XAS Study of CuAl2O4 Ceramic SystemReport as inadecuate

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Abstract : XAS technique was used to study changes around Cu atom in the CuAl2O4-Al2O3 system, induced by composition variations. The results showed that for compositions with 30 and 43% of CuO, the Cu atoms presents the same surroundmg of Cu in the CuO oxide NCu-O=4, RCu-O=1.96 Å. Samples with 20% doped or undoped showed significative changes in the Cu nearest neighbors number NCu-O=3 and in the mean bond length RCu-O-1.93 Å. The qualitative analysis of the edge region showed that for the 20% of CuO sample, some Cu atoms changes from Cu+2 to Cu+1. This change was more pronounced for the CuO 20% undoped sample.

Author: V. Mastelaro P. Paulin Filho

Source: https://hal.archives-ouvertes.fr/


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