METHODS OF OBTAINING THE NANOCOMPOSITE FERROMAGNETIC POWDER

摘要

Invention relates to the field of powder metallurgy, in particular, to the methods of obtaining the nanodispersed powders of metals and alloys, and it can be used in chemical industry and materials science for production of nanostructural materials of technical purpose on their basis. Synthesis is proposed, consisting of interaction of salts of metals of iron, cobalt and nickel in the presence of alcohols and tartaric acid, starch precipitated by oxalic acid. The reduction of the powders of oxalates of metals is carried out at a temperature of 380-400 °?? in different reducing atmospheres. Proposed synthesis allows to obtain nanocomposite ferromagnetic powder, which is not pyrophoric, does not light up, is corrosion-resistant, with hydrophilic surface, withstands the heating temperature up to 100 °??, with the size of particles in nanodispersed range. Invention allows to obtain nanostructural ferromagnetic powders with assigned combination of properties achieved simultaneously.