NDLI: Stress Analysis and Output Power Measurement of an n-Mg$_{2}$Si Thermoelectric Power Generator with an Unconventional Structure

Content Provider	Springer Nature Link
Author	Sakamoto, Tatsuya Iida, Tsutomu Oh, Yota Ishikawa, Masashi Kogo, Yasuo Hirayama, Naomi Arai, Koya Nakamura, Takashi Nishio, Keishi Takanashi, Yoshifumi
Copyright Year	2013
Abstract	We examine the mechanical stability of an unconventional Mg$_{2}$Si thermoelectric generator (TEG) structure. In this structure, the angle θ between the thermoelectric (TE) chips and the heat sink is less than 90°. We examined the tolerance to an external force of various Mg$_{2}$Si TEG structures using a finite-element method (FEM) with the ANSYS code. The output power of the TEGs was also measured. First, for the FEM analysis, the mechanical properties of sintered Mg$_{2}$Si TE chips, such as the bending strength and Young’s modulus, were measured. Then, two-dimensional (2D) TEG models with various values of θ (90°, 75°, 60°, 45°, 30°, 15°, and 0°) were constructed in ANSYS. The x and y axes were defined as being in the horizontal and vertical directions of the substrate, respectively. In the analysis, the maximum tensile stress in the chip when a constant load was applied to the TEG model in the x direction was determined. Based on the analytical results, an appropriate structure was selected and a module fabricated. For the TEG fabrication, eight TE chips, each with dimensions of 3 mm × 3 mm × 10 mm and consisting of Sb-doped n-Mg$_{2}$Si prepared by a plasma-activated sintering process, were assembled such that two chips were connected in parallel, and four pairs of these were connected in series on a footprint of 46 mm × 12 mm. The measured power generation characteristics and temperature distribution with temperature differences between 873 K and 373 K are discussed.
Starting Page	1620
Ending Page	1629
Page Count	10
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	43
Issue Number	6
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2013-10-19
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mg$_{2}$Si thermoelectric generator stress analysis output power evaluation Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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