Paper Title:
Thermoelectric Material Design in Pseudo Binary Systems of Mg2Si – Mg2Ge – Mg2Sn on the Powder Metallurgy Route
  Abstract

Fundamental studies on the thermoelectricity have been mainly done in the pseudo binary systems of Mg2Si – Mg2Ge – Mg2Sn. In recent years, their thermoelectricity is revisited because of light-weight, low initial const and short turning back time in addition to high potential in figureof- merit for ZT approaching to unity or more. Conventional melting and solidification, or, normal PM routes fail in precise, wide-range control of chemical composition and microstructure control. New PM route via bulk mechanical alloying is developed to fabricate the solid solution semiconductive materials with Mg2Si1-xGex and Mg2Si1-ySny for 0 < x, y < 1 and to investigate their thermoelectric materials. Since Mg2Si is n-type and both Mg2Ge and Mg2Sn are p-type, pntransition takes place at the specified range of germanium content, x, and tin content, y. Through optimization of chemical composition, solid-solution type thermoelectric semi-conductive materials are designed both for n- and p-type materials. In addition, appropriate doping condition can be searched in the specified range of x and y.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
1553-1556
DOI
10.4028/www.scientific.net/MSF.534-536.1553
Citation
T. Aizawa, R. B. Song, A. Yamamoto, "Thermoelectric Material Design in Pseudo Binary Systems of Mg2Si – Mg2Ge – Mg2Sn on the Powder Metallurgy Route", Materials Science Forum, Vols. 534-536, pp. 1553-1556, 2007
Online since
January 2007
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Price
$32.00
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Authors: Tatsuhiko Aizawa, Ren Bo Song
Abstract:Magnesium base alloys and compounds are attractive for various applications as a functional material. In particular, a series of binary...
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