Title :
Evaluation of the micro-phase diagram near the stoichiometric composition of the Bi2Te3-Sb2Te3 alloys
Author :
Hyun, Dow-Bin ; Hwang, Jong-Seung ; Shim, Jae-Dong ; Kolomoets, N.V. ; Oh, Tae-Sung
Author_Institution :
Div. of Metals, Korea Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
Bi2Te3-Sb2Te3 alloys were prepared by the mechanical alloying method and sintered at the temperatures ranging from 50 to 550°C to ensure the phase equilibrium at low temperatures. A micro-phase diagram near the stoichiometric composition was evaluated with the carrier concentration which was estimated from the values of the Seebeck coefficient. Singular properties of the Seebeck coefficient and the electrical resistivity observed at the composition of 20% Bi2Te3-80% Sb 2Te3 were also discussed
Keywords :
Seebeck effect; antimony compounds; bismuth compounds; carrier density; electrical resistivity; mechanical alloying; phase diagrams; phase equilibrium; semiconductor materials; sintering; stoichiometry; 50 to 550 degC; Bi2Te3-Sb2Te3; Seebeck coefficient; carrier concentration; electrical resistivity; low temperature; mechanical alloying; micro-phase diagram; phase equilibrium; sintering; solid solutions; stoichiometric composition; Alloying; Annealing; Bismuth; Crystalline materials; Materials science and technology; Milling; Solids; Tellurium; Temperature; 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.1998.740340
