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    In-situ laser ablation method for forming oxide superconducting films
    1.
    发明授权
    In-situ laser ablation method for forming oxide superconducting films 失效
    用于形成氧化物超导膜的原位激光烧蚀方法

    公开(公告)号：US5360785A

    公开(公告)日：1994-11-01

    申请号：US59428

    申请日：1993-05-07

    申请人： Noriyuki Yoshida ,  Satoshi Takano ,  Shigeru Okuda ,  Noriki Hayashi ,  Tsukushi Hara ,  Kiyoshi Okaniwa ,  Takahiko Yamamoto

    发明人： Noriyuki Yoshida ,  Satoshi Takano ,  Shigeru Okuda ,  Noriki Hayashi ,  Tsukushi Hara ,  Kiyoshi Okaniwa ,  Takahiko Yamamoto

    IPC分类号： C23C14/08 ,  C23C14/28 ,  H01L39/24 ,  B05D3/06 ,  B05D5/12

    CPC分类号： H01L39/2448 ,  C23C14/087 ,  C23C14/28 ,  Y10S505/73 ,  Y10S505/732

    摘要： In a method of preparing an oxide superconducting thin film having a composition of Y-Ba-Cu-O, for example, using laser ablation, which comprises the steps of applying a laser beam to a target containing components of an oxide superconductive material and depositing particles, being thereby scattered from the target, on a substrate, the oxygen gas flow rate during film deposition is set to be at least 50 SCCM, the oxygen gas pressure during film deposition is set to be 10 to 1000 mTorr, the distance between a target 9 and a substrate 10 is set to be 40 to 100 mm, the temperature of the substrate 10 is set to be 600.degree. to 800.degree. C., the energy density of a laser beam 7 on the surface of the target 9 is set to be at least 1 J/cm.sup.2, and the laser pulse energy is set to be at least 10 mJ.

    摘要翻译： 在制备具有例如使用激光烧蚀的Y-Ba-Cu-O组成的氧化物超导薄膜的方法中，包括以下步骤：将激光束施加到包含氧化物超导材料的组分的靶上，并沉积 颗粒从靶上散布在基板上，成膜期间的氧气流量设定为至少50SCCM，成膜期间的氧气压力设定为10〜1000mTorr，a 靶材9和基板10被设定为40〜100mm，将基板10的温度设定为600〜800℃，设定目标9的表面上的激光束7的能量密度 为至少1J / cm 2，激光脉冲能量设定为至少10mJ。

    Superconducting thin film having a matrix and foreign phases
    5.
    发明授权
    Superconducting thin film having a matrix and foreign phases 失效
    超薄薄膜有一个矩阵和外部相位

    公开(公告)号：US5212151A

    公开(公告)日：1993-05-18

    申请号：US623477

    申请日：1990-12-07

    申请人： Satoshi Takano ,  Shigeru Okuda ,  Noriyuki Yoshida ,  Tsukushi Hara ,  Kiyoshi Okaniwa ,  Takahiko Yamamoto

    发明人： Satoshi Takano ,  Shigeru Okuda ,  Noriyuki Yoshida ,  Tsukushi Hara ,  Kiyoshi Okaniwa ,  Takahiko Yamamoto

    IPC分类号： C23C14/08 ,  C23C14/28 ,  H01L39/24

    CPC分类号： C23C14/087 ,  C23C14/28 ,  H01L39/2448 ,  Y10S428/93 ,  Y10S505/701 ,  Y10S505/732

    摘要： An oxide superconducting thin film formed by laser ablation comprises a matrix formed of c-axis oriented superconducting phases and foreign phases which are different in crystal orientation from the matrix. In order to improve critical current density of the oxide superconducting thin film, preferably selected are such conditions that the size of each superconducting phase in its a-b plane is not more than 0.1 .mu.m in diameter, the size of each superconducting phase along its c-axis direction is equal to the thickness of the oxide superconducting thin film, the foreign phases at least partially pass through the oxide superconducting thin film along the direction of thickness, the size of each foreign phase is at least 0.01 .mu.m and not more than 5 .mu.m in diameter, each foreign phase has an a-axis or a c-axis perpendicularly oriented with respect to the major surface of the oxide superconducting thin film, and the like.

    摘要翻译： 通过激光烧蚀形成的氧化物超导薄膜包括由c轴取向的超导相和与基体的晶体取向不同的异相形成的基体。 为了提高氧化物超导薄膜的临界电流密度，优选选择这样的条件，即其ab面中的每个超导相的尺寸的直径不大于0.1μm，每个超导相沿其c- 轴向等于氧化物超导薄膜的厚度，异相至少部分地沿着厚度方向通过氧化物超导薄膜，每个异相的尺寸为至少0.01μm且不大于5 每个异相具有相对于氧化物超导薄膜的主表面垂直取向的a轴或c轴等。

    Superconducting AC current limiter equipped with quick-recoverable trigger coils
    7.
    发明授权
    Superconducting AC current limiter equipped with quick-recoverable trigger coils 失效
    超导交流电流限制器配有快速可恢复的触发线圈

    公开(公告)号：US5225956A

    公开(公告)日：1993-07-06

    申请号：US723307

    申请日：1991-06-28

    申请人： Tsukushi Hara ,  Kiyoshi Okaniwa ,  Kazuyuki Tsurunaga ,  Mitsuhito Sawamura ,  Yoshihisa Masuda ,  Daisuke Ito

    发明人： Tsukushi Hara ,  Kiyoshi Okaniwa ,  Kazuyuki Tsurunaga ,  Mitsuhito Sawamura ,  Yoshihisa Masuda ,  Daisuke Ito

    IPC分类号： H01L39/16 ,  H02H9/02

    CPC分类号： H01L39/16 ,  H02H9/023 ,  H01F2006/001 ,  Y02E40/69 ,  Y10S505/85

    摘要： In a superconducting AC (alternating current) current limiter, quenched trigger coil assembly is quickly recovered to the superconductive state by minimizing a loop current flowing through the trigger coil assembly. The superconducting AC current limiter comprises: a cylindrical core; a superconducting current limiting coil wound on the core, and inserted into an AC power transmission line, for limiting an overcurrent flowing through the AC power transmission line when a failure happens to occur therein; a superconducting trigger coil assembly coaxially wound inside the superconducting current limiting coil on the core, and magnetically coupled to the current limiting coil, for triggering current limiting operation by the current limiting coil when most of the overcurrent flows through the trigger coil assembly, the superconducting trigger coil assembly being arranged by first, second, third and fourth trigger coils in such a manner that the first trigger coil is series-connected to the fourth trigger coil thereby to constitute a first series trigger coil circuit, the second trigger coil is series-connected to the third trigger coil thereby to constitute a second series trigger coil circuit, the first and second series trigger coil circuits are connected in parallel with each other, one end of which is connected to one end of the superconducting current limiting coil and the other end of which is connected via a quenching switch to the other end of the current.