fabrication method for La doped AgSbTe2 thermoelectric materials and the thermoelectric materials thereby

摘要

The present invention AgSbTe ₂ for the improvement of thermoelectric performance A thermoelectric material, comprising: a first step of weighing La and Sb in accordance with a composition ratio and charging the same in a vacuum ampoule to melt them; A second step of rapidly cooling the molten raw material to produce an ingot; Crushing the ingot to produce La ₃ Sb ₂ powder; A fourth step of weighing the La ₃ Sb ₂ powder and AgSbTe ₂ to a composition ratio, respectively, charging the molten La ₃ Sb ₂ powder into an ampoule in a vacuum state, and melting the La ₃ Sb ₂ powder; Ag (Sb _1-x La _x ) Te ₂ (0.0015) with La doped AgSbTe ₂ by wire cutting the ingot obtained by quenching the molten raw material or by cutting the ingot and wire cutting after hot press or discharge plasma sintering process ≤ x ≤ 0.0025) to produce La doped AgSbTe ₂ characterized in that it comprises a; Manufacturing method of thermoelectric material and AgSbTe ₂ produced by The thermoelectric material is a technical point. As a result, a small amount of La is stably doped in AgSbTe ₂ to have a low thermal conductivity, a large Seebeck coefficient, and a low specific resistance, thereby improving the performance index, thereby making it an excellent thermoelectric material. Since there is an advantage that can be widely used as a thermoelectric material in the field of thermoelectric power generation and thermoelectric cooling.