12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Pt –Al203 nanocoatings for high temprature concentrated solar thermal power applications

13 Jul 2011, 17:00


Poster Presentation Track A - Condensed Matter Physics and Material Science Poster1


Ms Zebib Yenus Nuru (iThemba LABS)


Nano-pahsed structures based on metal-dielectric composites also called cermets (Ceramic-Metal) are considered among the most effective spectrally selective solar absorbers. For high temperature applications (stable up to 650°C) noble metals nanoparticles and refractory oxide host matrices are ideal as per their high temperature chemical inertness and stability: Pt/Al2O3 cermet nano-composites are a representative family. This contribution reports on the optical properties of Pt/Al2O3 cermet nano-composites deposited in a multilayered tandem structure. The radio-frequency sputtering optimized Pt/Al2O3 solar absorbers consist of stainless steel substrate/ Mo coating layer/ Pt-Al2O3/ protective Al2O3 layer and stainless steel substrate/ Mo coating layer /Pt-Al2O3 for different composition and thickness of the Pt-Al2O3 cermet coatings. The coatings microstructure, morphology, composition, optical properties were analyzed by x-ray diffraction, atomic force microscopy, infrared attenuated total reflection and UV-VI-NIR specular reflectances.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? No
Level (Hons, MSc, <br> &nbsp; PhD, other)? PhD
Consider for a student <br> &nbsp; award (Yes / No)? No

Primary author

Ms Zebib Yenus Nuru (iThemba LABS)


Prof. Arendsen Christopher (University of Western Cape) Prof. Maaza Malik (iThamba labs)

Presentation Materials