Title:
METAL NANO-POWDER COMPOSITIONS AND METHODS FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO2006089222
Kind Code:
A3
Abstract:
The present invention provides a process for producing metal, metal alloy, and metal composite nano-powders in large volume with a minimum of by-products and process steps. The invention specifically embodies a method comprising providing one or more metal oxide nano-powder(s), mixing the metal oxide nano-powder(s) with an amount of reducing metal or reducing metal precursor to provide an oxide-reducing metal mix; heating the oxide-reducing metal mix in an inert atmosphere to a reducing temperature; followed by washing and drying. The method provides metal nano-powders with average primary particle size of 5 to 500 nm, and a high specific surface area. The invention further comprises unique metal nano-powder compositions of tungsten, zirconium, titanium, and tungsten- hafnium composite that are useful in propellant and explosive formulations. A TEM of a zirconium nano-powder of the invention is illustrated.
Inventors:
CHENG QINGMIN (US)
GIRI ANIT (US)
RAGHUNATHAN SRIKANTH (US)
GIRI ANIT (US)
RAGHUNATHAN SRIKANTH (US)
Application Number:
PCT/US2006/005835
Publication Date:
October 19, 2006
Filing Date:
February 17, 2006
Export Citation:
Assignee:
NANOMAT INC (US)
CHENG QINGMIN (US)
GIRI ANIT (US)
RAGHUNATHAN SRIKANTH (US)
CHENG QINGMIN (US)
GIRI ANIT (US)
RAGHUNATHAN SRIKANTH (US)
International Classes:
B22F9/20; C22C14/00; C22C16/00; C22C27/04
Foreign References:
| US6753353B2 | 2004-06-22 | |||
| US20040211294A1 | 2004-10-28 | |||
| US20040166036A1 | 2004-08-26 | |||
| US5834057A | 1998-11-10 | |||
| US6786951B2 | 2004-09-07 | |||
| US6878184B1 | 2005-04-12 |
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