Open AccessFabrication and Characterizations of KCa2Fe4As4F2 Superconducting HIP Wires
Author(s) -
Sunseng Pyon,
Daisuke Miyawaki,
T. Tamegai,
Hideki Kajitani,
N. Koizumi,
Satoshi Awaji,
Hijiri Kitô,
Shigeyuki Ishida,
Yoshiyuki Yoshida
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1590/1/012026
Subject(s) - materials science , crystallite , fabrication , scanning electron microscope , sintering , superconductivity , impurity , hot isostatic pressing , spectroscopy , composite material , analytical chemistry (journal) , metallurgy , condensed matter physics , chemistry , medicine , alternative medicine , physics , organic chemistry , pathology , quantum mechanics , chromatography
We report the fabrication and characterizations of KCa 2 Fe 4 As 4 F 2 round wires for the first time. Polycrystalline KCa 2 Fe 4 As 4 F 2 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 KCa 2 Fe 4 As 4 F 2 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.