Thermite compositions for use as gas generants

C - Chemistry – Metallurgy – 06 – D

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C06D 5/06 (2006.01) B60R 21/26 (2006.01) C06B 33/00 (2006.01)

Patent

CA 2167389

A sodium-azide-free gas-generating composition includes an oxidizable inorganic fuel, such as a metal, and an oxidizing agent containing oxygen and a metal. The fuel and the oxidizing agent are selected such that water vapor is produced upon reaction between the inorganic fuel and the oxidizing agent. Although a number of inorganic fuels can be employed, a suitable fuel can be a transition metal, another element such as silicon, boron, aluminum, magnesium, an intermetallic compound, hydrides of these metals and mixtures thereof. The oxidizing agent comprises a metal hydroxide, a metal hydrous oxide, a metal oxide hydrate, a metal oxide hydroxide, or mixtures thereof. The fuel and oxidizing agent are selected such that essentially no gases other than water vapor are produced.

Une composition générant un gaz exempt d'azide de sodium comprend un combustible inorganique oxydable, tel qu'un métal, et un agent d'oxydation contenant de l'oxygène et un métal. Le combustible et l'agent d'oxydation sont sélectionnés de sorte que la vapeur d'eau soit générée lors de la réaction entre le combustible inorganique et l'agent d'oxydation. Bien qu'un certain nombre de combustibles inorganiques peuvent être utilisés, un combustible approprié peut être un métal de transition, un autre élément tel que le silicium, le bore, l'aluminium, le magnésium, un composé intermétallique, des hybrides de ces métaux et des mélanges de ceux-ci. L'agent d'oxydation comprend un hydroxyde métallique, un oxyde hydraté métallique, un hydrate d'oxyde métallique, un hydroxyde d'oxyde métallique ou des mélanges de ceux-ci. Le combustible et l'agent d'oxydation sont sélectionnés de sorte qu'aucun gaz autre que la vapeur d'eau ne soit généré.

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