We report the fabrication and characterizations of KCa2Fe4As4F2 round wires for the first time. Polycrystalline KCa2Fe4As4F2 powder was prepared by solid-state reaction. Superconducting wires were fabricated by powder-in-tube (PIT) method followed by hot-isostatic-press (HIP) technique. The self-field J c of the KCa2Fe4As4F2 HIP wires fabricated at 700 and 740°C at a high pressure of 9 MPa for 0.5 h, reached 10 kAcm-2. Although high-pressure sintering at high temperatures enhanced the J c and density of the core of the wires, X-ray diffraction and scanning electron microscopy-energy-dispersive X-ray spectroscopy analyses indicated that impurity phases were present both in the polycrystalline powder and in the core of the wire.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2020 Jul 31|
|Event||32nd International Symposium on Superconductivity, ISS 2019 - Kyoto, Japan|
Duration: 2019 Dec 3 → 2019 Dec 5