Title :
Thermoelectric properties of the hot-pressed Bi2(Te,Se) 3 alloys with the Bi2Se3 content and addition of scattering center
Author :
Kim, Hang-Chong ; Lee, Sun-Kyung ; Oh, Tae-Sung ; Hyun, Dow-Bin
Author_Institution :
Dept. of Metall. Eng. & Mater. Sci., Hong Ik Univ., Seoul, South Korea
Abstract :
Thermoelectric properties of the hot-pressed Bi2(Te1-xSex)3 alloys, prepared by melting/grinding and mechanical alloying, were investigated with the Bi2Se3 content. Whereas a p-n transition occurred at about 30 mol% Bi2Se3 in Bi2(Te1-xSex)3 single crystals, the hot-pressed specimens exhibited n-type conduction for all compositions of 0⩽x⩽1. Among the hot-pressed specimens, a maximum figure-of-merit of 1.92×10-3/K was obtained with the Bi2(Te0.85Se0.15)3 composition. Thermoelectric properties of the mechanically-alloyed and hot-pressed Bi2(Te0.85Se0.15)3 were also investigated with addition of BN powders as scattering centers
Keywords :
bismuth compounds; boron compounds; ceramics; electrical conductivity transitions; hot pressing; powder technology; semiconductor materials; stoichiometry; thermoelectricity; BN powders; Bi2(Te0.85Se0.15)3; Bi2(Te0.85Se0.15)3 composition; Bi2(Te1-xSex)3 single crystals; Bi2(TeSe)3:BN; Bi2Se3 content; hot-pressed Bi2(Te,Se)3 alloys; hot-pressed Bi2(Te0.85Se0.15) 3; hot-pressed specimens; maximum figure-of-merit; mechanical alloying; melting/grinding; n-type conduction; p-n transition; scattering center; thermoelectric properties; Alloying; Bismuth; Crystals; Electronics cooling; Integrated circuit noise; Mechanical factors; Powders; Scattering; Thermal conductivity; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 1998. Proceedings ICT 98. XVII International Conference on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-4907-5
DOI :
10.1109/ICT.1998.740346
