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Thermoelectric characteristics of the spark plasma-sintered silicon boride ceramics

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2005, 15(2), pp.75-78
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Kwang Bo Shim 1 Seung Hwan Shim 1 이대웅 1 채재홍 2 jun-ichi Matsushita 3

1한양대학교
2요업기술원
3Tokai Univ.

Accredited

ABSTRACT

Silicon boride (SiB6) is very promising for use as thermoelectric materials at high temperature because of its high melting point and relatively large Seebeck coefficient. In the present work, spark plasma sintering (SPS) was applied for preparing dense SiB6 ceramics, and their thermoelectric properties were investigated, together with their microstructural evaluation. The SPS process was found to be effective in densifying a SiB6 ceramic, typically 99 % of the theoretical density at low temperature of 1500oC. In comparison with SiB6 specimen prepared by hot-pressing, the SPS-processed specimen exhibited the significantly improved Seebeck coefficient, resulting in the higher power factor.

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