Oxidation Resistant Copper
Patent, Filed 24 Aug 95, patented 17 Jun 97
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
Oxidation resistant particles composed of copper and at least one metal having a valence of 2 or 3 and having an intermediate lattice energy for the metal in its hydroxide form. The metal is selected from nickel, cobalt, iron, manganese, cadmium, zinc, tin, magnesium, calcium and chromium. In one embodiment, the phases of copper and at least one metal in the particles are separate and the concentration of the metal is greater near the surface of the particles than inwardly thereof. Process for making the oxidation resistant copper particles includes the steps of dissolving a copper salt and a salt of at least one of the metals in a suitable solvent or diluent forming primary particles of copper and at least one metal in basic form by mixing a base and the salt solution separating, washing and drying the primary particles reducing the primary particles to metallic form and heat treating the particles in metallic form at an elevated temperature.
- Inorganic Chemistry
- Physical Chemistry