1 Department of Mechanical Engineering, Technical University of Denmark2 Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark3 Department of Photonics Engineering, Technical University of Denmark4 Optical Microsensors and Micromaterials, Department of Photonics Engineering, Technical University of Denmark5 Danish Technological Institute6 Centre for oil and gas – DTU, Center, Technical University of Denmark7 Danish Technological Institute
Optical properties of anodized aluminium alloys were determined by optical diffuse reflectance spectroscopy of such films. Samples with different concentrations of dopants were excited with a white-light source combined with an integrating sphere for fast determination of diffuse reflectance. The UV-VIS reflectance of Ti-doped anodized aluminium films was measured over the wavelength range of 200 nm to 900 nm. Titanium doped-anodized aluminium films with 5-15 wt% Ti were characterized. Changes in the diffuse light scattering of doped anodized aluminium films, and thus optical appearance, with doping are discussed. Using the Kubelka-Munk model on the diffuse reflectance spectra of such films, the bandgap Eg of the oxide alloys can be determined.
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8th International Conference on Photon-Excited Processes and Apllication (IPECA 2012)