Thermoelectric properties of Mg2Si1-xSnx synthesized by bulk mechanical alloying

Ren Bo Song, Ya Zheng Liu, Tatsuhiko Aizawa

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Bulk mechanical alloying (BMA) has been successfully applied to solid-state synthesis of p-type and n-type thermoelectric materials Mg2Si 1-xSnx (x = 0, 0.2, 0.4, 0.6, 0.8, 1) from element-powders at the room temperature in a relatively short time. The electrical conductivity, the Seebeck coefficient and the thermal conductivity of the Mg2Si1-xSnx are quite sensitive to the x-content. With the x-content rising, the electrical conductivity increases. When x = 0.6, it reaches the lowest and Mg2Si shows an n-type of semi-conducting. However, when x = 0.2 and T > 525 K, the Seebeck coefficient of the samples will change the opposite way. While x≥0.4, the samples present a p-type of semi-conducting. The figure of merit, Z of Mg 2Si1-xSnx will be obtained in the range from 300 K to 700 K. When x = 0.6, Z proves to be higher than that of other samples at 300 K≤T≤650 K.

Original languageEnglish
Pages (from-to)S134-S138
JournalChinese Journal of Aeronautics
Volume19
Issue numberSUPPL.
Publication statusPublished - 2006 Dec

Keywords

  • Bulk mechanical alloying
  • Mg SiSn
  • Solid-state synthesis
  • Thermoelectric

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering

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