METHOD OF PRODUCING FINELY DISPERSED SPHERICAL POWDER CONSISTING OF CERAMIC CORE AND SUCCESSIVELY DEPOSITED LAYER OF SILVER AND PALLADIUM LAYER Russian patent published in 2024 - IPC B22F1/18 B22F9/24 C04B41/90 C23C28/02 

FIELD: powder metallurgy.

SUBSTANCE: invention relates to production of fine powders of precious metals, intended for production of conductor pastes used in electronic industry, in particular in production of multilayer ceramic capacitors for current-conducting elements. Method involves successive reduction of silver and palladium in a reaction solution containing ceramic powder in a dispersant solution, by drop supply of solutions of ammonia complex of silver and reducing agent at temperature of 20–60 °C and then drop supply of solutions of ammonia complex of palladium and reducing agent at temperature of 20–60 °C. Obtained powder is filtered, washed, dried and sieved to obtain a powder with particle size of up to 2 mcm.

EFFECT: improved dispersion characteristics of powder and packing density.

9 cl, 3 dwg, 1 tbl, 5 ex