Synthesis of nanoscale magnesium diboride powder

Finnemore, D. K.; Marzik, J. V.

doi:10.1088/1757-899X/102/1/012029

Title: Synthesis of nanoscale magnesium diboride powder

Abstract

A procedure has been developed for the preparation of small grained magnesium diboride (MgB₂) powder by reacting nanometer size boron powder in a magnesium vapor. Plasma synthesized boron powder that had particle sizes ranging from 20 to 300nm was mixed with millimeter size chunks of Mg by rolling stoichiometric amounts of the powders in a sealed cylindrical container under nitrogen gas. This mixture then was placed in a niobium reaction vessel, evacuated, and sealed by e-beam welding. The vessel was typically heated to approximately 830°C for several hours. The resulting MgB₂ particles have a grain size in the 200 nm to 800 nm range. Agglomerates of loosely bound particles could be broken up by light grinding in a mortar and pestle. At 830°C, many particles are composed of several grains grown together so that the average particle size is about twice the average grain size. Furthermore, experiments were conducted primarily with undoped boron powder, but carbon-doped boron powder showed very similar results.

Authors:

Finnemore, D. K. ^[1]; Marzik, J. V. ^[2]

Iowa State Univ., Ames, IA (United States)
Specialty Materials Inc., Lowell, MA (United States)

Publication Date:: Fri Dec 18 00:00:00 EST 2015

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1234524

Report Number(s):: IS-J-8745
Journal ID: ISSN 1757-8981

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: IOP Conference Series. Materials Science and Engineering

Additional Journal Information:: Journal Volume: 102; Journal ID: ISSN 1757-8981

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Finnemore, D. K., and Marzik, J. V. Synthesis of nanoscale magnesium diboride powder.  United States: N. p., 2015. 
Web.  doi:10.1088/1757-899X/102/1/012029.

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                    Finnemore, D. K., & Marzik, J. V. Synthesis of nanoscale magnesium diboride powder.  United States.  https://doi.org/10.1088/1757-899X/102/1/012029

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                    Finnemore, D. K., and Marzik, J. V. Fri .  
"Synthesis of nanoscale magnesium diboride powder".  United States.  https://doi.org/10.1088/1757-899X/102/1/012029.  https://www.osti.gov/servlets/purl/1234524.

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@article{osti_1234524,

  title        = {Synthesis of nanoscale magnesium diboride powder},

  author       = {Finnemore, D. K. and Marzik, J. V.},

  abstractNote = {A procedure has been developed for the preparation of small grained magnesium diboride (MgB2) powder by reacting nanometer size boron powder in a magnesium vapor. Plasma synthesized boron powder that had particle sizes ranging from 20 to 300nm was mixed with millimeter size chunks of Mg by rolling stoichiometric amounts of the powders in a sealed cylindrical container under nitrogen gas. This mixture then was placed in a niobium reaction vessel, evacuated, and sealed by e-beam welding. The vessel was typically heated to approximately 830°C for several hours. The resulting MgB2 particles have a grain size in the 200 nm to 800 nm range. Agglomerates of loosely bound particles could be broken up by light grinding in a mortar and pestle. At 830°C, many particles are composed of several grains grown together so that the average particle size is about twice the average grain size. Furthermore, experiments were conducted primarily with undoped boron powder, but carbon-doped boron powder showed very similar results.},

  doi          = {10.1088/1757-899X/102/1/012029},

  journal      = {IOP Conference Series. Materials Science and Engineering},

  number       = ,

  volume       = 102,

  place        = {United States},

  year         = {Fri Dec 18 00:00:00 EST 2015},

  month        = {Fri Dec 18 00:00:00 EST 2015}

}

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Works referenced in this record:

Plasma synthesized doped B powders for MgB2 superconductors
journal, July 2005

Marzik, J. V.; Suplinskas, R. J.; Wilke, R. H. T.
Physica C: Superconductivity and its Applications, Vol. 423, Issue 3-4
DOI: 10.1016/j.physc.2005.04.005

Strongly linked current flow in polycrystalline forms of the superconductor MgB2
journal, March 2001

Larbalestier, D. C.; Cooley, L. D.; Rikel, M. O.
Nature, Vol. 410, Issue 6825
DOI: 10.1038/35065559

Synthesis and optimization of Mg(B1−xCx)2 wire segments
journal, August 2005

Wilke, R. H. T.; Bud’ko, S. L.; Canfield, P. C.
Physica C: Superconductivity, Vol. 424, Issue 1-2
DOI: 10.1016/j.physc.2005.04.016

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Title: Synthesis of nanoscale magnesium diboride powder

Abstract

Citation Formats

Plasma synthesized doped B powders for MgB2 superconductors journal, July 2005

Strongly linked current flow in polycrystalline forms of the superconductor MgB2 journal, March 2001

Synthesis and optimization of Mg(B1−xCx)2 wire segments journal, August 2005

Plasma synthesized doped B powders for MgB2 superconductors
journal, July 2005

Strongly linked current flow in polycrystalline forms of the superconductor MgB2
journal, March 2001

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journal, August 2005