Patent ID: 8491972

Claim:
A method of producing nanopowders of inorganic materials on a metallic basis, encapsulated into a sheath of salt comprising the steps of positioning a substrate having an exposed surface in a closed volume, placing separate crucibles containing ingots of, respectively, an inorganic material component and a salt component in said closed volume, heating the ingots using beam power of electron beams and/or laser beams causing melting and evaporation of said components on vacuum whereby vapor phase flows of the components mix and codeposit on said surface, and controlling the intensities of the vapor phase flows to said surface so that the on the surface has a selected minimum volume fraction of the salt component no less than 0.30, wherein controlling the intensities of the vapor phase flows is performed by one of moving of the substrate in a plane parallel to the melted components in said crucibles in a direction towards one or the other of the crucibles and arranging a screen with holes in a gap between said crucibles and the substrate so that the vapor phase flows through said holes wherein the size of said holes is controllably decreased or increased.