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Title: Metal-oxide-based energetic materials and synthesis thereof

Abstract

A method of preparing energetic metal-oxide-based energetic materials using sol-gel chemistry has been invented. The wet chemical sol-gel processing provides an improvement in both safety and performance. Essentially, a metal-oxide oxidizer skeletal structure is prepared from hydrolyzable metals (metal salts or metal alkoxides) with fuel added to the sol prior to gelation or synthesized within the porosity metal-oxide gel matrix. With metal salt precursors a proton scavenger is used to destabilize the sol and induce gelation. With metal alkoxide precursors standard well-known sol-gel hydrolysis and condensation reactions are used. Drying is done by standard sol-gel practices, either by a slow evaporation of the liquid residing within the pores to produce a high density solid nanocomposite, or by supercritical extraction to produce a lower density, high porous nanocomposite. Other ingredients may be added to this basic nanostructure to change physical and chemical properties, which include organic constituents for binders or gas generators during reactions, burn rate modifiers, or spectral emitters.

Inventors:
 [1];  [2];  [3]
  1. (Tracy, CA), Simpson
  2. Livermore, CA
  3. Pleasanton, CA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
908609
Patent Number(s):
6,986,819
Application Number:
10/422,488
Assignee:
The Regents of the University of California (Oakland, CA) OAK
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Tillotson, Thomas M., Randall, L, and Hrubesh, Lawrence W. Metal-oxide-based energetic materials and synthesis thereof. United States: N. p., 2006. Web.
Tillotson, Thomas M., Randall, L, & Hrubesh, Lawrence W. Metal-oxide-based energetic materials and synthesis thereof. United States.
Tillotson, Thomas M., Randall, L, and Hrubesh, Lawrence W. Tue . "Metal-oxide-based energetic materials and synthesis thereof". United States. doi:. https://www.osti.gov/servlets/purl/908609.
@article{osti_908609,
title = {Metal-oxide-based energetic materials and synthesis thereof},
author = {Tillotson, Thomas M. and Randall, L and Hrubesh, Lawrence W},
abstractNote = {A method of preparing energetic metal-oxide-based energetic materials using sol-gel chemistry has been invented. The wet chemical sol-gel processing provides an improvement in both safety and performance. Essentially, a metal-oxide oxidizer skeletal structure is prepared from hydrolyzable metals (metal salts or metal alkoxides) with fuel added to the sol prior to gelation or synthesized within the porosity metal-oxide gel matrix. With metal salt precursors a proton scavenger is used to destabilize the sol and induce gelation. With metal alkoxide precursors standard well-known sol-gel hydrolysis and condensation reactions are used. Drying is done by standard sol-gel practices, either by a slow evaporation of the liquid residing within the pores to produce a high density solid nanocomposite, or by supercritical extraction to produce a lower density, high porous nanocomposite. Other ingredients may be added to this basic nanostructure to change physical and chemical properties, which include organic constituents for binders or gas generators during reactions, burn rate modifiers, or spectral emitters.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 17 00:00:00 EST 2006},
month = {Tue Jan 17 00:00:00 EST 2006}
}

Patent:

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  • A method is described for the solid state synthesis of mixed metal oxide crystalline powders comprising the steps of: preparing a raw material mixture containing at least two different metal cations; adding a template material to said mixture and blending it therewith; initiating formation of a mixed metal oxide by calcination of said mixture and said template material, whereby particles of the mixed metal oxides are formed in powder form; and thereafter recovering said mixed metal oxide particles.
  • An ordered energetic composite structure according to one embodiment includes an ordered array of metal fuel portions; and an oxidizer in gaps located between the metal fuel portions. An ordered energetic composite structure according to another embodiment includes at least one metal fuel portion having an ordered array of nanopores; and an oxidizer in the nanopores. A method for forming an ordered energetic composite structure according to one embodiment includes forming an ordered array of metal fuel portions; and depositing an oxidizer in gaps located between the metal fuel portions. A method for forming an ordered energetic composite structure accordingmore » to another embodiment includes forming an ordered array of nanopores in at least one metal fuel portion; and depositing an oxidizer in the nanopores.« less
  • A product includes: a part including at least one component characterized as an energetic material, where the at least one component is at least partially characterized by physical characteristics of being deposited by an electrophoretic deposition process. A method includes: providing a plurality of particles of an energetic material suspended in a dispersion liquid to an EPD chamber or configuration; applying a voltage difference across a first pair of electrodes to generate a first electric field in the EPD chamber; and depositing at least some of the particles of the energetic material on at least one surface of a substrate,more » the substrate being one of the electrodes or being coupled to one of the electrodes.« less
  • This patent describes an eta phase composition in powder form, prepared in the absence of sulfur or sulfur bearing compounds, the powder having a surface area greater than about 2m{sup 2}/g and the eta phase consisting essentially of X{sub 6}Y{sub 6}Z{sub a}. It comprises carbides, nitrides, or carbonitrides wherein X is at least one element selected from the group consisting of Mo and W, Y is at least one element selected from the group consisting of Fe, Co, Ni, Mo and W, Z is at least one element selected from the group consisting of C, N and combinations thereof suchmore » that when Z is N, a is greater than or equal to 1 but less than or equal to 2 and when Z is C, a is greater than 1 but less than or equal to 2 except when Z is C and Y is Fe, then a is greater than or equal to 1 but less than or equal to 2.« less
  • The present invention generally relates to binary or higher order semiconductor nanoparticles doped with a metallic element, and thermoelectric compositions incorporating such nanoparticles. In one aspect, the present invention provides a thermoelectric composition comprising a plurality of nanoparticles each of which includes an alloy matrix formed of a Group IV element and Group VI element and a metallic dopant distributed within the matrix.