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P. Angerer, N Kiss, C Löcker, A Gavrilović, W. Artner, N Godja, G Nauer:
"Titanium oxide layers on aluminium substrates produced by the anodic spark deposition process";
Materials Chemistry and Physics, 128 (2011), 28 - 31.

Titanium oxide layers were prepared on pure aluminium substrates by the anodic spark deposition
method. The formed crystalline titania (TiO2) phases rutile and anatase and the sodium titanium oxide
(Na0.23TiO2) were identified. The corresponding crystallite size values were obtained from X-ray diffraction
data by means of the Rietveld method. The crystallite size of each of these phases continuously
increases with rising current density. Furthermore, the two-dimensional distribution of the titania phases
on the sample surface was determined by Raman spectroscopy. It was found that the rutile/anatase ratio
is inhomogeneous distributed on an observed area of 400×400 m2.

http://dx.doi.org/10.1016/j.matchemphys.2011.03.027