Improving flux pinning of MgB2 by carbon nanotube doping and ultrasonication

Carbon nanotubes (CNTs) are an excellent candidate for introducing effective pinning centres and at the same time enhancing the upper critical field of MgB2. We report on the use of a low intensity ultrasonication as a method of dispersion of CNTs into precursor magnesium and boron powder. The ultra...

Full description

Saved in:
Bibliographic Details
Published inSuperconductor science & technology Vol. 19; no. 2; pp. L5 - L8
Main Authors Yeoh, W K, Kim, J H, Horvat, J, Dou, S X, Munroe, P
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2006
Online AccessGet full text

Cover

More Information
Summary:Carbon nanotubes (CNTs) are an excellent candidate for introducing effective pinning centres and at the same time enhancing the upper critical field of MgB2. We report on the use of a low intensity ultrasonication as a method of dispersion of CNTs into precursor magnesium and boron powder. The ultrasonication improved homogenous mixing of CNTs with the MgB2 matrix. Ultrasonication of CNT doped MgB2 resulted in a significant enhancement in the field dependence of critical current density. The density of the sample increased due to the improved adherence between CNTs and MgB2 matrix. CNTs donate carbon that is substituted for boron in MgB2.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/19/2/L01