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Porous cobalt spheres for high temperature gradient magnetically assisted fluidized bedsPorous metallic cobalt spheres have been prepared as high temperature capable media for employment in gradient magnetically assisted fluidization and filtration technologies. Cobalt impregnated alginate beads are first formed by extrusion of an aqueous suspension of Co3O4 into a Co(II) chloride solution. The organic polymer is thermally decomposed yielding cobalt oxide spheres, followed by reduction to the metallic state, and densification. Cobalt beads have been produced with porosities ranging between 10 and 50%, depending upon sintering conditions. The product media have been characterized by scanning electron microscopy (SEM), nitrogen adsorption porosimetry, and vibrating sample magnetometry. c2003 Elsevier Science Ltd. All rights reserved.
Document ID
20040087407
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Atwater, James E.
(UMPQUA Research Company P.O. Box 609, Myrtle Creek, OR 97457, United States)
Akse, James R.
Jovanovic, Goran N.
Wheeler, Richard R Jr
Sornchamni, Thana
Date Acquired
August 21, 2013
Publication Date
February 20, 2003
Publication Information
Publication: Materials research bulletin
Volume: 38
Issue: 3
ISSN: 0025-5408
Subject Category
Man/System Technology And Life Support
Funding Number(s)
CONTRACT_GRANT: NAG9-1181
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Support Systems
NASA Program Advanced Human Support Technology
Non-NASA Center

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