Effect of Ho Doping on the High-Temperature Thermoelectric Properties of Ca3Co4O9-Based Oxides

Tao Zhu; Jun Min Zhou

doi:10.4028/www.scientific.net/AMR.228-229.947

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 228-229Effect of Ho Doping on the High-Temperature...

Effect of Ho Doping on the High-Temperature Thermoelectric Properties of Ca₃Co₄O₉-Based Oxides

Abstract:

Ca3-xHoxCo4O9 (x=0.0, 0.15, 0.3, 0.45) samples were prepared using solid reaction and the effect of Ho doping on their high thermoelectric properties were investigated. The substitution of Ho for Ca resulted in an increase of both thermopower and electrical resistivity which could be attributed to the decrease of hole concentrations. The Ho-doped samples had lower thermal conductivity than Ca3Co4O9 due to their lower electronic and lattice thermal conductivity. The largest ZT values were attained in Ca2.7Ho0.3Co4O9 sample.

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Periodical:

Advanced Materials Research (Volumes 228-229)

Pages:

947-950

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.228-229.947

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Online since:

April 2011

Authors:

Tao Zhu, Jun Min Zhou

Keywords:

Ca₃Co₄O_9+δ, Ho Doping, Thermoelectric Properties

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