Abstract
The anodic growth conditions of titania with a tubular structure are investigated. We propose a mechanism of anodic growth of tubular titania, which presupposes that electrochemical oxidation of titanium is predominantly confined to the bottom of pores in a barrier layer, i.e., where the anodic current density is higher, which causes a temperature rise in these regions. As the barrier layer temperature exceeds a certain threshold, the structure of growing oxide changes from the commonly obtained porous honeycomb-like structure to a tubular one. The proposed mechanism is supported by experimental results.
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ACKNOWLEDGMENTS
We are grateful to Dr. Sci. (Phys.–Math.), prof. V. E. Borisenko for fruitful discussions, critical comments, and his active support of the present study.
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Translated by A. Kukharuk
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Lazarouk, S.K., Kupreeva, O.V., Tsirkunov, D.A. et al. Mechanism of Anodic Growth of Tubular Titania. Tech. Phys. 65, 715–722 (2020). https://doi.org/10.1134/S1063784220050138
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DOI: https://doi.org/10.1134/S1063784220050138