发明名称 |
Oxide high-temperature superconducting material, method of preparing same and superconducting wires |
摘要 |
A method of producing a high-temperature oxide superconducting material, which comprises the steps of (a) preparing a material corresponding to an oxide superconductor of the perovskite type structure consisting essentially of a first member selected from the group consisting yttrium, lanthanoids, thallium and bismuth; at least one alkaline earth metal; copper; and oxygen and (b) heating the material in the presence of an alkali metal selected from the group consisting of potassium, sodium, rubidium and cesium to a temperature around the melting point of the alkali metal or to a higher temperature for a time sufficient to effect grain growth in the superconductor material, thereby to produce the superconductor containing the alkali metal in an amount not larger than 4 mole % based on the first member.
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申请公布号 |
US5508256(A) |
申请公布日期 |
1996.04.16 |
申请号 |
US19940264767 |
申请日期 |
1994.06.23 |
申请人 |
HITACHI, LTD. |
发明人 |
KUMAGAI, TERUO;KANAI, TSUNEYUKI;SOETA, ATSUKO;SUZUKI, TAKAAKI;HIGASHIYAMA, KAZUTOSHI;KAMO, TOMOICHI;MATSUDA, SHINPEI;MAEDA, KUNIHIRO;OKAYAMA, AKIRA;KODAMA, HIDEYO;YOSHINARI, AKIRA;YANAI, YOSHIMI |
分类号 |
C30B11/00;C30B13/00;H01L39/12;H01L39/24;(IPC1-7):H01B12/00 |
主分类号 |
C30B11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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