Abstract
Effect of laser radiation on surface morphology, elemental composition and the nature of the temperature dependence of resistance of copper oxide ceramic samples obtained under different conditions of heat treatment was investigated. Some of the samples were covered by copper film and exposed to additional heat treatment. It is found that the laser irradiation both in vacuum and in air leads to a change in the surface microstructure and to the loss of oxygen in the samples. Additional heat treatment with subsequent rapid cooling equalizes the oxygen concentration in the areas exposed and not exposed to laser treatment. Layering of the samples with different ratios of copper and oxygen in the layers occurs at high temperatures. Peculiarities of the temperature dependence of resistance, which results from non-homogeneity in the composition and granular structure of the samples, were found.
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Original Russian Text © S.T. Pashayan, A.S. Kuzanyan, 2015, published in Izvestiya NAN Armenii, Fizika, 2015, Vol. 50, No. 2, pp. 248–257.
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Pashayan, S.T., Kuzanyan, A.S. CuO ceramics: Features of the microstructure and of the temperature dependence of resistance. J. Contemp. Phys. 50, 187–194 (2015). https://doi.org/10.3103/S1068337215020139
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DOI: https://doi.org/10.3103/S1068337215020139