Effect of oxygen activity on chromium segregation in Cr-doped TiO2 single crystal
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Date
2014-08-30
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Springer Nature
Abstract
The present work determined the effect of chromium segregation on surface and near-surface composition of Cr-doped TiO2 (0.05 at.% Cr) after annealing in oxidising and strongly reducing environments at 1,073 and 1,273 K. The segregation-induced depth profiles were determined by secondary ion mass spectrometry (SIMS). It was observed that annealing in oxidising conditions [p(O2) = 105 Pa] and reducing conditions [10−11 Pa > p(O2) > 10−15 Pa] results in an enrichment and depletion of the surface layer in chromium, respectively. The observed effects may be used for tailoring the surface and near-surface composition in order to impose desired properties. © 2015 Springer Nature Switzerland AG.
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Keywords
Oxygen, Chromium, Mass spectroscopy, Monocrystals, Titanium, Annealing
Citation
Jayamaha, U., Atanacio, A. J., Bak, T., Nowotny, J., & Liu, R. (2015). Effect of oxygen activity on chromium segregation in Cr-doped TiO 2 single crystal. Ionics, 21(3), 785-790. doi:10.1007/s11581-014-1226-9