7-y1（II）其中不超过10％的超导体的晶体显示相分离，并且在不小于1 [ T]在77 [K]的恒定温度下，临界电流密度小于10,000A / cm 2，其通过在低于相分离温度的下限的温度下将氧引入前体（I）而获得。 根据本发明的方法，可以使用常规材料获得具有高Jc或具有相对于Jc的不同性能的超导体，其通过常规制备方法是不可获得的。

    Method for preparing oxide superconductors
    9.
    发明授权
    Method for preparing oxide superconductors 失效
    制备氧化物超导体的方法

    公开(公告)号：US5998338A

    公开(公告)日：1999-12-07

    申请号：US47127

    申请日：1998-03-24

    申请人： Yasuo Watanabe ,  Akihiko Endo ,  Takateru Umeda ,  Yuh Shiohara ,  Shoji Tanaka

    发明人： Yasuo Watanabe ,  Akihiko Endo ,  Takateru Umeda ,  Yuh Shiohara ,  Shoji Tanaka

    IPC分类号： C01G1/00 ,  C01G3/00 ,  C30B29/22 ,  H01L39/12 ,  H01L39/24 ,  C04B35/653

    CPC分类号： H01L39/126 ,  H01L39/2419 ,  H01L39/2483

    摘要： There is provided a method for stably preparing rare earth (RE) 123 type oxide superconductors exhibiting outstanding superconductive properties in the atmosphere. In the method for preparing RE 123-type oxide superconductors by melting, cooling and solidifying a starting composition containing one or more than two kinds of RE such as Y, Sm, Nd, etc., and Ba, Cu and O as constituent elements to crystallize the RE 123-type oxide superconductors, the quantity of replacement between RE and Ba in "RE 123 crystals to be formed" is controlled by changing the initial constitution of the starting composition, for example, by changing the initial constitution to a more Ba-rich side than a composition on a 123-211 (or 422) tie line on a phase diagram to yield RE 123-type oxide superconductors in the atmosphere, which exhibits a critical temperature of 90 K or above and higher critical current density (Jc) in a magnetic field. A trace amount of Pt or CeO.sub.3 may be added to micronize the 211 (or 422) phase so as to further improve Jc.

    摘要翻译： 提供了一种稳定地制备在大气中表现出优异的超导性能的稀土（RE）123型氧化物超导体的方法。 在通过熔融，冷却和固化含有一种或多于两种的诸如Y，Sm，Nd等的RE的起始组合物和作为组成元素的Ba，Cu和O的制备RE 123型氧化物超导体的方法中， 使RE 123型氧化物超导体结晶，通过改变起始组成的初始构成来控制“待形成的RE 123晶体中的RE和Ba之间的置换量”，例如通过将初始构成改变为更多的Ba 在相图上的123-211（或422）连接线上的组合物，在大气中产生RE 123型氧化物超导体，其表现出临界温度为90K或更高和更高的临界电流密度（Jc ）在磁场中。 可以添加痕量的Pt或CeO 3以使211（或422）相微粉化，以进一步提高Jc。

    Method for preparing an oxide crystal
    10.
    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