Synthesis of MgB2 at low temperature and autogenous pressure
Data(s) |
15/05/2014
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Resumo |
High quality, micron-sized interpenetrating grains of MgB2 with high density are produced at low temperatures (~420oC < T < ~500oC) under autogenous pressure by pre-mixing Mg powder and NaBH4 and heating in an Inconel 601 alloy reactor for 5−15 hours. Optimum production of MgB2 with yields greater than 75% occurs for autogenous pressure in the range 1.0 MPa to 2.0 MPa with the reactor at ~500oC. Autogenous pressure is induced by the decomposition of NaBH4 in the presence of Mg and/or other Mg-based compounds. The morphology, transition temperature and magnetic properties of MgB2 are dependent on the heating regime. Significant improvement in physical properties accrues when the reactor temperature is held at 250oC for >20minutes prior to a hold at 500oC. |
Formato |
application/pdf |
Identificador | |
Publicador |
M D P I AG |
Relação |
http://eprints.qut.edu.au/71374/1/Mackinnon_et_al_2014_Materials-07-03901.pdf DOI:10.3390/ma7053901 Mackinnon, Ian D. R., Winnett, Abigail, Alarco, Jose A., & Talbot, Peter C. (2014) Synthesis of MgB2 at low temperature and autogenous pressure. Materials, 7(5), pp. 3901-3918. |
Direitos |
Copyright 2014 please consult author(s). Creative Commons Attribution License. |
Fonte |
School of Chemistry, Physics & Mechanical Engineering; Institute for Future Environments; Science & Engineering Faculty |
Palavras-Chave | #030306 Synthesis of Materials #091205 Functional Materials #magnesium diboride synthesis #sodium borohydride #superconductivity #MgB2 synthesis |
Tipo |
Journal Article |