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KMID : 1059519920360060818
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Journal of the Korean Chemical Society
1992 Volume.36 No. 6 p.818 ~ p.823
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High Tc Superconductors LnBa2Cu3O7-δ from 2-Ethylhexanoate Precursors
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Kwon Jung-Ohk
Hong Soon-Bok 0014260
Lee Sung-Uhk
Oh Jung-Sik
Chung Won-Yang
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Abstract
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2-Ethylhexanoate compounds which contained Y, Er, Yb, Ba, and Cu were prepared separately. These metallo-organic compounds were dissolved together in the common solvent and the solution was homogeneous. From these solution, high Tc superconductors YBa2Cu3O7-δ(Y123), ErBa2Cu3O7-δ(Er123), and YbBa2Cu3O7-δ(Yb123) were prepared. XRD analysis showed that these superconductors were not single phase and contained some impurity phases including YBa2Cu4O8(Y124). This was also confirmed from the magnetic susceptibility measurement. Generally, critical temperatures were higher than that of the superconductors prepared by ceramic method. Volume diamagnetic susceptibility showed little variation compared to the specimen made by ceramic method.
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