Economical Route to Produce High Seebeck Coefficient Calcium Cobaltate for Bulk Thermoelectric Applications

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1551-2916.2011.04819.x· OSTI ID:1045843

Selig, Jiri ^[1]; Lin, Sidney ^[1]; Lin, Hua-Tay ^[2]; Johnson, D Ray ^[2]; Wang, Hsin ^[2]

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1. Lamar University
2. ORNL

Phase pure calcium cobaltate (Ca1.24Co1.62O3.86) was prepared by Self-propagating High-temperature Synthesis (SHS) followed by a short post heat treatment. Prepared powders were characterized by XRD for phase purity, and SEM for particle size and distribution. Temperature histories at the center and on the surface of reaction pellet during the SHS process were monitored and recorded. Particles size of synthesized powders was reduced using a planetary mill to increase its specific surface area. Electrical conductivity, thermal conductivity and Seebeck coefficient of the prepared power were measured and figure of merit was reported.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Temperature Materials Lab. (HTML)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1045843
• Journal Information: Journal of the American Ceramic Society, Vol. 94, Issue 10; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM
DISTRIBUTION
ELECTRIC CONDUCTIVITY
HEAT TREATMENTS
PARTICLE SIZE
PELLETS
PERFORMANCE
SPECIFIC SURFACE AREA
SYNTHESIS
THERMAL CONDUCTIVITY
X-RAY DIFFRACTION