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

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