MANUFACTURING METHOD OF COMPOSITE THERMOELEMENT BRANCH Russian patent published in 2017 - IPC H01L35/34 H01L35/26 

FIELD: electricity.

SUBSTANCE: separate segments of low-, medium- and high-temperature thermoelectric materials are formed and connected together. The low-temperature segments of the branch of n- and p- conductivity type are formed from two sections by the method of spark plasma sintering. Tellurides of bismuth and selenium of Bi₂Te_2.7Se_0.3 and Bi₂Te_2.85Se_0.15 compounds are used as materials for n-type sections. Tellurides of bismuth and stibium of Bi_0.4Sb_1.6Te₃ and Bi_0.27Sb_1.3Te₃ compounds obtained by hot extrusion are used as materials for p-type sections. The combination of low-temperature sections of n- and p-type is carried out in a graphite mould in a spark plasma sintering unit in a vacuum of ~0.1 Pa with an increase in temperature from room temperature to 400-450°C for 1 minute with holding at this temperature for 5-10 minutes at a pressure of 0.5 MPa and then cooling to room temperature at a speed of 3°C/min.

EFFECT: increased efficiency of the thermoelement.

3 cl, 1 tbl