Electrical properties of lanthanum silicate apatite electrolytes prepared by an innovative chemical route
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Publication Date: | 2014 |
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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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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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https://repositorio.ufrn.br/handle/123456789/33393 |
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eng |
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eng |
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openAccess |
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Electrochemical Society |
publisher.none.fl_str_mv |
Electrochemical Society |
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