METHOD OF OBTAINING THERMOELECTRIC MATERIAL Russian patent published in 2014 - IPC H01L35/34 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: method includes mechanical-activation processing in a planetary ball mill of solid solutions, which contain bismuth and antimony tellurides with an addition of a grinding agent and further sintering of obtained powders. Mechanical-activation processing is carried out successively in two stages: first, with centrifugal acceleration of grinding bodies in the interval from 800 to 1000 m/sec² for 10-30 min, then with centrifugal acceleration of the grinding bodies in the interval from 20 to 100 m/sec² for 20-40 min. As the grinding agent used are compounds of a layered structure, selected from the group: MoS₂, MoSe, WS₂, WSe, BN or graphite. The grinding agent is taken in an amount of 0.1-1.5 wt % of weight of the solid solution of bismuth and antimony tellurides. The obtained thermoelectric material consists of particles of the triple solid solutions of bismuth and antimony tellurides with a size from 5 nm to 100 nm, between which from 1 to 10 nm thick layers of a compound, selected from the group: MoS₂, MoSe, WS₂, WSe, BN or graphire, are located.

EFFECT: increase of the thermoelectric figure of merit.

2 cl, 3 dwg