Thermoelectric Properties of Hot-Pressed and PECS-Sintered Magnesium-Doped Copper Aluminum Oxide

Authors: Liu, Chang1; Morelli, Donald2

Source: Journal of Electronic Materials, Volume 40, Number 5, May 2011 , pp. 678-681(4)

Publisher: Springer

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Abstract:

Copper aluminum oxide (CuAlO2) is considered as a potential candidate for thermoelectric applications. Partially magnesium-doped CuAlO2 bulk pellets were fabricated using solid-state reactions, hot-pressing, and pulsed electric current sintering (PECS) techniques. X-ray diffraction and scanning electron microscopy were adopted for structural analysis. High-temperature transport property measurements were performed on hot-pressed samples. Electrical conductivity increased with Mg doping before secondary phases became significant, while the Seebeck coefficient displayed the opposite trend. Thermal conductivity was consistently reduced as the Mg concentration increased. Effects of Mg doping, preparation conditions, and future modification on this material’s properties are discussed.

Keywords: CuAlO2; PECS; hot pressing; oxide; thermoelectric

Document Type: Research Article

DOI: http://dx.doi.org/10.1007/s11664-011-1508-1

Affiliations: 1: Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, 48824, USA, Email: liuchan4@msu.edu 2: Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, 48824, USA

Publication date: May 1, 2011

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