Thermoelectric properties of spark plasma sintered Ca{sub 2.75}Gd{sub 0.25}Co{sub 4}O{sub 9} ceramics

Journal Article · Sun Jul 01 00:00:00 EDT 2001 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1378056· OSTI ID:40204394

Matsubara, Ichiro; Funahashi, Ryoji; Takeuchi, Tomonari; Sodeoka, Satoshi

Spark plasma sintering (SPS) was applied for preparing dense Ca{sub 2.75}Gd{sub 0.25}Co{sub 4}O{sub 9} ceramics, and their thermoelectric properties were investigated from room temperature to 700{degree}C in air. The SPS process was effective in obtaining dense Ca{sub 2.75}Gd{sub 0.25}Co{sub 4}O{sub 9} ceramics, typically 98% of the theoretical x-ray density, with lower resistivity, without any degradation of the thermoelectric power. The power factor and figure of merit of the spark plasma sintered samples attain 4.8{times}10{sup {minus}4}Wm{sup {minus}1}K{sup {minus}2} and ZT=0.23 at 700{degree}C, respectively. {copyright} 2001 American Institute of Physics.

• Sponsoring Organization: (US)
• OSTI ID: 40204394
• Journal Information: Journal of Applied Physics, Vol. 90, Issue 1; Other Information: DOI: 10.1063/1.1378056; Othernumber: JAPIAU000090000001000462000001; 003114JAP; PBD: 1 Jul 2001; ISSN 0021-8979
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
CERAMICS
PHYSICS
PLASMA
SINTERING
THERMOELECTRIC PROPERTIES