Significant improvement of Jc in MgB2 bulk superconductor using ball-milled high-purity crystalline boron

被引：20

作者：

Zhang, Y. ^{[1
]}

Xu, X. ^{[1
]}

Zhao, Y. ^{[1
]}

Kim, J. H. ^{[1
]}

Lu, C. ^{[2
]}

Zhou, S. H. ^{[1
]}

Dou, S. X. ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 11期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1088/0953-2048/21/11/115004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The particle size, purity and form of the starting boron powders play an important role in the superconducting properties of MgB(2). In this paper high-purity (99.999%) boron powders with crystalline phase that were processed by ball milling have been used as the precursor powders. It was observed that the critical current density (J(c)) valuewas 9.1 x 10(3) A cm(-2) at 5 K and 8 T, which is two times higher than for a sample with ball-milled amorphous boron powders, and a factor of 40 higher than a sample made from as-supplied amorphous boron powders. Significant J(c) improvement at high fields is attributed to the H(c2) enhancement caused by the increased disorder.

引用

页数：6

共 50 条

[31] Effect of the carbon addition to filling powder ball-milled with oils on the critical current density in ex situ processed MgB2 tapes
Fujii, H.
Ozawa, K.
Kitaguchi, H.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2012, 25 (10):
[32] Superconducting screening on different length scales in high-quality bulk MgB2 superconductor
Horvat, J
Soltanian, S
Pan, AV
Wang, XL
JOURNAL OF APPLIED PHYSICS, 2004, 96 (08) : 4342 - 4351
[33] Influence of high-pressure deformation and annealing on the structure and properties of a bulk MgB2 superconductor
M. V. Degtyarev
V. P. Pilyugin
Yu. N. Akshentsev
E. I. Kuznetsova
T. P. Krinitsina
Yu. V. Blinova
S. V. Sudareva
E. P. Romanov
The Physics of Metals and Metallography, 2016, 117 : 772 - 782
[34] Superconducting screening on different length scales in high-quality bulk MgB2 superconductor
Horvat, J., 1600, American Institute of Physics Inc. (96):
[35] Influence of high-pressure deformation and annealing on the structure and properties of a bulk MgB2 superconductor
Degtyarev, M. V.
Pilyugin, V. P.
Akshentsev, Yu. N.
Kuznetsova, E. I.
Krinitsina, T. P.
Blinova, Yu. V.
Sudareva, S. V.
Romanov, E. P.
PHYSICS OF METALS AND METALLOGRAPHY, 2016, 117 (08): : 772 - 782
[36] Effects of SPS pressure on the mechanical properties of high packing ratio bulk MgB2 superconductor
Murakami, A.
Iwamoto, A.
Noudem, J. G.
30TH INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2017), 2018, 1054
[37] In-field Jc improvement by oxygen-free pyrene gas diffusion into highly dense MgB2 superconductor
Maeda, M.
Kim, J. H.
Zhao, Y.
Heo, Y. -U.
Takase, K.
Kubota, Y.
Moriyoshi, C.
Yoshida, F.
Kuroiwa, Y.
Dou, S. X.
JOURNAL OF APPLIED PHYSICS, 2011, 109 (02)
[38] Improvement of high-field Jc of MgB2 wires by polymethyl-methacrylate doping
Park, G. C.
Hwang, S. M.
Lee, C. M.
Choi, J. H.
Joo, J.
Lim, J. H.
Kang, W. N.
Kim, C. -J.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2010, 470 : S1034 - S1035
[39] Neutron detector by using a metallic high-Tc superconductor MgB2
Takahashi, K
Miki, S
Satoh, K
Moriwaki, K
Fukuda, K
Yotsuya, T
Shimakage, H
Wang, Z
Okayasu, S
Katagiri, M
Morii, Y
Hojou, K
Niimura, N
Ishida, T
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 412 : 1597 - 1601
[40] Property studies of MgB2 superconductor directly synthesized using high pressure
Jin, CQ
Li, SC
Yu, RC
Li, FY
Wang, RJ
Zhu, JL
Liu, ZX
Chen, LC
JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (44) : 10771 - 10778

← 1 2 3 4 5 →