Abstract
Carbon nanotubes (CNTs) are an excellent candidate for introducing effectivepinning centres and at the same time enhancing the upper critical field ofMgB2. We report on the use of a low intensity ultrasonication as a methodof dispersion of CNTs into precursor magnesium and boron powder.The ultrasonication improved homogenous mixing of CNTs with theMgB2 matrix. Ultrasonicationof CNT doped MgB2 resulted in a significant enhancement in the field dependence of critical current density. Thedensity of the sample increased due to the improved adherence between CNTs andMgB2 matrix. CNTs donate carbon that is substituted for boron inMgB2.
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