Influence of Ball-Milled Low Purity Boron Powder on the Superconductivity of MgB2

Authors

X. Xu, University of Wollongong
J. H. Kim, University of WollongongFollow
W. K. Yeoh, University of Wollongong
M. Rindfleisch, Hyper Tech Research Inc, USA
M. Tomsic, Hyper Tech Research Inc, USA
D. I. dos Santos, Sao Paulo State University-Faculdade de Ciencias, Brazil
S. X. Dou, University of WollongongFollow

RIS ID

22534

Publication Details

This article was originally published as Xu, X, Kim, JH, Yeoh, WK, Rindfleisch, M, Tomsic, M, dos Santos, DI and Dou, SX, Influence of Ball-Milled Low Purity Boron Powder on the Superconductivity of MgB2, IEEE Transactions on Applied Superconductivity, 17(2), 2007, 2782-2785. Copyright 2007 IEEE.

Abstract

MgB2 samples were prepared using as-supplied commercial 96% boron with strong crystalline phase and the same 96% boron (B) after ball milling. The effects of the properties of the starting B powder on the superconductivity were evaluated. We observed that samples using ball-milled 96% B, in comparison with the one made from the as-supplied 96% B, were characterized by small grain size, broadened full width at half maximum (FWHM), and enhanced magnetic critical current density ( ). reached 2 103 Acm 2 at 5 K and 8 T. The improved pinning of these samples seems to be caused by enhanced grain boundary pinning at high field.