Fabrication method for synthesizing a BixSb2-xTe3 thermoelectric nanocompound and thermoelectric nanocompound thereby

摘要

invention Bi, Sb and Te precursors and the solvent added to the Bi-Sb-Te solution was prepared a step (step 1); To prepare a Bi-Sb-Te hydrate aqueous solution in a mixture of Bi-Sb-Te base solution prepared in the step 1 (step 2); Bi by introducing a reducing agent to the Bi-Sb-Te hydrate prepared in the step 2 through the reduction of liquid phase at room temperature _x Sb _{2 - x} Te ₃ preparing a reaction (step 3); Bi prepared in step 3 _x Sb _{2 - x} Te ₃ reaction (step 4) to aging; And Bi subjected to aging in step 4 _x Sb _{2 - x} Te ₃ The reaction was filtered and dried Bi _x Sb _{2 - x} Te ₃ preparing nanoparticles (step 5); Bi containing the _x Sb _{2 - x} Te _{provides 3} method for producing a nano-compound thermoelectric material (2 0 & ; x & lt). According to the present invention is manufactured through a liquid phase reduction process Bi _x Sb _{2 - x} Te ₃ nano-compound can form nanoparticles with uniform block the growth of the particles by not a separate heat treatment for removing chemical additives. Therefore, Bi _x Sb _{2 - x} Te ₃ particles of nano compounds Depending on the level of 1 to 150 nm formed by a homogeneous size distribution with a Bi _x Sb _2-x Te ₃ the thermal conductivity of the nano-compound to decrease and ultimately improves the thermoelectric figure of merit. ;