Porous cobalt spheres for high temperature gradient magnetically assisted fluidized beds.
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.
Atwater
James E
JE
UMPQUA Research Company, P.O. Box 609, Myrtle Creek, OR 97457, USA. jatwater@urcmail.net
Akse
James R
JR
Jovanovic
Goran N
GN
Wheeler
Richard R
RR
Sornchamni
Thana
T
D000464:Alginates; D003035:Cobalt; D018504:Ecological Systems, Closed; D005374:Filtration; D006358:Hot Temperature; D008021:Life Support Systems / Q000295:instrumentation*; D008280:Magnetics; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D010087:Oxides; D016062:Porosity; D013026:Space Flight / Q000295:instrumentation; D014893:Weightlessness
D000464:Alginates; D010087:Oxides; D003035:Cobalt; C060728:cobalt oxide