Synthesis and optical characterization of C-SiO 2 and C-NiO sol-gel composite films for use as selective solar absorbers

Autor:	G. Katumba, Gibion Makiwa, L. Olumekor
Rok vydání:	2008
Předmět:	Spin coating Materials science business.industry Composite number Oxide chemistry.chemical_element Solar energy chemistry.chemical_compound Optical coating Optics chemistry Aluminium Optoelectronics Thermal emittance business Sol-gel
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.792654
Popis:	We present a cheaper and environmentally friendly method to fabricate efficient spectrally selective solar absorber materials. The sol-gel technique was used to fabricate carbon-silica (C-SiO2) and carbon-nickel oxide (C-NiO) composite films on aluminium substrates. UV-Vis and FTIR spectrophotometers were used to determine the solar absorptance and thermal emittance of the coatings. C-NiO coatings gave the best spectral characteristics. We show that it is possible to achieve a solar absorptance of 0.94 and a thermal emittance of 0.12. So far, to our knowledge, no commercial spectral solar absorber has these spectral responses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f609c14ed0a03a42598a437a6b972cf7 https://doi.org/10.1117/12.792654 Zobrazit plný text záznamu