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Zintl Phase as Thermoelectric Materials: Synthesis, Structure and Properties of Yb5Al2Sb6

Published online by Cambridge University Press:  01 February 2011

Iliya Todorov ,
Duck-Young Chung  and
Mercouri Kanatzidis
Iliya Todorov
Affiliation:
todorov@anl.gov, Argonne National Laboratory, Materials Science Division, 9700 S. Cass Ave., Argonne, IL, 60439, United States
Duck-Young Chung
Affiliation:
dychung@anl.gov, Argonne National Laboratory, Materials Science Division, 9700 S. Cass Ave., Arg onne, IL, 60439, United States
Mercouri Kanatzidis
Affiliation:
m-kanatzidis@northwestern.edu, Northwestern University, Department of Chemistry, 2145 Sheridan Road, Evanston, IL, 60208, United States
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Abstract

We present the synthesis, crystal structure, spectroscopic properties, and electronic structure of a new member of the Zintl family, Yb5Al2Sb6. The compound crystallizes in the Ba5Al2Bi6 structure type. A preliminary assessment of its thermoelectric properties including electrical conductivity, thermopower, and thermal conductivity are reported. Moreover, investigations of solid solutions of this phase, doping effects and chemical modifications will be presented. The room temperature conductivity, thermopower and thermal conductivity of Yb5Al2Sb6/0.5Ge were 1100 S/cm, 20 μV/K, and 3.8 W/m.K, respectively.

Keywords

thermoelectricityalloyelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U06-01
Copyright
Copyright © Materials Research Society 2008

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