12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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Pt –Al203 nanocoatings for high temprature concentrated solar thermal power applications

Presented by Ms. Zebib Yenus NURU on 13 Jul 2011 from 17:00 to 19:00
Type: Poster Presentation
Session: Poster1
Track: Track A - Condensed Matter Physics and Material Science


<p>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.

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Short Paper



Room: Asteria

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