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    • 3. 发明授权
    • Bi oxide superconductors
    • Bi氧化物超导体
    • US5508252A
    • 1996-04-16
    • US261253
    • 1994-06-14
    • Noburu FukushimaHiromi NiuKen Ando
    • Noburu FukushimaHiromi NiuKen Ando
    • C04B35/45H01L39/12H01B12/00
    • C04B35/4521C04B35/4504C04B35/4525H01L39/126Y10S505/782Y10S505/784
    • A substance which has a Cu--O plane containing crystal structure in its unit cell and which is called a Bi oxide superconductor consisting essentially of Bi, Sr, Ca, Cu, and O. Not only part of Bi but also part of Sr and/or Ca of the Bi oxide superconductor is substituted for Pb and rare earth elements (RE), respectively. The Pb substitution relaxes the structural modulation which is closely related to superconductivity of the Bi oxide superconductor and the RE substitution controls its carrier concentration. Accordingly, superconducting properties such as transition temperature and critical current density can be improved remarkably. In addition, not only oxide superconductors with excellent superconductivity can be prepared in a low oxygen content but also the surface condition of the prepared superconductors is stable.
    • 具有在其单元电池中具有晶体结构的Cu-O平面的物质,其被称为基本上由Bi,Sr,Ca,Cu和O组成的Bi氧化物超导体。不仅Bi的一部分,而且还包括部分Sr和/ 或Bi氧化物超导体的Ca分别代替Pb和稀土元素(RE)。 Pb取代放松了与Bi氧化物超导体的超导性密切相关的结构调制,RE取代控制其载流子浓度。 因此,可以显着提高转变温度和临界电流密度等超导性能。 此外,不仅可以以低氧含量制备具有优异超导性的氧化物超导体,而且制备的超导体的表面状态也是稳定的。