The effects of sintering temperature on superconductivity in MgB2/Fe wires

被引：76
作者：
Kim, J. H.
Dou, S. X.
Wang, J. L.
Shi, D. Q.
Xu, X.
Hossain, M. S. A.
Yeoh, W. K.
Choi, S.
Kiyoshi, T.
机构：
[1] Univ Wollongong, Inst Superconduct & Electron Mat, Wollongong, NSW 2522, Australia
[2] Natl Inst Mat Sci, Supercond Mat Ctr, Magnet Dev Grp, Tsukuba, Ibaraki 3050003, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 05期
关键词：
D O I：
10.1088/0953-2048/20/5/007
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied the effects of sintering temperature on the phase transformation, lattice parameters, full width at half-maximum (FWHM), strain, critical temperature (T-c), critical current density (J(c)) and resistivity (rho) inMgB(2)/Fe wires. All samples were fabricated by the in situ powder-in-tube method (PIT) and sintered within a temperature range of 650-900 degrees C. It was observed that wires sintered at low temperature, 650 degrees C, resulted in higher J(c) up to 12 T and lower T-c. The best transport J(c) value reached 4200 A cm(-2) at 4.2 K and 10 T. This is related to the grain boundary pinning due to small grain size. On the other hand, wires sintered at 900 degrees C had a lower J(c) in combination with a higher T-c.
引用
收藏
页码：448 / 451
页数：4
相关论文
共 20 条
  • [1] Phase analysis of superconducting polycrystalline MgB2
    Eyidi, D
    Eibl, O
    Wenzel, T
    Nickel, KG
    Giovannini, M
    Saccone, A
    [J]. MICRON, 2003, 34 (02) : 85 - 96
  • [2] Densification of MgB2 cores in iron-clad tapes
    Fang, H
    Xue, YY
    Zhou, YX
    Baikalov, A
    Salama, K
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (07) : L27 - L29
  • [3] Oxidation of magnesium
    Fournier, V
    Marcus, P
    Olefjord, I
    [J]. SURFACE AND INTERFACE ANALYSIS, 2002, 34 (01) : 494 - 497
  • [4] High transport critical current in MgB2/Fe wire by in situ powder-in-tube process
    Fu, BQ
    Feng, Y
    Yan, G
    Liu, CF
    Zhou, L
    Cao, LZ
    Ruan, KQ
    Li, XG
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 392 : 1035 - 1038
  • [5] Enhancement of critical current densities of powder-in-tube processed MgB2 tapes by using MgH2 as a precursor powder
    Fujii, H
    Togano, K
    Kumakura, H
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2002, 15 (11) : 1571 - 1576
  • [6] Development and performance of thin steel reinforced MgB2 wires and low-temperature in situ processing for further improvements
    Goldacker, W
    Schlachter, SI
    Obst, B
    Liu, B
    Reiner, J
    Zimmer, S
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (05) : S363 - S368
  • [7] Microstructures of MgB2/Fe tapes fabricated by an in situ powder-in-tube method using MgH2 as a precursor powder
    Hata, S
    Yoshidome, T
    Sosiati, H
    Tomokiyo, Y
    Kuwano, N
    Matsumoto, A
    Kitaguchi, H
    Kumakura, H
    [J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2006, 19 (02) : 161 - 168
  • [8] Superconductivity of MgB2 with embedded multiwall carbon nanotube
    Kim, J. H.
    Yeoh, W. K.
    Xu, X.
    Dou, S. X.
    Munroe, P.
    Rindfleisch, M.
    Tomsic, M.
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2006, 449 (02): : 133 - 138
  • [9] Upper critical fields of powder-in-tube-processed MgB2/Fe tape conductors
    Kumakura, H
    Kitaguchi, H
    Matsumoto, A
    Hatakeyama, H
    [J]. APPLIED PHYSICS LETTERS, 2004, 84 (18) : 3669 - 3671
  • [10] Effect of heat-treatment temperatures on density and porosity in MgB2 superconductor
    Liu, CF
    Yan, G
    Du, SJ
    Xi, W
    Feng, Y
    Zhang, PX
    Wu, XZ
    Zhou, L
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 386 : 603 - 606
12