単体金属混合粉を用い作製したn型(Bi_2Te_3)_<0.95>(Bi_2Se_3)_<0.05>熱電材料の微細構造及び熱電特性

概要

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The n-type (Bi_2Te_3)_<0.95>(Bi_2Se_3)_<0.05> was synthesized by modifified pulberized and intermixed sintering elements (PIES) method and its figure of merit was evaluated to be 1.8×10^<-3>/K(25°C). the milling mechanism obeyed to the Kick's law and Tanaka's equation. No anisotro;y of electrical transport phenomena in thermoelectric properties was observed, because the microstructure consisted of non-oriented grains due to use the milling powders of Bi, Te, and Se as starting materias. Thermal conductivity was smaller than that of single crystal by the large phonon scattering due to small grain, and Seebeck coefficient and resistivity were smaller than that of single crystal due to imcompletely formate solid solution and oxides of sintered body.
社団法人日本セラミックス協会の論文
1995-09-01