The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability

Detalhes bibliográficos
Autor(a) principal: Al-Rjoub, A.
Data de Publicação: 2019
Outros Autores: Rebouta, L., Costa, Pedro Miguel Pinto, Cunha, N. F., Lanceros-Méndez, S., Barradas, N. P., Alves, E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/61322
Resumo: In this work, the effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability are studied. The two optical stacks presented consist of four magnetron sputtered layers on stainless steel substrates. In both cases, tungsten is used as back-reflector, CrAlSixN/CrAlSiOyNx as absorber layers with different Si/(Cr+Al+Si) atomic ratio (0.15 and 0.30, respectively) and finally the SiAlOx antireflection layer. The structures were theoretically designed by SCOUT software depended on experimental transmittance (T) and reflectance (R) of thin single layers deposited on glass substrates. It is observed that optical stack coatings with higher silicon content show better selectivity values, high solar absorptance, α= 95.9%, and low emissivity, ε= 9.7 % (calculated for 400 ºC), with higher thermal stability at 600 ºC in vacuum, for 650 h. Additionally, with the annealing at 600 ºC an increase of surface roughness was found, which was smaller for sample with higher Si content.
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spelling The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stabilityOptical propertiesSelective absorptionEmissivitySolar absorptanceEngenharia e Tecnologia::Engenharia dos MateriaisScience & TechnologyIn this work, the effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability are studied. The two optical stacks presented consist of four magnetron sputtered layers on stainless steel substrates. In both cases, tungsten is used as back-reflector, CrAlSixN/CrAlSiOyNx as absorber layers with different Si/(Cr+Al+Si) atomic ratio (0.15 and 0.30, respectively) and finally the SiAlOx antireflection layer. The structures were theoretically designed by SCOUT software depended on experimental transmittance (T) and reflectance (R) of thin single layers deposited on glass substrates. It is observed that optical stack coatings with higher silicon content show better selectivity values, high solar absorptance, α= 95.9%, and low emissivity, ε= 9.7 % (calculated for 400 ºC), with higher thermal stability at 600 ºC in vacuum, for 650 h. Additionally, with the annealing at 600 ºC an increase of surface roughness was found, which was smaller for sample with higher Si content.The authors acknowledge the support of FCT in the framework of the Strategic Funding UID/FIS/04650/2013 and the financial support of FCT, POCI and PORL operational programs through the project POCI-01-0145-FEDER-016907 (PTDC/CTM-ENE/2892/2014), co-financed by European community fund FEDER.Elsevier B.V.Universidade do MinhoAl-Rjoub, A.Rebouta, L.Costa, Pedro Miguel PintoCunha, N. F.Lanceros-Méndez, S.Barradas, N. P.Alves, E.2019-03-202019-03-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/61322engApplied Surface Science 481 (2019) 1096-11020169-43320169-433210.1016/j.apsusc.2019.03.208www.elsevier.com/locate/apsuscinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:03:28Zoai:repositorium.sdum.uminho.pt:1822/61322Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:53:36.086103Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
title The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
spellingShingle The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
Al-Rjoub, A.
Optical properties
Selective absorption
Emissivity
Solar absorptance
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
title_short The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
title_full The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
title_fullStr The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
title_full_unstemmed The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
title_sort The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
author Al-Rjoub, A.
author_facet Al-Rjoub, A.
Rebouta, L.
Costa, Pedro Miguel Pinto
Cunha, N. F.
Lanceros-Méndez, S.
Barradas, N. P.
Alves, E.
author_role author
author2 Rebouta, L.
Costa, Pedro Miguel Pinto
Cunha, N. F.
Lanceros-Méndez, S.
Barradas, N. P.
Alves, E.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Al-Rjoub, A.
Rebouta, L.
Costa, Pedro Miguel Pinto
Cunha, N. F.
Lanceros-Méndez, S.
Barradas, N. P.
Alves, E.
dc.subject.por.fl_str_mv Optical properties
Selective absorption
Emissivity
Solar absorptance
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
topic Optical properties
Selective absorption
Emissivity
Solar absorptance
Engenharia e Tecnologia::Engenharia dos Materiais
Science & Technology
description In this work, the effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability are studied. The two optical stacks presented consist of four magnetron sputtered layers on stainless steel substrates. In both cases, tungsten is used as back-reflector, CrAlSixN/CrAlSiOyNx as absorber layers with different Si/(Cr+Al+Si) atomic ratio (0.15 and 0.30, respectively) and finally the SiAlOx antireflection layer. The structures were theoretically designed by SCOUT software depended on experimental transmittance (T) and reflectance (R) of thin single layers deposited on glass substrates. It is observed that optical stack coatings with higher silicon content show better selectivity values, high solar absorptance, α= 95.9%, and low emissivity, ε= 9.7 % (calculated for 400 ºC), with higher thermal stability at 600 ºC in vacuum, for 650 h. Additionally, with the annealing at 600 ºC an increase of surface roughness was found, which was smaller for sample with higher Si content.
publishDate 2019
dc.date.none.fl_str_mv 2019-03-20
2019-03-20T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/61322
url http://hdl.handle.net/1822/61322
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Applied Surface Science 481 (2019) 1096-1102
0169-4332
0169-4332
10.1016/j.apsusc.2019.03.208
www.elsevier.com/locate/apsusc
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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