TITLE

Improved current densities in MgB2 by liquid-assisted sintering

AUTHOR(S)
Chen, S. K.; Lockman, Z.; Wei, M.; Glowacki, B. A.; MacManus-Driscoll, J. L.
PUB. DATE
June 2005
SOURCE
Applied Physics Letters;6/13/2005, Vol. 86 Issue 24, p242501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Polycrystalline MgB2 samples with GaN additions were prepared by reaction of Mg, B, and GaN powders. The presence of Ga leads to a low melting eutectic phase which allowed liquid phase sintering and produces platelike grains. For low-level GaN additions (<=5 at. %), the critical transition temperature, Tc, remained unchanged and in 1 T magnetic field, the critical current density, Jc was enhanced by a factor of 2 and 10, for temperatures of ∼5 K and 20 K, respectively. The values obtained are approaching those of hot isostatically pressed samples.
ACCESSION #
17452724

 

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