Method for preparing silver antimony tellurium and silver telluride based on-site composite thermoelectric material

Abstract

The invention discloses a method for preparing silver antimony tellurium and silver telluride based on-site composite thermoelectric material, including the steps: weighing silver, antimony and tellurium according to the formula: Agx Sb2-xTe3-x, wherein x being 086 to 0.95, enveloping the same in a vacuum quartz tube, heating to 1000 to 1100 DEG C for fully fusing, keeping for 600 to 1000 minutes, cooling at the speed of 1 DEG C per minute to 900 DEG C, placing the quartz tube into the liquid nitrogen for quenching, obtaining the castingsolid material, ball milling and crushing, obtaining theblock thermoelectric alloy. The invention has simple process, lower cost, short period and adaptability for mass productuion, the prepared block silver antimony tellurium and silver telluride based on-site composite thermoelectric material has lower thermal conductivity and higher Seebeck coefficient, thus obtaining higher room-temperature thermoelectricalmerit.

Description

technical field

[0001] The invention relates to a preparation method of silver antimony tellurium and silver telluride based in-situ composite thermoelectric material. The invention belongs to the technical field of thermoelectric semiconductor materials. Background technique

[0002] A thermoelectric material is a semiconductor material that directly converts electrical energy and thermal energy through the movement of carriers (electrons or holes). Thermoelectric materials have two related effects in the energy conversion process, one is the Seebeck effect, that is, when there is a temperature difference between the two ends of the thermoelectric material, the thermoelectric material can convert heat energy into electrical energy output, so thermoelectric power generation devices can be used as deep space spacecraft , field operations, marine lighthouses, power sources used by nomadic people, or for industrial waste heat, waste heat power generation; another effect is cal...