Effects of double filling of La and Ce on thermoelectric properties of Ce{sub m}La{sub n}Fe{sub 1.0}Co{sub 3.0}Sb{sub 12} compounds by spark plasma sintering

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2135887· OSTI ID:20719813

Lu, Q M; Zhang, J X; Zhang, X; Liu, Y Q; Liu, D M; Zhou, M L ^[1]

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1. Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Material Science and Engineering, Beijing University of Technology, Beijing 100022 (China)

Double-filled skutterudite compounds Ce{sub m}La{sub n}FeCo{sub 3}Sb{sub 12} with (m+n)=0.2-0.4 were synthesized by spark plasma sintering using powders of Co, Sb, Fe, and rare-earth Ce and La as starting materials, and the thermoelectric properties were studied in detail. The dominant phases of all the samples are the skutterudite with small amount of Sb as an impurity phase, and the amount of Sb decreases in double-filled compound. The lattice constant is enhanced linearly up to (m+n)=0.30 with increasing filling fraction and then unchanged. The Seebeck coefficient and thermal conductivity of double-filled compounds are generally higher than single-filled samples whatever the filling fraction is. Among all the samples, Ce{sub 0.1}La{sub 0.2}FeCo{sub 3}Sb{sub 12} shows the highest Seebeck coefficient of 150 {mu}V K{sup -1} at 773 K and the lowest thermal conductivity of 1.81 W/mK at 673 K, and the maximum ZT value reaches 0.60 at 773 K due to its lower thermal conductivity.

• OSTI ID: 20719813
• Journal Information: Journal of Applied Physics, Vol. 98, Issue 10; Other Information: DOI: 10.1063/1.2135887; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIMONY
ANTIMONY COMPOUNDS
CERIUM
CERIUM COMPOUNDS
COBALT
COBALT COMPOUNDS
IMPURITIES
IRON
IRON COMPOUNDS
LANTHANUM
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
PLASMA
POWDERS
SEEBECK EFFECT
SINTERING
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
THERMAL CONDUCTIVITY
THERMOELECTRIC PROPERTIES