Composite materials and method of its manufacture

Details Composite materials and method of its manufacture Composite materials and method of its manufacture

2006-01-03

2010-06-22

Silverman, Stanley (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

C423S021100, C423S022000, C423S023000, C423S138000, C423S155000, C502S330000, C502S331000, C502S332000, C502S333000, C502S334000, C502S335000

Reexamination Certificate

active

07740814

ABSTRACT:
A novel solution route has been developed that after heat-treatment to 500-600° C. under inert atmosphere, yields highly porous composites of nano-sized metal (Ni) particle inclusions in ceramics (Al2O3). Metal loadings could be made from <1% to >95% Ni. The metal inclusion sizes in the Ni—Al2O3system with the 10 atom % Ni sample were 4-7 nm, while for the 75 atom % Ni sample they were 5-8 nm. It was shown that the 10 atom % Ni sample could be used as a catalyst for the conversion of CO2and CH4in the temperature range 550-700° C., while higher temperatures led to growth of the Ni particles and carbon poisoning over time. The solution routes could also be deposited as thin dense films containing <10 nm Ni particles. Such films with high Ni-particle loadings deposited on aluminium substrates have shown very good solar heat absorber proficiency and provide good substrates for carbon tube growth.

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Gadenne et al., “Influence of the Deposition Conditions on the optical, electrical and magnetic properties of sputtered FE-Al2O3and Ni- Al2O3nanocermet films,” Mat. Sci and Eng., vol. A168, pp. 257-261 (1993).
Kraus et al., “Synthesis and magnetic properties of Ni- Al2O3thin films,” J. Appl. Phys., vol. 82, No. 3, pp. 1189-1195 (Aug. 1, 1997).

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