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Record Details

Record 18 of 475
Porous cobalt spheres for high temperature gradient magnetically assisted fluidized beds
External Online Source: doi:10.1016/S0025-5408(02)01072-3
Author and Affiliation:
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
Abstract: Porous 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.
Publication Date: Feb 20, 2003
Document ID:
20040087407
(Acquired Sep 07, 2004)
Subject Category: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Document Type: Journal Article
Publication Information: Materials research bulletin (ISSN 0025-5408); Volume 38; 3; 395-407
Publisher Information: United States
Contract/Grant/Task Num: NAG9-1181
Financial Sponsor: NASA Johnson Space Center; Houston TX United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CLOSED ECOLOGICAL SYSTEMS; COBALT; FLUIDIZED BED PROCESSORS; HIGH TEMPERATURE; LIFE SUPPORT SYSTEMS; MAGNETIC PROPERTIES; POROSITY; SPHERES; TEMPERATURE GRADIENTS; FILTRATION; HEAT; OXIDES; SCANNING ELECTRON MICROSCOPY; WEIGHTLESSNESS
Other Descriptors: ALGINATES; COBALT; ECOLOGICAL SYSTEMS, CLOSED; LIFE SUPPORT SYSTEMS/INSTRUMENTATION; MAGNETICS; MICROSPHERES; FILTRATION; HEAT; MICROSCOPY, ELECTRON, SCANNING; OXIDES; POROSITY; SPACE FLIGHT/INSTRUMENTATION; SUPPORT, U.S. GOV'T, NON-P.H.S; WEIGHTLESSNESS; NASA DISCIPLINE LIFE SUPPORT SYSTEMS; NASA PROGRAM ADVANCED HUMAN SUPPORT TECHNOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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