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Effect of Ca Doping on the Thermoelectric Performance of Yb_(14)MnSb_(11)

Cox, Catherine A. and Brown, Shawna R. and Snyder, G. Jeffrey and Kauzlarich, Susan M. (2010) Effect of Ca Doping on the Thermoelectric Performance of Yb_(14)MnSb_(11). Journal of Electronic Materials, 39 (9). pp. 1373-1375. ISSN 0361-5235.

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Complex Zintl phases possess low thermal conductivity and can be easily doped to modify the transport properties. Therefore, these phases have the potential to be good thermoelectric materials by simply controlling carrier concentration. Yb_(14)MnSb_(11) is a Zintl phase that has shown promise as a p-type thermoelectric material for high-temperature power generation. A Sn-flux synthetic route was used to make the new phase, Yb_(13)CaMnSb_(11). The high-temperature thermoelectric properties were measured on polycrystalline hot-pressed pellets and compared with Yb_(14)MnSb_(11). Substitution of the lighter isovalent Ca for Yb should reduce the lattice thermal conductivity by mass disorder scattering, and a noticeable reduction is seen in thermal diffusivity measurements at high temperature. There may also be a carrier concentration effect by employing the more electropositive Ca.

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Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2010 TMS. Received June 26, 2009; accepted February 22, 2010; published online August 13, 2010. We gratefully acknowledge the assistance of Franck Gascoin, Teruyuki Ikeda, and Eric Toberer as well as financial support from NSF DMR060 0742, and the NASA Jet Propulsion Laboratory.
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Issue or Number:9
Record Number:CaltechAUTHORS:20100928-091849747
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20173
Deposited By: Tony Diaz
Deposited On:28 Sep 2010 20:10
Last Modified:03 Mar 2020 13:01

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