Coating processes – Particles – flakes – or granules coated or encapsulated
Patent
1996-06-28
1998-11-10
Beck, Shrive
Coating processes
Particles, flakes, or granules coated or encapsulated
4273772, 4273762, 264 11, B05D 700, B05D 302
Patent
active
058340572
ABSTRACT:
Nanoparticles of a mixed oxide precursor are reduced to form particles of a anostructured metastable alloy having a majority metal and a minority metal. Additional heating enriches the surfaces of the particles with respect to the minority metal, thus forming a coating on the particle core. This coating has a higher atomic ratio of minority to majority metal than found in the precursor. The nanostructured metastable alloys may then be oxidized to form nanoparticles having a coating of the oxide of the minority metal and a core of the majority metal or an oxide of the majority metal. The majority metal may be, for example, copper. The minority metal may be, for example, cobalt.
REFERENCES:
patent: 5352269 (1994-10-01), McCandlish et al.
patent: 5456986 (1995-10-01), Majetich et al.
patent: 5468427 (1995-11-01), Stangle et al.
patent: 5470373 (1995-11-01), Edelstein et al.
patent: 5639318 (1997-06-01), Edelstein et al.
Edelstein Alan S.
Harris Vincent G.
Beck Shrive
Chen Bret
Edelberg Barry
McDonnel Thomas
The United States is represented by the Secretary of the Navy
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