DocumentCode
2174266
Title
Preparation and thermoelectric properties of grain aligned (Ca,Bi) 3Co4O9 ceramics
Author
Matsubara, I. ; Funahashi, R. ; Takeuchi, T. ; Zhou, Y.
Author_Institution
Nat. Inst. of Adv. Ind. Sci. & Technol., Osaka, Japan
fYear
2001
fDate
2001
Firstpage
172
Lastpage
175
Abstract
Effects of sintering process on the thermoelectric properties of (Ca,Bi)3Co4O9 ceramics have been investigated. We have prepared (Ca, Bi)3Co4O9 bulk materials using the methods of spark plasma sintering (SPS), hot pressing (HP), and a combination of them. Power factors of the SPS and HP samples at 700°C are 4.2×10-4 Wm-1 K-2 and 4.5×10-4 Wm-1 K-2, respectively. The combination of SPS and HP enables bulk ceramics (SPS-HP) to be high density, grain alignment, and low resistivity without any degradation of the thermoelectric power. The power factor and figure of merit of the SPS-HP sample attain to 5.7×10-4 Wm-1 K-2 and ZT=0.29 at 700°C, respectively
Keywords
bismuth compounds; calcium compounds; electrical resistivity; hot pressing; sintering; thermal conductivity; thermoelectric power; (CaBi)3Co4O9; 700 C; ceramics; figure of merit; grain alignment; hot pressing; layered structure; power factor; resistivity; sintering; spark plasma sintering; thermoelectric power; Bismuth; Calcium; Ceramics; Coatings; Conducting materials; Conductivity; Plasma properties; Powders; Reactive power; Thermoelectricity;
fLanguage
English
Publisher
ieee
Conference_Titel
Thermoelectrics, 2001. Proceedings ICT 2001. XX International Conference on
Conference_Location
Beijing
ISSN
1094-2734
Print_ISBN
0-7803-7205-0
Type
conf
DOI
10.1109/ICT.2001.979852
Filename
979852
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