Lanthanum hexaboride for solar energy applications

Abstract We investigate the optical properties of LaB6 – based materials, as possible candidates for solid absorbers in Concentrating Solar Power (CSP) systems. Bulk LaB6 materials were thermally consolidated by hot pressing starting from commercial powders. To assess the solar absorbance and spectr...

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Autores principales:	Elisa Sani, Luca Mercatelli, Marco Meucci, Luca Zoli, Diletta Sciti
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1d3d330f83844178a19cd6646e60088c
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spelling	oai:doaj.org-article:1d3d330f83844178a19cd6646e60088c2021-12-02T11:52:30ZLanthanum hexaboride for solar energy applications10.1038/s41598-017-00749-w2045-2322https://doaj.org/article/1d3d330f83844178a19cd6646e60088c2017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00749-whttps://doaj.org/toc/2045-2322Abstract We investigate the optical properties of LaB6 – based materials, as possible candidates for solid absorbers in Concentrating Solar Power (CSP) systems. Bulk LaB6 materials were thermally consolidated by hot pressing starting from commercial powders. To assess the solar absorbance and spectral selectivity properties, room-temperature hemispherical reflectance spectra were measured from the ultraviolet to the mid-infrared, considering different compositions, porosities and surface roughnesses. Thermal emittance at around 1100 K has been measured. Experimental results showed that LaB6 can have a solar absorbance comparable to that of the most advanced solar absorber material in actual plants such as Silicon Carbide, with a higher spectral selectivity. Moreover, LaB6 has also the appealing characteristics to be a thermionic material, so that it could act at the same time both as direct high-temperature solar absorber and as electron source, significantly reducing system complexity in future concentrating solar thermionic systems and bringing a real innovation in this field.Elisa SaniLuca MercatelliMarco MeucciLuca ZoliDiletta ScitiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Elisa Sani Luca Mercatelli Marco Meucci Luca Zoli Diletta Sciti Lanthanum hexaboride for solar energy applications
description	Abstract We investigate the optical properties of LaB6 – based materials, as possible candidates for solid absorbers in Concentrating Solar Power (CSP) systems. Bulk LaB6 materials were thermally consolidated by hot pressing starting from commercial powders. To assess the solar absorbance and spectral selectivity properties, room-temperature hemispherical reflectance spectra were measured from the ultraviolet to the mid-infrared, considering different compositions, porosities and surface roughnesses. Thermal emittance at around 1100 K has been measured. Experimental results showed that LaB6 can have a solar absorbance comparable to that of the most advanced solar absorber material in actual plants such as Silicon Carbide, with a higher spectral selectivity. Moreover, LaB6 has also the appealing characteristics to be a thermionic material, so that it could act at the same time both as direct high-temperature solar absorber and as electron source, significantly reducing system complexity in future concentrating solar thermionic systems and bringing a real innovation in this field.
format	article
author	Elisa Sani Luca Mercatelli Marco Meucci Luca Zoli Diletta Sciti
author_facet	Elisa Sani Luca Mercatelli Marco Meucci Luca Zoli Diletta Sciti
author_sort	Elisa Sani
title	Lanthanum hexaboride for solar energy applications
title_short	Lanthanum hexaboride for solar energy applications
title_full	Lanthanum hexaboride for solar energy applications
title_fullStr	Lanthanum hexaboride for solar energy applications
title_full_unstemmed	Lanthanum hexaboride for solar energy applications
title_sort	lanthanum hexaboride for solar energy applications
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1d3d330f83844178a19cd6646e60088c
work_keys_str_mv	AT elisasani lanthanumhexaborideforsolarenergyapplications AT lucamercatelli lanthanumhexaborideforsolarenergyapplications AT marcomeucci lanthanumhexaborideforsolarenergyapplications AT lucazoli lanthanumhexaborideforsolarenergyapplications AT dilettasciti lanthanumhexaborideforsolarenergyapplications
_version_	1718395033529352192

Lanthanum hexaboride for solar energy applications

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