Influence of different mixing ratios of Mg and B powder on structural and superconducting properties in MgB2 |
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| Authors: | H Matsuoka Y Watanabe M Maeda T Kawakami Y Kubota |
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| Institution: | aCollege of Science and Technology, Nihon University, Kanda-Surugadai 1-8-14, Chiyoda-ku, Tokyo 101-8308, Japan;bInstitute for Superconducting and Electronic Materials, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia |
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| Abstract: | We fabricated MgB2 bulks by an in situ Mg diffusive reaction method from compacted B and compacted mixtures of Mg and B respectively. All samples were sintered at 1100 °C for 2 h. MgO impurity phase, density, and critical current density (Jc) were found to be dependent of the starting amount of mixing Mg powder. We also found that the MgO formation in MgB2 matrix was not mainly attributed to the starting amount of additional Mg powder for Mg diffusive reaction. This indicates that MgO presented in the starting Mg powder is hardly diffused into compacted B. |
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| Keywords: | MgB2 bulk MgO Mg diffusive reaction method Density |
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