Bulletin of the Korean Chemical Society

  • 제13권6호
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  • Pages.663-665
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  • 1992
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Synthesis of Superconductor $YBa_{2}Cu_{4}O_{8}$ by Pyrolysis of EDTA Complex

  • 발행 : 1992.12.20
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초록

The superconducting $YBa_2Cu_4O_8$ was synthesized in oxygen condition at 1 atm. The starting material with 1 : 2 : 4 composition was obtained by pyrolysis of EDTA complex, which was converted to 1-2-3 phase during densification, followed by the 1-2-4 phase recovery at $810^{\circ}C$ . The phase presents were identified by XRD, TG, DTA and AC magnetic susceptibility. Our data indicated that considerable amounts of 1-2-4 phase formed but with the 1 : 2 : 3 phase or possibly 2-4-7 as visible. As the P($O_2$) increased with temperature, impurity peak, CuO ($2{\Theta}$ = 38.8), gradually decrease, and we conclude that the 1-2-4 phase is predominant bulk superconductor under the high oxygen pressure.

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참고문헌

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피인용 문헌

  1. ChemInform Abstract: Synthesis of Superconductor YBa2Cu4O8 by Pyrolysis of EDTA Complex. vol.24, pp.18, 1992, https://doi.org/10.1002/chin.199318035