Explosive and thermic compositions or charges – Structure or arrangement of component or product – Solid particles dispersed in solid solution or matrix
Reexamination Certificate
2006-01-17
2006-01-17
Wu, David W. (Department: 1713)
Explosive and thermic compositions or charges
Structure or arrangement of component or product
Solid particles dispersed in solid solution or matrix
C524S431000, C524S080000
Reexamination Certificate
active
06986818
ABSTRACT:
A synthetic route for producing nanostructure metal-oxide-based materials using sol-gel processing. This procedure employs the use of stable and inexpensive hydrated-metal inorganic salts and environmentally friendly solvents such as water and ethanol. The synthesis involves the dissolution of the metal salt in a solvent followed by the addition of a proton scavenger, which induces gel formation in a timely manner. Both critical point (supercritical extraction) and atmospheric (low temperature evaporation) drying may be employed to produce monolithic aerogels and xerogels, respectively. Using this method synthesis of metal-oxide nanostructured materials have been carried out using inorganic salts, such as of Fe3+, Cr3+, Al3+, Ga3+, In3+, Hf4+, Sn4+, Zr4+, Nb5+, W6+, Pr3+, Er3+, Nd3+, Ce3+, U3+and Y3+. The process is general and nanostructured metal-oxides from the following elements of the periodic table can be made: Groups 2 through 13, part of Group 14 (germanium, tin, lead), part of Group 15 (antimony, bismuth), part of Group 16 (polonium), and the lanthanides and actinides. The sol-gel processing allows for the addition of insoluble materials (e.g., metals or polymers) to the viscous sol, just before gelation, to produce a uniformly distributed nanocomposites upon gelation. As an example, energetic nanocomposites of FexOygel with distributed Al metal are readily made. The compositions are stable, safe, and can be readily ignited to thermitic reaction.
REFERENCES:
patent: 3981979 (1976-09-01), Braithwaite et al.
patent: 5629380 (1997-05-01), Baldwin et al.
patent: 5698483 (1997-12-01), Ong et al.
patent: 5726247 (1998-03-01), Michalczyk et al.
patent: 5788950 (1998-08-01), Imamura et al.
patent: 5855827 (1999-01-01), Bussing et al.
patent: 5962608 (1999-10-01), Ryang et al.
patent: 6270836 (2001-08-01), Holman
patent: 6296678 (2001-10-01), Merzbacher et al.
patent: 6472467 (2002-10-01), Chiao
Gash Alexander
Hrubesh Lawrence W.
Simpson Randall L.
Tillotson Thomas M.
Carnahan L.E.
Hu Henry S.
The Regents of the University of California
Thompson Alan H.
Woolridge John P.
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