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Method for producing high-temperature superconductor and molded body made of the same
Method for producing high-temperature superconductor and molded body made of the same
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机译:高温超导体的制造方法和由其制成的成型体
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摘要
A high-temperature superconductor of the composition Bi2(Sr,Ca)3Cu2O8+x having a strontium:calcium ratio of from 5:1 to 2:1 and a value for x of between 0 and 2 is prepared by vigorously mixing the oxides and/or carbonates of bismuth, strontium, calcium and copper in a stoichiometric ratio. The mixture is heated at temperatures of from 870 to 1100 DEG C until a homogeneous melt is formed. The melt is cast in chill moulds and allowed to solidify therein. The castings removed from the moulds are conditioned at 780 to 850 DEG C for from 6 to 30 hours. The conditioned castings are finally treated for 6 hours at a temperature of from 600 to 820 DEG C in an oxygen atmosphere. …??The castings can be converted into mouldings of any desired dimensions by mechanical methods before conditioning. …??The shape and dimensions of the mouldings can also be determined through the shape and dimensions of the mould used in the production of the castings.
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机译:通过剧烈混合氧化物和金属的混合物来制备具有锶:钙比为5∶1至2∶1且x值为0至2的Bi 2(Sr,Ca)3 Cu 2 O 8 + x组成的高温超导体。 /或化学计量比的铋,锶,钙和铜的碳酸盐。将该混合物在870至1100℃的温度下加热直至形成均匀的熔体。将熔体浇铸在冷却模具中并使其在其中固化。从模具中取出的铸件在780至850℃下调理6至30小时。最后,在氧气气氛中,在600至820℃的温度下,将经调节的铸件处理6小时。 ……在修整之前,可以通过机械方法将铸件转变成任何所需尺寸的铸件。 …铸件的形状和尺寸也可以通过铸件生产中所用模具的形状和尺寸来确定。
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