Claims
- 1. A process for the generation of low nanosized particles of one or more metals or the combusted products thereof, comprising:
a) providing a multi-element diffusion flame burner having a plurality of combustible gas passageways and combusting gas passageways arranged in a geometric array defining a substantially planar burner surface, and optionally, one or a plurality of spaced apart precursor supply passageways; b) supplying non-premixed combusting gas to said combusting gas passageways and non-premixed combustible gas to said combustible gas passageways and igniting to form a primary flame; c) introducing a particle precursor into at least one of
(i) said combusting gas, (ii) said combustible gas, or (iii) said precursor supply passageways, and d) recovering a nanosized combusted particle product.
- 2. The process of claim 1, wherein said precursor comprises at least one volatile metal compound of a metal of groups 3 to 7, a transition metal, or an inner transition metal.
- 3. The process of claim 1, wherein said precursor comprises a volatile metal alkyl, metal alkoxide, metal hydride, metal halide, metal salt of an organic carboxylic acid, metal glycolate, metal olefin complex, or a mixed metal compound containing at least one metal and two or more alkyl, alkoxide, hydride, halide, carboxylate, olefin, or glycolate moieties.
- 4. The process of claim 1, wherein said metal comprises silicon, titanium, aluminum, zirconium, gold, silver, platinum, or tin.
- 5. The process of claim 1, wherein said nanosized particles have a mean particle size of less than 50 nm.
- 6. The process of claim 1, wherein said precursor is an organic tin compound and said nanosized particle product comprises one or more of Sn(0), SnO, or SnO2.
- 7. The process of claim 6, wherein said nanosized particle product comprises Sn(0).
- 8. The process of claim 1, wherein at least one of said combusting gas or said combustible gas is diluted with an inert gas.
- 9. An Sn(0) or SnO nanosized particle product, prepared by the process of claim 1.
- 10. The process of claim 1, further comprising
d) altering the flame stoichiometry to vary the oxidation state of said combusted product.
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. provisional application Serial No. 60/396,784, filed Jul. 17, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60396784 |
Jul 2002 |
US |