Synthesis of MgB2 at low temperature and autogenous pressure

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.

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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.

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ID Code: 71374
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: magnesium diboride synthesis, sodium borohydride, superconductivity, MgB2 synthesis
DOI: 10.3390/ma7053901
ISSN: 1996-1944
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > MACROMOLECULAR AND MATERIALS CHEMISTRY (030300) > Synthesis of Materials (030306)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Functional Materials (091205)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 please consult author(s).
Copyright Statement: Creative Commons Attribution License.
Deposited On: 18 May 2014 22:32
Last Modified: 20 May 2014 05:32

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