Enhanced Magnetic Property of MgB2 Wire Using Phenol-Formaldehyde Resin

Title
Enhanced Magnetic Property of MgB2 Wire Using Phenol-Formaldehyde Resin
Author(s)
김동호주진호[주진호]이창민[이창민]황수민[황수민]이승묵[이승묵]강원남[강원남]임준형[임준형]김찬중[김찬중]박영순성기수[성기수]
Keywords
CRITICAL-CURRENT DENSITY; FLUX-PINNING PROPERTIES; SUPERCONDUCTOR; BULKS; CRYSTALLINITY; TEMPERATURE; FIELD
Issue Date
201005
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.20, no.3, pp.1589 - 1592
Abstract
We fabricated carbon (C)-doped MgB2 wires using phenol-formaldehyde resin (PF) as a C source to improve their critical current density ( J(c) ) in a magnetic field. In order to induce homogenous C doping, boron ( B) powders were mixed with PF via liquid mixing technique and then the PF-treated B and Mg powders were mixed. The wires were fabricated by conventional powder-in-tube (PIT) process, followed by heat treatment through an in-situ reaction route. We observed that C was substituted for the B sites in the PF-doped MgB2 and that the actual C content increased with increasing PF content. The doped MgB2 wires exhibited lower critical transition temperature (T-c) and self-field J(c), but superior H-c2 value and better J(c)(B) performance than the undoped sample. The 3 wt% PF sample had the highest J(c) value of 7.77 x 10(3) A/cm(2), which is significantly higher than that of the undoped sample (0.29 x 10(3) A/cm(2)) at 5 K and 6.4 T.
URI
http://hdl.handle.net/YU.REPOSITORY/22490http://dx.doi.org/10.1109/TASC.2010.2040723
ISSN
1051-8223
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이과대학 > 물리학과 > Articles
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