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  • 1. Niska, John
    et al.
    Andersson, Britt M.
    Umeå University, Faculty of Science and Technology, Physics.
    Easterling, Kenneth
    Sundqvist, Bertil
    Umeå University, Faculty of Science and Technology, Physics.
    Loberg, Bengt
    Formation of the 124 phase superconductor (YBa2Cu4O8) by retaining oxygen in a reaction HIP sintering process1990In: Journal of materials science letters, ISSN 0261-8028, E-ISSN 1573-4811, Vol. 9, no 7, p. 770-771Article in journal (Refereed)
    Abstract [en]

    The ceramic superconductor YBa2Cu4O8 has been produced by high temperature sintering of a mixture of CuO and YBa2Cu3O7 in a glass capsule under high hydrostatic argon pressure. The resulting highly dense material is investigated by X-ray diffraction, optical and electron microscopy, resistance measurements and hardness measurements, and shown to be a homogeneous High transition temperature superconductor.

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