Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route

Bibliographic Details
Main Author: Martinelli, Antonio Eduardo
Publication Date: 2014
Other Authors: Macedo, Graziele Lopes, Macedo, Daniel Araújo de, Rajesh, Surendran, Figueiredo, Filipe M. L., Marques, Fernando M. B., Nascimento, Rubens Maribondo do
Format: Article
Language: eng
Source: Repositório Institucional da UFRN
Download full: https://repositorio.ufrn.br/handle/123456789/33393
Summary: This work reports the synthesis of apatite-type lanthanum silicate powders with nominal composition La10Si6O27 by an innovative chemical route which combines co-precipitation and sol-gel approaches. The herein proposed synthetic procedure is advantageous in reducing energy consumption and processing time, key elements to decrease the total manufacturing cost. The asprepared powder was calcined between 500 and 900 °C. Structure of the calcined powders, characterized by X-ray diffraction (XRD) and Rietveld refinement, indicated the formation of apatite crystalline lanthanum silicate with minor amount of L2O3 at 900 °C. The apatite powder was further analyzed by scanning electron microscopy (SEM). The effect of sintering temperature, ranging from 1400 to 1450 °C, on the electrical properties was investigated by impedance spectroscopy. Electrical measurements were recorded in the 400 – 800 °C temperature range. The lanthanum silicate electrolyte sintered at 1450 °C exhibited total electrical conductivity (σ700 ºC = 2.12 x 10-3 S.cm-1) comparable with samples from literature prepared by sol-gel and freeze drying methods and sintered at 1500 °C. The results in the present study demonstrate that the co-precipitation method combined with a solgel approach is a promising alternative route to synthesize lanthanum silicate powders
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spelling Martinelli, Antonio EduardoMacedo, Graziele LopesMacedo, Daniel Araújo deRajesh, SurendranFigueiredo, Filipe M. L.Marques, Fernando M. B.Nascimento, Rubens Maribondo do2021-09-14T13:56:53Z2021-09-14T13:56:53Z2014-09-29MACEDO, G. L.; MACEDO, D. A.; RAJESH, S.; MARTINELLI, A. E.; FIGUEIREDO, F. M.; MARQUES, F.; NASCIMENTO, R. M.. Electrical Properties of Lanthanum Silicate Apatite Electrolytes Prepared by an Innovative Chemical Route. Ecs Transactions, [S.L.], v. 61, n. 36, p. 23-31, 29 set. 2014. Disponível em: https://iopscience.iop.org/article/10.1149/06136.0023ecst. Acesso em: 01 fev. 2021. http://dx.doi.org/10.1149/06136.0023ecst.1938-6737https://repositorio.ufrn.br/handle/123456789/3339310.1149/06136.0023ecstElectrochemical SocietyLanthanum SilicateInnovative Chemical RouteElectrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical routeinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleThis work reports the synthesis of apatite-type lanthanum silicate powders with nominal composition La10Si6O27 by an innovative chemical route which combines co-precipitation and sol-gel approaches. The herein proposed synthetic procedure is advantageous in reducing energy consumption and processing time, key elements to decrease the total manufacturing cost. The asprepared powder was calcined between 500 and 900 °C. Structure of the calcined powders, characterized by X-ray diffraction (XRD) and Rietveld refinement, indicated the formation of apatite crystalline lanthanum silicate with minor amount of L2O3 at 900 °C. The apatite powder was further analyzed by scanning electron microscopy (SEM). The effect of sintering temperature, ranging from 1400 to 1450 °C, on the electrical properties was investigated by impedance spectroscopy. Electrical measurements were recorded in the 400 – 800 °C temperature range. The lanthanum silicate electrolyte sintered at 1450 °C exhibited total electrical conductivity (σ700 ºC = 2.12 x 10-3 S.cm-1) comparable with samples from literature prepared by sol-gel and freeze drying methods and sintered at 1500 °C. The results in the present study demonstrate that the co-precipitation method combined with a solgel approach is a promising alternative route to synthesize lanthanum silicate powdersengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/33393/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/33393/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/333932022-10-19 16:57:37.889oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2022-10-19T19:57:37Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
title Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
spellingShingle Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
Martinelli, Antonio Eduardo
Lanthanum Silicate
Innovative Chemical Route
title_short Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
title_full Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
title_fullStr Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
title_full_unstemmed Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
title_sort Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
author Martinelli, Antonio Eduardo
author_facet Martinelli, Antonio Eduardo
Macedo, Graziele Lopes
Macedo, Daniel Araújo de
Rajesh, Surendran
Figueiredo, Filipe M. L.
Marques, Fernando M. B.
Nascimento, Rubens Maribondo do
author_role author
author2 Macedo, Graziele Lopes
Macedo, Daniel Araújo de
Rajesh, Surendran
Figueiredo, Filipe M. L.
Marques, Fernando M. B.
Nascimento, Rubens Maribondo do
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Martinelli, Antonio Eduardo
Macedo, Graziele Lopes
Macedo, Daniel Araújo de
Rajesh, Surendran
Figueiredo, Filipe M. L.
Marques, Fernando M. B.
Nascimento, Rubens Maribondo do
dc.subject.por.fl_str_mv Lanthanum Silicate
Innovative Chemical Route
topic Lanthanum Silicate
Innovative Chemical Route
description This work reports the synthesis of apatite-type lanthanum silicate powders with nominal composition La10Si6O27 by an innovative chemical route which combines co-precipitation and sol-gel approaches. The herein proposed synthetic procedure is advantageous in reducing energy consumption and processing time, key elements to decrease the total manufacturing cost. The asprepared powder was calcined between 500 and 900 °C. Structure of the calcined powders, characterized by X-ray diffraction (XRD) and Rietveld refinement, indicated the formation of apatite crystalline lanthanum silicate with minor amount of L2O3 at 900 °C. The apatite powder was further analyzed by scanning electron microscopy (SEM). The effect of sintering temperature, ranging from 1400 to 1450 °C, on the electrical properties was investigated by impedance spectroscopy. Electrical measurements were recorded in the 400 – 800 °C temperature range. The lanthanum silicate electrolyte sintered at 1450 °C exhibited total electrical conductivity (σ700 ºC = 2.12 x 10-3 S.cm-1) comparable with samples from literature prepared by sol-gel and freeze drying methods and sintered at 1500 °C. The results in the present study demonstrate that the co-precipitation method combined with a solgel approach is a promising alternative route to synthesize lanthanum silicate powders
publishDate 2014
dc.date.issued.fl_str_mv 2014-09-29
dc.date.accessioned.fl_str_mv 2021-09-14T13:56:53Z
dc.date.available.fl_str_mv 2021-09-14T13:56:53Z
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.citation.fl_str_mv MACEDO, G. L.; MACEDO, D. A.; RAJESH, S.; MARTINELLI, A. E.; FIGUEIREDO, F. M.; MARQUES, F.; NASCIMENTO, R. M.. Electrical Properties of Lanthanum Silicate Apatite Electrolytes Prepared by an Innovative Chemical Route. Ecs Transactions, [S.L.], v. 61, n. 36, p. 23-31, 29 set. 2014. Disponível em: https://iopscience.iop.org/article/10.1149/06136.0023ecst. Acesso em: 01 fev. 2021. http://dx.doi.org/10.1149/06136.0023ecst.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/33393
dc.identifier.issn.none.fl_str_mv 1938-6737
dc.identifier.doi.none.fl_str_mv 10.1149/06136.0023ecst
identifier_str_mv MACEDO, G. L.; MACEDO, D. A.; RAJESH, S.; MARTINELLI, A. E.; FIGUEIREDO, F. M.; MARQUES, F.; NASCIMENTO, R. M.. Electrical Properties of Lanthanum Silicate Apatite Electrolytes Prepared by an Innovative Chemical Route. Ecs Transactions, [S.L.], v. 61, n. 36, p. 23-31, 29 set. 2014. Disponível em: https://iopscience.iop.org/article/10.1149/06136.0023ecst. Acesso em: 01 fev. 2021. http://dx.doi.org/10.1149/06136.0023ecst.
1938-6737
10.1149/06136.0023ecst
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dc.publisher.none.fl_str_mv Electrochemical Society
publisher.none.fl_str_mv Electrochemical Society
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