STUDY OF THE INFLUENCE OF THE TECHNOLOGY OF RECEIVING THERMOELECTRIC MATERIALS ON THEIR EFFICIENCY

Abstract

The paper presents an overview of the methods of obtaining and synthesizing thermoelectric materials. Both existing for a long time (so-called historical methods) and quite modern methods are considered, as well as their influence on increasing the thermoelectric efficiency of semiconductor materials, which can be used in the future for the production of thermoelectric generators and coolers. The considered methods of synthesis of thermoelectric materials require spending a significant amount of time on obtaining and synthesizing new materials, as they have a significant number of technological processes for the preliminary preparation of materials, their purification and formation. Therefore, an improved method of obtaining semiconductor thermoelectric materials was developed and proposed, which allows with lower energy consumption to effectively control thermoelectric parameters such as: Seebeck coefficient, electrical conductivity, thermal conductivity. A study of the influence of synthesized semiconductor materials using the developed method on the thermoelectric parameters of the technological process, namely the grinding fraction of the synthesized thermoelectric material on the change in the value of the Seebeck coefficient as a function of temperature, was conducted. A study of the effect of pressure force during cold pressing on the Seebeck coefficient as a function of temperature was also carried out, which made it possible to choose effective technological parameters of grinding and pressing to obtain thermoelectric materials with the best efficiency.