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Research Team Achieves a Thermoelectric Power Factor Approximately Twice that of Conventional Materials Using Manganese Silicide-Based Thermoelectric Materials
-Expecting Effective Utilization of Unused Heat Energy from 300 to 700°C-

December 1, 2016
New Energy and Industrial Technology Development Organization (NEDO)
Tohoku University

As part of a NEDO project, a Tohoku University research group has attained a thermoelectric power factor, an indicator representing the power generation potential of a material, of 2.4mW/K2m using manganese silicide-based thermoelectric materials. This power factor rating is approximately twice that reported for the material MnSi1.7, and manganese silicide thermoelectric materials are expected to be low in cost and have excellent thermal and chemical stability. Moreover, the power factor of lead telluride-based materials, which is a representative thermoelectric material operating in the same temperature range, is approximately 2.0- 2.5mW/K2m at 300- 600°C, similar in performance to the material developed through this research.

This result will make possible to realize a high output power thermoelectric module that generates electric power from unused heat energy of 300 to 700°C such as exhaust heat from automobile engines and waste heat from industrial furnaces in the industrial field.

Image: The appearance of the newly developed thermoelectric material
  • chart
    Chart: The thermoelectric power factor of the newly developed
    (Mn0.97-yV0.03Fey)Si1.74 samples

For more information, please contact:

NEDO Energy Conservation Technology Department
Contact Persons: Nagai, Kusunose Tel: +81-44-520-5281­

National University Corporation Tohoku University, Graduate School of Engineering
Contact Person: Professor Yuzuru Miyazaki, Department of Applied Physics
Tel: +81-22-795-7970­ E-mail:miya@crystal.apph.tohoku.ac.jp
Division of Public Relations
Tel/Fax: +81-22-795-5898­ E-mail:eng-pr@eng.tohoku.ac.jp