The effect of increasing Si content in the absorber layers (CrAlSiNx /CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
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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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 |
repository.mail.fl_str_mv |
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1799132315312455680 |