Improved superconducting properties in bulk MgB2 prepared by high-energy milling of Mg and B powders

被引：13

作者：

Wu, Y. F.

Lu, Y. F.

Yan, G.

Li, J. S.

Feng, Y.

Tang, H. P.

Chen, S. K.

Xu, H. L.

Li, C. S.

Zhang, P. X.

机构：

[1] NW Inst Nonferrous Met Res, Xian 710016, Shaanxi, Peoples R China

[2] Northwestern Polytech Univ, Xian 710012, Peoples R China

[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450002, Henan, Peoples R China

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2006年 / 19卷 / 11期

关键词：

D O I：

10.1088/0953-2048/19/11/021

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

MgB2 bulks were prepared by high- energy milling of Mg and B powders. The correlations between milling times, microstructure and superconducting properties were investigated in MgB2 bulks. The samples were characterized by x- ray diffraction ( XRD), energy dispersive spectrometry ( EDX) and scanning electron microscopy ( SEM), and the magnetization properties were examined with a superconducting quantum interference device ( SQUID) magnetometer. The investigations showed that high- energy milling is an effective approach for obtaining fine crystalline ( 40 - 100 nm) bulk MgB2 with good grain connectivity and high Jc performance. The critical current density reaches 2.0 x 10(6) A cm(-2) at 15 K and 0.59 T, 5.7 x 10(5) A cm(-2) at 2 T and 3.0 x 10(4) A cm(-2) at 5 T.

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页码：1215 / 1218

页数：4

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