Thermoelectric material and preparation method thereof

A thermoelectric material, cu1-xagxga1-yinyte2 technology, applied in the field of thermoelectric materials and their preparation, can solve problems such as difficulty in maintaining thermal stability, and achieve the effect of improving thermal conductivity
CN110690341AActive Publication Date: 2020-01-14HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2020-01-14

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Abstract

The invention discloses a thermoelectric material of a p-type chalcopyrite structure with a composition of Cu1-xAgxGa1-yInyTe2, and the highest thermoelectric figure of merit ZT of the thermoelectricmaterial is up to 1.64 at 773K, so that the application efficiency of the thermoelectric material in the aspects of waste heat power generation and thermoelectric refrigeration can be greatly improved. Meanwhile, the preparation method of the thermoelectric material also has the advantages of simple and convenient process, easiness in large-scale production, high practicability and the like.
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Description

technical field

[0001] The invention relates to the technical field of energy materials, in particular to a thermoelectric material and a preparation method thereof. Background technique

[0002] Thermoelectric devices can convert heat energy and electric energy into each other, which is characterized by no noise and no pollution, and is very suitable for recycling waste heat. The essence of thermoelectric conversion technology is a technology that utilizes the Seebeck effect (Seebeck) and Peltier effect (Peltier effect) of semiconductor thermoelectric materials to realize direct mutual conversion of thermal energy and electrical energy.

[0003] The thermoelectric figure of merit ZT is a dimensionless parameter used to characterize the thermoelectric conversion efficiency of thermoelectric materials, where Z is called the thermoelectric figure of merit or figure of merit, and T is the temperature:

[0004] ZT=S 2 σT / κ

[0005] In the formula, S is the thermoelectric pote...

Claims

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