Thermoelectric Properties of Bi2Te3–PbTe Pseudo Binary Near the Eutectic Composition
Abstract:(Bi2Te3)1–x (PbTe) x binary systems near eutectic composition were prepared by melting of elemental metals and a sequential water quenching process and their microstructures and thermoelectric properties were investigated. Multiple phases such as Bi2Te3, BiPbTe and PbTe were observed due to phase separation when the composition x was higher than the eutectic point. Also the electrical conduction type of the alloys converted from p-type to n-type in the phase separated alloys. The lattice thermal conductivities in the phase-separated alloys are lower than those in alloys without phase separation, attributable to increased boundary scattering.
Document Type: Research Article
Publication date: April 1, 2012
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