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Related Experiment Videos

Porous cobalt spheres for high temperature gradient magnetically assisted fluidized beds.

James E Atwater1, James R Akse, Goran N Jovanovic

  • 1UMPQUA Research Company, P.O. Box 609, Myrtle Creek, OR 97457, USA. jatwater@urcmail.net

Materials Research Bulletin
|February 27, 2004
PubMed
Summary

Researchers created porous metallic cobalt spheres for high-temperature magnetic fluidization and filtration. These cobalt spheres offer tunable porosity for advanced material applications.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Magnetism

Background:

  • Development of advanced materials for high-temperature applications is crucial.
  • Magnetic fluidization and filtration technologies require robust media.
  • Porous metallic cobalt spheres offer unique magnetic and physical properties.

Purpose of the Study:

  • To synthesize porous metallic cobalt spheres.
  • To evaluate their suitability for high-temperature magnetic fluidization and filtration.
  • To control porosity through optimized processing.

Main Methods:

  • Preparation of cobalt-impregnated alginate beads.
  • Thermal decomposition of polymer to cobalt oxide spheres.
  • Reduction to metallic cobalt and densification.
Keywords:
NASA Discipline Life Support SystemsNASA Program Advanced Human Support TechnologyNon-NASA Center

Related Experiment Videos

  • Characterization using SEM, nitrogen adsorption, and VSM.

    • Main Results:

    • Successfully synthesized porous metallic cobalt spheres.
    • Achieved tunable porosity (10-50%) by adjusting sintering conditions.
    • Demonstrated magnetic properties suitable for the intended applications.

    Conclusions:

    • Porous metallic cobalt spheres are viable high-temperature media.
    • The synthesis method allows for controlled porosity.
    • These spheres show promise for gradient magnetically assisted fluidization and filtration.