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Development of BI-SB-TE Ternary Alloy with Compositionally Graded Structure

Published online by Cambridge University Press:  15 February 2011

A. Yamamoto
Affiliation:
Energy Fundamentals Division, Electrotechnical Laboratory, AIST, MITI, Umezono 1–1–4 Tsukuba Ibaraki 305, Japan, a.yamamoto@etl.go.jp
T. Ohta
Affiliation:
Energy Fundamentals Division, Electrotechnical Laboratory, AIST, MITI, Umezono 1–1–4 Tsukuba Ibaraki 305, Japan, a.yamamoto@etl.go.jp
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Abstract

Compositionally graded p-type Bi-Sb-Te thermoelectric material was synthesized by PIES (Pulverized and Intermixed Elements Sintering) method. The materials consisted of three segmented regions of different alloy composition, i.e. y = 0.8/0.825/0.9 in (Bi2Te3)1−y(Sb2Te3)y system. It was found that the electrical power output of the compositionally graded material was larger than that of the best single composition material when the temperature difference was the designed value.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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