Year: 2018
Type: article
Abstract: Cu 2 Se exhibits very low thermal conductivity and the origin is known to be the "liquid-like" behavior of Cu ions around the sub-lattice of Se.Due to its very high ZT, research interest in the thermoelectric properties of this material has been increasing rapidly.However, most studies have used a conventional melting process, and, to the best of our knowledge, the melt-spinning process has not yet been employed to fabricate the Cu 2 Se compound.Herein, we report the thermoelectric properties of Cu 1.98 Se compounds prepared by melt-spinning.Depending on the cooling rate, we could control the microstructure of the melt-spun Cu 1.98 Se ribbons successfully.The melt-spun ribbons were consolidated using a hot press, and the thermoelectric properties of the compounds were characterized.Although the electrical conductivity of the compound decreased as compared with the Cu 1.98 Se compound prepared by the conventional method, an increase in Seebeck coefficient led to an improved power factor in the compound prepared by melt-spinning.Furthermore, a reduction in thermal conductivity due to the reduced contribution of electronic to total conductivity resulted in the enhancement of ZT values in the Cu 1.98 Se compound.
Source: 대한금속재료학회지
Authors: Jang-Yeul Tak, Young Soo Lim
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Funder: Pukyong National University
OpenAlex ID: W2828023149