Preparation and Thermoelectric Properties of Highly Oriented NaxCo2O4 by Solution Combustion Synthesis Method

Li Hua Zhang; Noriyuki Okinaka; Tsuyoshi Tosho; Tomohiro Akiyama

doi:10.4028/www.scientific.net/AMM.71-78.1213

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Preparation and Thermoelectric Properties of...

Preparation and Thermoelectric Properties of Highly Oriented Na_xCo₂O₄ by Solution Combustion Synthesis Method

Abstract:

Na_xCo₂O₄ (x = 1.4~1.9) ceramics were synthesized by solution combustion synthesis (SCS) method and sintered by spark plasma sintering (SPS) method in this paper. The synthesized bulk samples showed a relatively high orientation degree analyzed by XRD. Thermoelectric properties of the as synthesized bulk samples were investigated in the direction parallel to the press direction of SPS from room temperature to 857 K. Among all the samples, the highest power factor 3.07 ´ 10^-4 W×m^-1×K^-2 was obtained at 817 K when x = 1.6, and the highest ZT value of this sample was 0.064 at 817 K.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

1213-1216

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.1213

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Online since:

July 2011

Authors:

Li Hua Zhang, Noriyuki Okinaka, Tsuyoshi Tosho, Tomohiro Akiyama

Keywords:

Orientation Degree, Solution Combustion Synthesis (SCS), Spark Plasma Sintering (SPS), Thermoelectric

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