Nuru, ZYKotsedi, LArendse, CJMotaung, DMwakikunga, Bonex WRoro, Kittessa TMaaza, M2016-06-272016-06-272015-10Nuru, Z.Y. Kotsedi, L. Arendse, C.J. Motaung, D. Mwakikunga, B. Roro, K.T. and Maaza, M. 2015. Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems. Vacuum, 120(Part B), 115-1200042-207Xhttp://www.sciencedirect.com/science/article/pii/S0042207X15000445http://hdl.handle.net/10204/8572Copyright: 2015 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Vacuum, 120(Part B), 115-120This contribution reports on the effect of thermal annealing on sputtered Pt–Al(sub2)O(sub3) multilayered selective solar absorber coatings deposited onto stainless steel substrates with a Mo IR reflecting buffer layer. The Pt–Al(sub2)O(sub3) cermet nanocoatings were annealed at different temperatures for different durations in vacuum. The spectral selectivity of the optimised Pt–Al(sub2)O(sub3) was found to be thermally stable up to 900 °C in vacuum for 2 h with solar absorptance of 0.944 and thermal emittance of 0.11. At 1000 °C, its spectral selectivity decreased significantly to 0.892/0.13, which is attributed to the inter-diffusion between the layers, and formation of -Fe(sub3)Mo(sub3)C phase. Annealing the Pt–Al(sub2)O(sub3) nanocoatings for long term showed that the cermet nanocoatings were thermally stable up to 800 °C in vacuum for 24 h having spectral selectivity of 0.938/0.10.enConcentrated solar powerSelective solar absorbersCermetThermal stabilityPlatinumAluminaArticleNuru, Z., Kotsedi, L., Arendse, C., Motaung, D., Mwakikunga, B. W., Roro, K. T., & Maaza, M. (2015). Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems. http://hdl.handle.net/10204/8572Nuru, ZY, L Kotsedi, CJ Arendse, D Motaung, Bonex W Mwakikunga, Kittessa T Roro, and M Maaza "Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems." (2015) http://hdl.handle.net/10204/8572Nuru Z, Kotsedi L, Arendse C, Motaung D, Mwakikunga BW, Roro KT, et al. Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems. 2015; http://hdl.handle.net/10204/8572.TY - Article AU - Nuru, ZY AU - Kotsedi, L AU - Arendse, CJ AU - Motaung, D AU - Mwakikunga, Bonex W AU - Roro, Kittessa T AU - Maaza, M AB - This contribution reports on the effect of thermal annealing on sputtered Pt–Al(sub2)O(sub3) multilayered selective solar absorber coatings deposited onto stainless steel substrates with a Mo IR reflecting buffer layer. The Pt–Al(sub2)O(sub3) cermet nanocoatings were annealed at different temperatures for different durations in vacuum. The spectral selectivity of the optimised Pt–Al(sub2)O(sub3) was found to be thermally stable up to 900 °C in vacuum for 2 h with solar absorptance of 0.944 and thermal emittance of 0.11. At 1000 °C, its spectral selectivity decreased significantly to 0.892/0.13, which is attributed to the inter-diffusion between the layers, and formation of -Fe(sub3)Mo(sub3)C phase. Annealing the Pt–Al(sub2)O(sub3) nanocoatings for long term showed that the cermet nanocoatings were thermally stable up to 800 °C in vacuum for 24 h having spectral selectivity of 0.938/0.10. DA - 2015-10 DB - ResearchSpace DP - CSIR KW - Concentrated solar power KW - Selective solar absorbers KW - Cermet KW - Thermal stability KW - Platinum KW - Alumina LK - https://researchspace.csir.co.za PY - 2015 SM - 0042-207X T1 - Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems TI - Thermal stability of multilayered Pt-Al2O3 nanocoatings for high temperature CSP systems UR - http://hdl.handle.net/10204/8572 ER -