Abstract
Copper aluminum oxide (CuAlO2) with delafossite structure is a promising candidate for high temperature thermoelectric applications because of its modest band gap, high stability and low cost. We investigate magnesium doping on the aluminum site as a means of producing higher electrical conductivity and optimized Seebeck coefficient. Powder samples were synthesized using solid-state reaction and bulk samples were prepared using both cold-pressing and hot-pressing techniques. Composition analysis, microstructural examination and transport property measurements were performed, and the results suggest that while hot-pressing can achieve high density samples, secondary phases tend to form and lower the performance of the materials.
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Liu, C., Ren, F., Wang, H. et al. Solid-State Synthesis and Some Properties of Magnesium-Doped Copper Aluminum Oxides. MRS Online Proceedings Library 1218, 105 (2009). https://doi.org/10.1557/PROC-1218-Z01-05
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DOI: https://doi.org/10.1557/PROC-1218-Z01-05