METHOD FOR PRODUCING THERMOELECTRIC MATERIAL OF N-TYPE CONDUCTIVITY BASED ON SOLID SOLUTION GESISB AT X = 0.26-0.36, δ = 0.008-0.01 Russian patent published in 2020 - IPC C22C1/04 B22F3/14 C04B35/65 B22F3/23 B22F3/105 

FIELD: metallurgy.

SUBSTANCE: present invention relates to powder metallurgy, a method of producing thermoelectric material of n-type conductivity based on a ternary solid solution Ge_x-δSi_1-xSb_δ (x=0.26–0.36; δ=0.008–0.01), which can be used in production of medium-temperature thermoelectric renewable energy generators operating in the temperature range of 50–490 °C (223–763 K). Method of producing thermoelectric material of n-type conductivity based on ternary solid solution Ge_x-δSi_1-xSb_δ at x=0.26–0.36, δ=0.008–0.01 includes preparation of initial components from monocrystalline ingots Ge, Si and Sb, preparation of powder mixture by two-stage grinding, which is carried out by preliminary crushing and grinding of ingots Ge, Si and Sb using mill based on vibration screen, and then by pouring ground particles with alcohol and their grinding in an inert atmosphere using a ball mill, sintering-pressing by filling a powder mixture into a graphite mold to produce a compact and subsequent electropulse plasma sintering. Method comprises preparation of initial components from monocrystalline ingots Ge (99.9999 %), Si (99.9999 %) and Sb (99.95 %), which are taken at the following ratio, at. %: Ge 33–36.1, Si 63–66, Sb 0.9–1, grinding of crushed particles of initial components in a ball mill is carried out to produce powder with particle size in range of 0.1–1 mcm, electric pulse sintering is carried out at temperature of 1020–1050 °C and at pressure of 50–70 MPa with rate of heating compact powder 50–300 °C/min.

EFFECT: reduced toxicity of production, increased efficiency and simplified method due to reduction of number of technological operations and their duration.

5 cl, 5 dwg, 1 tbl, 3 ex