Fabrication method for synthesizing a Bi2TeySe3-y thermoelectric nanocompound and thermoelectric nanocompound thereby

摘要

Bi, Te and Se precursors were charged into a solvent to prepare a Bi-Te-Se solution ( step 1); Preparing a hydrate by mixing an aqueous base solution to the Bi-Te-Se solution prepared in the step 1 (step 2); Bi through the reduction of liquid at room temperature by injecting a reducing agent to hydrate prepared in step 2 ₂ Te _y Se _{3 - y} step for preparing a reaction product (step 3); Prepared Bi _{in step 3 2} Te _y Se _{3 -y} stage of aging the reaction (step 4 ); And subjected to aging in step 4 Bi ₂ Te _y Se _3-y and the reaction was filtered and dried Bi ₂ Te _y Se _{3 -y} preparing nanoparticles (step 5); comprising Bi ₂ provides Te _y Se _{3 -y} method (3 0 & ; y & lt) of the nano-compound thermoelectric material. Bi _{produced by the liquid phase reduction process according to the invention 2} Te _y Se _{3 -y} Nano compound not a separate heat treatment for the chemical additive may be formed by removing a uniform nanoparticle prevent the growth of the particles. Therefore, Bi ₂ Te _y Se _{3 -y} particles of nano compounds 1 to 100 nm class size has formed in accordance with a uniform distribution of Bi ₂ Te _y Se _{3 -y} the thermal conductivity of nano-compound to decrease and ultimately improves the thermoelectric figure of merit. ;