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The formation of copper aluminate by solid-state reaction

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Abstract

Solid-state reactions between bulk samples of copper oxide and alumina have been studied using scanning electron microscopy and electron microprobe analysis. Both CuAl2O4 and CuAlO2 were found to form during reactions in air at 1100 °C between CuO powder and single-crystal alumina substrates. The relative position of the CuAl2O4 and CuAlO2 layers was observed to depend on the crystallographic orientation of the surface of the alumina substrate: CuAl2O4 formed in contact with (0001) alumina substrates while CuAlO2 formed when the alumina substrate surface was (11 0). Faceted Cu–aluminate/alumina phase boundaries were observed to develop when single-crystal alumina rods were reacted with CuO, although the interfaces invariably tended to be wavy.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Cornell University, 14853, Ithaca, New York, USA

    David W. Susnitzky & C. Barry Carter

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  1. David W. Susnitzky
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  2. C. Barry Carter
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Susnitzky, D.W., Carter, C.B. The formation of copper aluminate by solid-state reaction. Journal of Materials Research 6, 1958–1963 (1991). https://doi.org/10.1557/JMR.1991.1958

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  • DOI: https://doi.org/10.1557/JMR.1991.1958

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