Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders

The thermal decomposition of several metal organic precursors, used in the preparation of YBa2Cu3O7 x superconducting coated conductors (Cu acetate, Cu, Y and Ba trifluoroacetates and Ce propionate) is analyzed by means of several thermoanalytical techniques (TG/DTA, MS and DSC). In all cases, the m...

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Detalhes bibliográficos
Autores: Roura Grabulosa, Pere, Farjas, Jordi, Eloussifi, H., Carreras, Laura, Ricart, Susagna, Puig Molina, Teresa, Obradors, Xavier
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/151743
Acesso em linha:http://hdl.handle.net/10261/151743
Access Level:acceso abierto
Palavra-chave:Pyrolysis
Thermal decomposition
YBCO
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spelling Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powdersRoura Grabulosa, PereFarjas, JordiEloussifi, H.Carreras, LauraRicart, SusagnaPuig Molina, TeresaObradors, XavierPyrolysisThermal decompositionYBCOThe thermal decomposition of several metal organic precursors, used in the preparation of YBa2Cu3O7 x superconducting coated conductors (Cu acetate, Cu, Y and Ba trifluoroacetates and Ce propionate) is analyzed by means of several thermoanalytical techniques (TG/DTA, MS and DSC). In all cases, the metal organic precursors deposited as thin films decompose differently than powders from the same precursors. In thin films, decomposition is facilitated by the easier transport of reactive gas from the surrounding atmosphere and by the easier out-diffusion of volatile products. Consequently, films decompose at lower temperature and are more sensitive to the presence of any residual reactive gas in the furnace. Good thermal contact with the substrate is also shown to minimize overheating in films and avoid combustion processes that are otherwise often observed during the thermal decomposition of powders. Finally, the formation and stability of intermediate products towards the oxide formation, such as metal fluorides, differs in films because of the easier gas exchange. With respect to powders, these compounds are much less stable in films, where their decomposition temperature can be lowered by several hundreds of degrees Celsius. While in some cases the behaviour of films can be predicted by analyzing varying masses of precursor powders, this is not always the case. Therefore, thermal analysis carried out on films is recommended to avoid erroneous conclusions about materials preparation drawn from powders.We acknowledge the financial support from MICINN (MAT2011-28874-C02-01 and -02, Consolider Project NANOSELECT: CSD2007-00041), EU project EUROTAPES, (EUFP7 NMPLA2012280432) and by the Generalitat de Catalunya (Pla de Recerca 2009SGR-185, 2009-SGR-770 and XaRMAE). H. Eloussifi acknowledges financial support from the Tunisian Ministry of Higher Education and Scientific Research. The authors are indebted to Dr. Joan Pere López Olmedo and Dr. Xavier Fontrodona of STR, University of Girona, and Dr. Josep Bassas of CCT, University of Barcelona, for their technical assistance.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)European CommissionGeneralitat de CatalunyaMinistère de l’Enseignement Supérieur et de la Recherche Scientifique (Tunisie)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201720172015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/151743reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.tca.2014.12.016Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1517432026-05-22T06:33:51Z
dc.title.none.fl_str_mv Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
title Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
spellingShingle Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
Roura Grabulosa, Pere
Pyrolysis
Thermal decomposition
YBCO
title_short Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
title_full Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
title_fullStr Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
title_full_unstemmed Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
title_sort Thermal analysis of metal organic precursors for functional oxide preparation: Thin films versus powders
dc.creator.none.fl_str_mv Roura Grabulosa, Pere
Farjas, Jordi
Eloussifi, H.
Carreras, Laura
Ricart, Susagna
Puig Molina, Teresa
Obradors, Xavier
author Roura Grabulosa, Pere
author_facet Roura Grabulosa, Pere
Farjas, Jordi
Eloussifi, H.
Carreras, Laura
Ricart, Susagna
Puig Molina, Teresa
Obradors, Xavier
author_role author
author2 Farjas, Jordi
Eloussifi, H.
Carreras, Laura
Ricart, Susagna
Puig Molina, Teresa
Obradors, Xavier
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
European Commission
Generalitat de Catalunya
Ministère de l’Enseignement Supérieur et de la Recherche Scientifique (Tunisie)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Pyrolysis
Thermal decomposition
YBCO
topic Pyrolysis
Thermal decomposition
YBCO
description The thermal decomposition of several metal organic precursors, used in the preparation of YBa2Cu3O7 x superconducting coated conductors (Cu acetate, Cu, Y and Ba trifluoroacetates and Ce propionate) is analyzed by means of several thermoanalytical techniques (TG/DTA, MS and DSC). In all cases, the metal organic precursors deposited as thin films decompose differently than powders from the same precursors. In thin films, decomposition is facilitated by the easier transport of reactive gas from the surrounding atmosphere and by the easier out-diffusion of volatile products. Consequently, films decompose at lower temperature and are more sensitive to the presence of any residual reactive gas in the furnace. Good thermal contact with the substrate is also shown to minimize overheating in films and avoid combustion processes that are otherwise often observed during the thermal decomposition of powders. Finally, the formation and stability of intermediate products towards the oxide formation, such as metal fluorides, differs in films because of the easier gas exchange. With respect to powders, these compounds are much less stable in films, where their decomposition temperature can be lowered by several hundreds of degrees Celsius. While in some cases the behaviour of films can be predicted by analyzing varying masses of precursor powders, this is not always the case. Therefore, thermal analysis carried out on films is recommended to avoid erroneous conclusions about materials preparation drawn from powders.
publishDate 2015
dc.date.none.fl_str_mv 2015
2017
2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/151743
url http://hdl.handle.net/10261/151743
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.tca.2014.12.016
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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