Method for the preparation of finely divided metal particles

Details Method for the preparation of finely divided metal particles Method for the preparation of finely divided metal particles

1987-10-29

1989-07-04

Silverman, Stanley

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05C, 75 05R, 75 65EB, 427 531, B22F 900

Patent

active

048447366

ABSTRACT:
A compound of a metallic element, e.g., tetramethyl lead, trimethyl bismuth, etc. in a vapor phase can be efficiently decomposed in a chain reaction of a very large apparent quantum yield to form extremely finely divided high-purity particles of the metallic element by the irradiation with actinic rays, e.g., laser beams, when the concentration of the metallic compound in the vapor phase is at least 1.times.10.sup.15 molecules per cm.sup.3 and the energy density of the actinic rays is at least 1.times.10.sup.-3 Joule per cm.sup.2.

REFERENCES:
patent: 4472513 (1984-09-01), Menges-Hammond
patent: 4474604 (1984-10-01), Nakamura et al.
patent: 4482375 (1984-11-01), Sastry et al.
patent: 4571331 (1986-02-01), Endou et al.
patent: 4619691 (1986-10-01), Araya et al.

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