METHOD OF DETERMINING COMPOSITION OF SOLID SOLUTION Russian patent published in 2016 - IPC G01N23/20 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention can be used for assessment of composition of two-component solid solutions in nanodispersed materials, including, in particular, nano-sized particles: Pt-Ru, Pt-Rh, Fe-Co, Pd-Ru, Pd-Rh, Pd-H, Hf-O. Invention consists in that disclosed method of determining composition of a two-component solid solution involves determining by X-ray structural analysis lattice constant of solid solution and lattice constant of pure solvent with subsequent determination of content of dissolved element based on relationship thereof with lattice constant. For determining composition of solid solution in nanodispersed material a pure solvent is first obtained in a nanostate using a method which was used to obtain said solid solution. Dependence of content of dissolved element in nanodispersed material on lattice constant is established by calculating change of lattice periods x by formula: a₀-a_rast,= x, where a₀ is lattice constant of solvent in a coarse-crystalline state, a_rast is lattice constant of solvent in nanostate, and correcting dependence of content of dissolved element on lattice constant, set for coarse-crystalline materials by value x. To determine content of dissolved element based on established dependence, difference in lattice constants of solid solution and pure solvent Δa is used, which is determined by formula: Δa = a_rast-a_tr, where a_tr is lattice constant of solid solution in nanodispersed material.

EFFECT: technical result is possibility of evaluation of composition of solid solutions in nanodispersed materials.

1 cl, 12 dwg, 1 tbl, 7 ex.