Method for enhancement of thermoelectric efficiency by the preparation of nano thermoelectric powder with core-shell structure
A core-shell structure and nano-powder technology, applied in the manufacture/processing of thermoelectric devices, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as increasing ZT value
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[0034] The present invention provides nano thermoelectric powder with a core-shell structure, which includes a coating on the surface of the nano powder, and by preparing the nano thermoelectric powder with the core-shell structure, the present invention can provide a thermoelectric element with enhanced thermoelectric efficiency.
[0035] The efficiency of a thermoelectric material can be defined by the following equation expressing the dimensionless ZT value.
[0036] ZT=S 2 σT / κ(S: Seebeck coefficient, σ: electrical conductivity, κ: thermal conductivity)
[0037] The ZT value is directly proportional to electrical conductivity and Seebeck coefficient, and inversely proportional to thermal conductivity.
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