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- W2078462971 abstract "The influence of three different boron powders with two different nominal qualities as starting material for the preparation of MgB 2 tapes on microstructure and superconducting properties was investigated. For the preparation of MgB 2 precursor powder, the technique of mechanical alloying was applied. The reactivity of the precursor powder is highest for B powder with higher nominal purity. The optimum annealing temperature for the formation of MgB 2 phase in the tapes was found to vary because of the different reactivities of precursor boron powders. The j c of 5 × 10 4 A/cm 2 (at 20 K, 3 T) for our tapes is higher than the j c of undoped samples prepared by the conventional in situ technique. Hence, the phase content, the density, and the superconducting properties of MgB 2 tapes depend on the choice of the boron powder." @default.
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- W2078462971 date "2007-09-01" @default.
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- W2078462971 title "MgB2 bulk and tapes prepared by mechanical alloying: Influence of the boron precursor" @default.
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- W2078462971 doi "https://doi.org/10.1016/j.physc.2007.04.109" @default.
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