Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics

Autores
Prado Gonjal, J.; Lopez, Carlos Alberto; Pinacca, Ruben Miguel; Serrano Sánchez, F.; Nemes, N. M.; Dura, O. J.; Martínez, J. L.; Fernández Díaz, M. T.; Alonso, J. A.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Polycrystalline Sr1−xTi0.9Nb0.1O3−δ (x = 0, 0.1, 0.2) ceramics have been prepared by the solid state method and their structural and thermoelectric properties have been studied by neutron powder diffraction (NPD), thermal, and transport measurements. The structural analysis of Sr1-xTi0.9Nb0.1O3−δ (x = 0.1, 0.2) confirms the presence of a significant amount of oxygen vacancies, associated with the Sr-deficiency of the materials. The analysis of the anisotropic displacement parameters (ADPs) indicates a strong softening of the overall phonon modes for these samples, which is confirmed by the extremely low thermal conductivity value (κ ≈ 1.6 W m-1 K−1 at 823 K) found for Sr1−xTi0.9Nb0.1O3−δ (x = 0.1, 0.2). This approach of introducing A-site cation vacancies for decreasing the thermal conductivity seems more effective than the classical substitution of strontium by rare-earth elements in SrTiO3 and opens a new optimization scheme for the thermoelectric properties of oxides.
Fil: Prado Gonjal, J.. Universidad Complutense de Madrid; España. Instituto de Ciencia de Materiales de Madrid; España
Fil: Lopez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Área Química General e Inorgánica; Argentina
Fil: Pinacca, Ruben Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina
Fil: Serrano Sánchez, F.. Instituto de Ciencia de Materiales de Madrid; España
Fil: Nemes, N. M.. Universidad Complutense de Madrid; España
Fil: Dura, O. J.. Universidad de Castilla-La Mancha; España
Fil: Martínez, J. L.. Instituto de Ciencia de Materiales de Madrid; España
Fil: Fernández Díaz, M. T.. Institut Laue Langevin; Francia
Fil: Alonso, J. A.. Instituto de Ciencia de Materiales de Madrid; España
Materia
ANISOTROPIC DISPLACEMENT PARAMETERS
CERAMICS
NEUTRON DIFFRACTION
OXYGEN VACANCIES
PEROVSKITE
STRONTIUM TITANATE
THERMOELECTRIC MATERIALS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/143845
Acceder
id CONICETDig_7968b7083bf17260b3773014124b310e
oai_identifier_str oai:ri.conicet.gov.ar:11336/143845
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramicsPrado Gonjal, J.Lopez, Carlos AlbertoPinacca, Ruben MiguelSerrano Sánchez, F.Nemes, N. M.Dura, O. J.Martínez, J. L.Fernández Díaz, M. T.Alonso, J. A.ANISOTROPIC DISPLACEMENT PARAMETERSCERAMICSNEUTRON DIFFRACTIONOXYGEN VACANCIESPEROVSKITESTRONTIUM TITANATETHERMOELECTRIC MATERIALShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Polycrystalline Sr1−xTi0.9Nb0.1O3−δ (x = 0, 0.1, 0.2) ceramics have been prepared by the solid state method and their structural and thermoelectric properties have been studied by neutron powder diffraction (NPD), thermal, and transport measurements. The structural analysis of Sr1-xTi0.9Nb0.1O3−δ (x = 0.1, 0.2) confirms the presence of a significant amount of oxygen vacancies, associated with the Sr-deficiency of the materials. The analysis of the anisotropic displacement parameters (ADPs) indicates a strong softening of the overall phonon modes for these samples, which is confirmed by the extremely low thermal conductivity value (κ ≈ 1.6 W m-1 K−1 at 823 K) found for Sr1−xTi0.9Nb0.1O3−δ (x = 0.1, 0.2). This approach of introducing A-site cation vacancies for decreasing the thermal conductivity seems more effective than the classical substitution of strontium by rare-earth elements in SrTiO3 and opens a new optimization scheme for the thermoelectric properties of oxides.Fil: Prado Gonjal, J.. Universidad Complutense de Madrid; España. Instituto de Ciencia de Materiales de Madrid; EspañaFil: Lopez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Área Química General e Inorgánica; ArgentinaFil: Pinacca, Ruben Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; ArgentinaFil: Serrano Sánchez, F.. Instituto de Ciencia de Materiales de Madrid; EspañaFil: Nemes, N. M.. Universidad Complutense de Madrid; EspañaFil: Dura, O. J.. Universidad de Castilla-La Mancha; EspañaFil: Martínez, J. L.. Instituto de Ciencia de Materiales de Madrid; EspañaFil: Fernández Díaz, M. T.. Institut Laue Langevin; FranciaFil: Alonso, J. A.. Instituto de Ciencia de Materiales de Madrid; EspañaMDPI AG2020-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/143845Prado Gonjal, J.; Lopez, Carlos Alberto; Pinacca, Ruben Miguel; Serrano Sánchez, F.; Nemes, N. M.; et al.; Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics; MDPI AG; Crystals; 10; 2; 2-2020; 1-132073-4352CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3390/cryst10020100info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2073-4352/10/2/100info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:02:02Zoai:ri.conicet.gov.ar:11336/143845instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:02:03.189CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
title Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
spellingShingle Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
Prado Gonjal, J.
ANISOTROPIC DISPLACEMENT PARAMETERS
CERAMICS
NEUTRON DIFFRACTION
OXYGEN VACANCIES
PEROVSKITE
STRONTIUM TITANATE
THERMOELECTRIC MATERIALS
title_short Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
title_full Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
title_fullStr Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
title_full_unstemmed Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
title_sort Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics
dc.creator.none.fl_str_mv Prado Gonjal, J.
Lopez, Carlos Alberto
Pinacca, Ruben Miguel
Serrano Sánchez, F.
Nemes, N. M.
Dura, O. J.
Martínez, J. L.
Fernández Díaz, M. T.
Alonso, J. A.
author Prado Gonjal, J.
author_facet Prado Gonjal, J.
Lopez, Carlos Alberto
Pinacca, Ruben Miguel
Serrano Sánchez, F.
Nemes, N. M.
Dura, O. J.
Martínez, J. L.
Fernández Díaz, M. T.
Alonso, J. A.
author_role author
author2 Lopez, Carlos Alberto
Pinacca, Ruben Miguel
Serrano Sánchez, F.
Nemes, N. M.
Dura, O. J.
Martínez, J. L.
Fernández Díaz, M. T.
Alonso, J. A.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ANISOTROPIC DISPLACEMENT PARAMETERS
CERAMICS
NEUTRON DIFFRACTION
OXYGEN VACANCIES
PEROVSKITE
STRONTIUM TITANATE
THERMOELECTRIC MATERIALS
topic ANISOTROPIC DISPLACEMENT PARAMETERS
CERAMICS
NEUTRON DIFFRACTION
OXYGEN VACANCIES
PEROVSKITE
STRONTIUM TITANATE
THERMOELECTRIC MATERIALS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Polycrystalline Sr1−xTi0.9Nb0.1O3−δ (x = 0, 0.1, 0.2) ceramics have been prepared by the solid state method and their structural and thermoelectric properties have been studied by neutron powder diffraction (NPD), thermal, and transport measurements. The structural analysis of Sr1-xTi0.9Nb0.1O3−δ (x = 0.1, 0.2) confirms the presence of a significant amount of oxygen vacancies, associated with the Sr-deficiency of the materials. The analysis of the anisotropic displacement parameters (ADPs) indicates a strong softening of the overall phonon modes for these samples, which is confirmed by the extremely low thermal conductivity value (κ ≈ 1.6 W m-1 K−1 at 823 K) found for Sr1−xTi0.9Nb0.1O3−δ (x = 0.1, 0.2). This approach of introducing A-site cation vacancies for decreasing the thermal conductivity seems more effective than the classical substitution of strontium by rare-earth elements in SrTiO3 and opens a new optimization scheme for the thermoelectric properties of oxides.
Fil: Prado Gonjal, J.. Universidad Complutense de Madrid; España. Instituto de Ciencia de Materiales de Madrid; España
Fil: Lopez, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Área Química General e Inorgánica; Argentina
Fil: Pinacca, Ruben Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Investigaciones en Tecnología Química. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Investigaciones en Tecnología Química; Argentina
Fil: Serrano Sánchez, F.. Instituto de Ciencia de Materiales de Madrid; España
Fil: Nemes, N. M.. Universidad Complutense de Madrid; España
Fil: Dura, O. J.. Universidad de Castilla-La Mancha; España
Fil: Martínez, J. L.. Instituto de Ciencia de Materiales de Madrid; España
Fil: Fernández Díaz, M. T.. Institut Laue Langevin; Francia
Fil: Alonso, J. A.. Instituto de Ciencia de Materiales de Madrid; España
description Polycrystalline Sr1−xTi0.9Nb0.1O3−δ (x = 0, 0.1, 0.2) ceramics have been prepared by the solid state method and their structural and thermoelectric properties have been studied by neutron powder diffraction (NPD), thermal, and transport measurements. The structural analysis of Sr1-xTi0.9Nb0.1O3−δ (x = 0.1, 0.2) confirms the presence of a significant amount of oxygen vacancies, associated with the Sr-deficiency of the materials. The analysis of the anisotropic displacement parameters (ADPs) indicates a strong softening of the overall phonon modes for these samples, which is confirmed by the extremely low thermal conductivity value (κ ≈ 1.6 W m-1 K−1 at 823 K) found for Sr1−xTi0.9Nb0.1O3−δ (x = 0.1, 0.2). This approach of introducing A-site cation vacancies for decreasing the thermal conductivity seems more effective than the classical substitution of strontium by rare-earth elements in SrTiO3 and opens a new optimization scheme for the thermoelectric properties of oxides.
publishDate 2020
dc.date.none.fl_str_mv 2020-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/143845
Prado Gonjal, J.; Lopez, Carlos Alberto; Pinacca, Ruben Miguel; Serrano Sánchez, F.; Nemes, N. M.; et al.; Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics; MDPI AG; Crystals; 10; 2; 2-2020; 1-13
2073-4352
CONICET Digital
CONICET
url http://hdl.handle.net/11336/143845
identifier_str_mv Prado Gonjal, J.; Lopez, Carlos Alberto; Pinacca, Ruben Miguel; Serrano Sánchez, F.; Nemes, N. M.; et al.; Correlation between crystal structure and thermoelectric properties of sr1−xti0.9nb0.1o3−δ ceramics; MDPI AG; Crystals; 10; 2; 2-2020; 1-13
2073-4352
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3390/cryst10020100
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2073-4352/10/2/100
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI AG
publisher.none.fl_str_mv MDPI AG
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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