Highly efficient thermoelectric material

Abstract

A highly efficient thermoelectric material with one end coated in silver adhesive and placed in a high temperature furnace to heat and diffuse the silver adhesive into the homogeneous thermoelectric material, thereby producing an non-uniform thermoelectric material one-side doped thermoelectric material. The non-uniform thermoelectric material one-side doped thermoelectric material is able to achieve a high thermoelectric figure of merit.

Description

technical field [0001] The present invention relates to a high-efficiency thermoelectric material, especially a kind of one end of a thermoelectric material coated with a silver glue, and heated to form a non-uniform thermoelectric substrate, which is a high-efficiency thermoelectric material with a high thermoelectric value. thermoelectric materials. Background technique [0002] Commonly used thermoelectric materials mainly convert heat energy into electrical energy, which is more suitable for refrigeration and temperature difference power generation. However, the bottleneck encountered in the development of thermoelectric technology at present is that the energy conversion efficiency of thermoelectric materials is low, and the thermoelectric conversion efficiency and the thermoelectric performance of materials are relatively low. value (ZT=α 2 T / κρ) is closely related, where α represents the seebeck coefficient, which refers to the voltage that can be generated by mainta...

AI Technical Summary

Problems solved by technology

[0002] Commonly used thermoelectric materials mainly convert heat energy into electrical energy, which is more suitable for refrigeration and temperature difference power generation. However, the bottleneck encountered in the development of thermoelectric technology at present is that the energy conversion efficiency of thermoelectric materials is low, and the thermoelectric conversion efficiency and the thermoelectric performance of materials are relatively low. value (ZT=α 2 T / κρ) is closely related, where α represents the seebeck coefficient, which refers to the voltage that can be generated by maintaining a temperature difference of 1 degree between the two ends of commonly used thermoelectric materials. Therefore, the higher the thermoelectric figure of merit, the better the energy conversion efficiency , but commonly used thermoelectric materials are all homogeneous thermoelectric materials, and it is relatively difficult to obtain a high thermoelectric figure of merit

[0003] In addition, a commonly used thermoelectric component is made of a commonly used thermoelectric material, and a commonly used thermoelectric component generates electric energy through a temperature difference. The lowest temperature end and the highest temperature end, because the temperature of the hot end of the commonly used thermoelectric components is limited by the lower liquefaction temperature of the metal solder joint, and the temperature difference between the cold and hot ends of the commonly used thermoelectric components causes the difference in volume thermal expansion and increases the stress of the solder. It is easy to cause damage to the solder joints and make the components fail, but the temperature difference range cannot be increased, and the efficiency of the components is not easy to optimize

[0004] Therefore, how to improve commonly used thermoelectric materials, so that commonly used thermoelectric materials can obtain a higher thermoelectric figure of merit, and improve the use efficiency of commonly used thermoelectric components is limited by the temperature of the solder, so as to solve the limitation of the solder temperature at the hot end, and Problems with differences in thermal expansion of hot and cold solder terminations

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