Improvement of Thermoelectric Properties of CuAlO2 by Excess Oxygen Doping in Annealing

Yun Lu; Kazunari Maeda; Katsuhiro Sagara; Liang Hao; Ying Rong Jin

doi:10.4028/www.scientific.net/MSF.750.134

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HomeMaterials Science ForumMaterials Science Forum Vol. 750Improvement of Thermoelectric Properties of CuAlO2...

Improvement of Thermoelectric Properties of CuAlO₂ by Excess Oxygen Doping in Annealing

Abstract:

The reaction behavior of CuAlO₂ during the annealing at high temperatures was investigated. The relationship between thermoelectric properties including electrical resistivity, excess oxygen doping and decomposition of CuAlO₂ was discussed. The evolution of CuAlO₂ compact during the annealing mainly included excess oxygen doping, decomposition of CuAlO₂ into CuAl₂O₄ and CuO and complete decomposition of CuAlO₂ as following pattern : CuAlO₂ → CuAlO_2+x → CuAlO₂+CuO+ CuAl₂O₄ → CuAl₂O₄+CuO. Electrical resistivity of the compacts was decreased with excess oxygen doping, but increased when CuO and CuAl₂O₄ were formed. Thermoelectric performance of the compacts was improved due to the excess oxygen doping.

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Periodical:

Materials Science Forum (Volume 750)

Pages:

134-137

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.750.134

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Online since:

March 2013

Authors:

Yun Lu, Kazunari Maeda, Katsuhiro Sagara, Liang Hao, Ying Rong Jin

Keywords:

Annealing, CuAlO₂, Decomposition, Excess Oxygen Doping, Thermoelectric Property

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