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Investigation of Zintl Compounds for Thermoelectric Applications Susan M. Kauzlarich, University of California-Davis, DMR 0600742. Zintl phases with very low thermal conductivity as candidates for Thermoelectric applications.
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Investigation of Zintl Compounds for Thermoelectric Applications Susan M. Kauzlarich, University of California-Davis, DMR 0600742 Zintl phases with very low thermal conductivity as candidates for Thermoelectric applications Yb11MSb9 (M = Ga, In), structure related to Yb14MnSb11,1 has extremely low lattice thermal conductivity. The low thermal conductivity, less than 0.6 W/m K and thermal stability to 1300 K suggest that Yb11MSb9 has the potential for high thermoelectric efficiency at high temperature if charge carrier doping can be controlled.2 New rare-earth phosphide Zintl phases Eu3Ga2P4 and Eu3In2P4 were synthesized. Eu3Ga2P4 is isostructural with Ca3Ga2N4,3 while an isoformular phase Eu3In2P4, is isostructural with Sr3In2P4,4. The thermal diffusivity measurements indicate extremely low thermal conductivity of Eu3Ga2P4 and Eu3In2P4, as low as 0.6 W/m K. The low thermal conductivity makes the compounds particularly interesting since phosphides normally have relatively high thermal conductivity. P Eu Ga/In Eu3Ga2P4 Eu3In2P4 • Brown, Shawna R.; Toberer, Eric S.; Ikeda, Teruyuki; Cox, Catherine A.; Gascoin, Frank; Kauzlarich, Susan M.; Snyder, G. Jeffrey, Chem. Mater. 2008, 20, 3412-3419. • Yi, T.; Cox, C.A.; Toberer, E.S.; Snyder, G.J.; Kauzlarich, S.M., Chem. Mater. 2010, 22, 935-941. • Clarke, S. J.; DiSalvo, F. J., Inorg. Chem. 1997,36 (6), 1143-1148. • Cordier, G.; Schaefer, H.; Stelter, M., Z. Naturforsch., B: Anorg. Chem., Org. Chem. 1986,41B, 1416-19.
Broader ImpactsInvestigation of Zintl Compounds for Thermoelectric Applications Susan M. Kauzlarich, University of California-Davis, DMR 0600742 Graduate students, Tonya Atkins, Jay Roudebush, and Tanghong Yi relaxing in Boston before the solid state chemistry Gordon Research conference. Francisco Ortega- Alvarez is an undergraduate in the MURPPS (Mentorships for Undergraduate research participants in the mathematical and physical sciences) program. He is shown here with graduate student, Catherine Uvarov and high school intern, Jen Karolewski. David Coleman (ACS Project SEED) preparing to centrifuge a tin flux reaction. Graduate student Jason Grebenkemper was his mentor. Undergraduate Joyce Pham presents research at the McNair Scholar Program’s 2010 Symposium held at UC Berkeley. Graduate student Catherine Uvarov shows her support.
