Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films

[EN] In this work, calcium-modified lead titanate (Pb1-xCa x)TiO3 (PCT) precursor solutions with different amounts of Ca2+ substituting Pb2+ (x = 0.24 and 0.50) have been prepared for the first time by an entirely aqueous solution-gel route. The use of water as a nonhazardous and inexpensive solvent...

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Autores: Bretos, Íñigo, Jiménez, Ricardo, Calzada, M. L., Van Bael, Marlies K., Hardy, A., Van Genechten, D., Mullens, J.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2006
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/345986
Acceso en línea:http://hdl.handle.net/10261/345986
Access Level:acceso abierto
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spelling Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin filmsBretos, ÍñigoJiménez, RicardoCalzada, M. L.Van Bael, Marlies K.Hardy, A.Van Genechten, D.Mullens, J.[EN] In this work, calcium-modified lead titanate (Pb1-xCa x)TiO3 (PCT) precursor solutions with different amounts of Ca2+ substituting Pb2+ (x = 0.24 and 0.50) have been prepared for the first time by an entirely aqueous solution-gel route. The use of water as a nonhazardous and inexpensive solvent, together with the easy handling of the technique (no inert atmosphere is required), are the major advantages of this method. A stable citrato-peroxo complex of Ti(IV) was synthesized first and subsequently combined with the Pb2+ and Ca 2+ reagents (citrates) in the desired molar ratio to obtain the aqueous precursor solutions. The stability of these solutions with time is slightly influenced by the amount of Ca2+ introduced in the PCT system. Gels were obtained from these solutions and subjected to thermogravimetric analysis coupled on-line to Fourier transform infrared (TGA-FTIR) and mass spectroscopy (TGA-MS) techniques. To prepare thin films, we had to improve the hydrophilicity of the Pt/TiOx/SiO2/Si substrates and hence their wetting by the aqueous solutions using a wet chemical treatment of cleaning. Crystallization of the films was carried out by rapid thermal processing (RTP) in air at 650 °C. Films with a single perovskite phase and a homogeneous microstructure were thus obtained, as deduced by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The ability of this solution method to obtain PCT films with ferroelectric and dielectric responses is also demonstrated in the present work. © 2006 American Chemical Society.This work has been supported by the Spanish Project CICyT MAT2004-02014. I. Bretos thanks to the Spanish MEC for his PhD FPI grant aAmerican Chemical SocietyComisión Interministerial de Ciencia y Tecnología, CICYT (España)Ministerio de Educación y Ciencia (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420062024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/345986reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/CYCYT//MAT2004-02014https://doi.org/10.1021/cm061767eSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3459862026-05-22T06:33:51Z
dc.title.none.fl_str_mv Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
title Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
spellingShingle Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
Bretos, Íñigo
title_short Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
title_full Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
title_fullStr Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
title_full_unstemmed Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
title_sort Entirely aqueous solution-gel route for the preparation of (Pb 1-xCax)TiO3 thin films
dc.creator.none.fl_str_mv Bretos, Íñigo
Jiménez, Ricardo
Calzada, M. L.
Van Bael, Marlies K.
Hardy, A.
Van Genechten, D.
Mullens, J.
author Bretos, Íñigo
author_facet Bretos, Íñigo
Jiménez, Ricardo
Calzada, M. L.
Van Bael, Marlies K.
Hardy, A.
Van Genechten, D.
Mullens, J.
author_role author
author2 Jiménez, Ricardo
Calzada, M. L.
Van Bael, Marlies K.
Hardy, A.
Van Genechten, D.
Mullens, J.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Ministerio de Educación y Ciencia (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description [EN] In this work, calcium-modified lead titanate (Pb1-xCa x)TiO3 (PCT) precursor solutions with different amounts of Ca2+ substituting Pb2+ (x = 0.24 and 0.50) have been prepared for the first time by an entirely aqueous solution-gel route. The use of water as a nonhazardous and inexpensive solvent, together with the easy handling of the technique (no inert atmosphere is required), are the major advantages of this method. A stable citrato-peroxo complex of Ti(IV) was synthesized first and subsequently combined with the Pb2+ and Ca 2+ reagents (citrates) in the desired molar ratio to obtain the aqueous precursor solutions. The stability of these solutions with time is slightly influenced by the amount of Ca2+ introduced in the PCT system. Gels were obtained from these solutions and subjected to thermogravimetric analysis coupled on-line to Fourier transform infrared (TGA-FTIR) and mass spectroscopy (TGA-MS) techniques. To prepare thin films, we had to improve the hydrophilicity of the Pt/TiOx/SiO2/Si substrates and hence their wetting by the aqueous solutions using a wet chemical treatment of cleaning. Crystallization of the films was carried out by rapid thermal processing (RTP) in air at 650 °C. Films with a single perovskite phase and a homogeneous microstructure were thus obtained, as deduced by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The ability of this solution method to obtain PCT films with ferroelectric and dielectric responses is also demonstrated in the present work. © 2006 American Chemical Society.
publishDate 2006
dc.date.none.fl_str_mv 2006
2024
2024
2024
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/10261/345986
url http://hdl.handle.net/10261/345986
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/CYCYT//MAT2004-02014
https://doi.org/10.1021/cm061767e
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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
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