Metal, alloy, or metal carbide nanoparticles and a process for f

Details Metal, alloy, or metal carbide nanoparticles and a process for f Metal, alloy, or metal carbide nanoparticles and a process for f

1994-06-24

1996-08-27

Nakarani, D. S.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

148105, 148108, 148278, 423448, 428404, 428408, 428698, 428699, B32B 516, B32B 1502

Patent

active

055499732

ABSTRACT:
A metal or alloy nanoparticle is provided which exhibits hysteresis at room temperature having a carbon coating. The nanoparticle has a diameter in the range of approximately 0.5 to 50 nm, and may crystalline or amorphous. The metal, alloy, or metal carbide nanoparticle is formed by preparing graphite rods which are packed with the magnetic metal or alloy. or an oxide of the metal or alloy. The packed graphite rods are subjected to a carbon arc discharge to produce soot containing metal, alloy, or metal carbide nanoparticles and non-magnetic species. The spot is subsequently subjected to a magnetic field gradient to separate the metal, alloy, or metal carbide nanoparticles from the non-magnetic species.

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