Thermal dielectric and Raman studies on the KNO3 compound high-temperature region

Calorimetric measurements for a heating-cooling cycle determine the transition temperature and enthalpy of the phases present in the KNO3compound. The effects correlated within the ionic conduction of the KNO3 compound were studied by impedance spectroscopy measurements in a frequency range from 0.1...

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Autores:
Jurado-Lasso, Fernando
Jurado-Lasso, Nathaly
Ortiz, Jaime
Jurado, Jesus Fabian
Tipo de recurso:
Article of journal
Fecha de publicación:
2016
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/60514
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/60514
http://bdigital.unal.edu.co/58846/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
ionic conduction
impedance spectroscopy
Raman spectroscopy
conducción iónica
espectroscopia de impedancia
espectroscopia Raman
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_51a2211d8948bdbd967ae59bdfe15e2e
oai_identifier_str oai:repositorio.unal.edu.co:unal/60514
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
title Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
spellingShingle Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
62 Ingeniería y operaciones afines / Engineering
ionic conduction
impedance spectroscopy
Raman spectroscopy
conducción iónica
espectroscopia de impedancia
espectroscopia Raman
title_short Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
title_full Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
title_fullStr Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
title_full_unstemmed Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
title_sort Thermal dielectric and Raman studies on the KNO3 compound high-temperature region
dc.creator.fl_str_mv Jurado-Lasso, Fernando
Jurado-Lasso, Nathaly
Ortiz, Jaime
Jurado, Jesus Fabian
dc.contributor.author.spa.fl_str_mv Jurado-Lasso, Fernando
Jurado-Lasso, Nathaly
Ortiz, Jaime
Jurado, Jesus Fabian
dc.subject.ddc.spa.fl_str_mv 62 Ingeniería y operaciones afines / Engineering
topic 62 Ingeniería y operaciones afines / Engineering
ionic conduction
impedance spectroscopy
Raman spectroscopy
conducción iónica
espectroscopia de impedancia
espectroscopia Raman
dc.subject.proposal.spa.fl_str_mv ionic conduction
impedance spectroscopy
Raman spectroscopy
conducción iónica
espectroscopia de impedancia
espectroscopia Raman
description Calorimetric measurements for a heating-cooling cycle determine the transition temperature and enthalpy of the phases present in the KNO3compound. The effects correlated within the ionic conduction of the KNO3 compound were studied by impedance spectroscopy measurements in a frequency range from 0.1 to 10 MHz for a cooling cycle. The imaginary part of the impedance with a frequency between 200 and 100°C showed a displacement of the Debye-like peak in the lower frequency direction. This displacement indicates an increase in the relaxation times of ionic conductivity by jump. In the dielectric formalism module, the imaginary part showed an asymmetric peak as a correlation consequence in the cationic diffusion. Also the registers demonstrated that the process is thermally activated, with activation energy that is very close to the one obtained for dc conduction. From these results, it can be inferred that both, diffusion and conductivity mechanisms have the same origin. The Raman spectroscopy measurements, based on temperature (when cooling), allowed for correlation on each of the adopted phases and for changes in normal active modes of the isolated groups D2h through the evolution of the active modes ν3 and ν2.
publishDate 2016
dc.date.issued.spa.fl_str_mv 2016-07-01
dc.date.accessioned.spa.fl_str_mv 2019-07-02T18:29:42Z
dc.date.available.spa.fl_str_mv 2019-07-02T18:29:42Z
dc.type.spa.fl_str_mv Artículo de revista
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dc.identifier.issn.spa.fl_str_mv ISSN: 2346-2183
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/60514
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identifier_str_mv ISSN: 2346-2183
url https://repositorio.unal.edu.co/handle/unal/60514
http://bdigital.unal.edu.co/58846/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.spa.fl_str_mv https://revistas.unal.edu.co/index.php/dyna/article/view/54693
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Dyna
Dyna
dc.relation.references.spa.fl_str_mv Jurado-Lasso, Fernando and Jurado-Lasso, Nathaly and Ortiz, Jaime and Jurado, Jesus Fabian (2016) Thermal dielectric and Raman studies on the KNO3 compound high-temperature region. DYNA, 83 (198). pp. 244-249. ISSN 2346-2183
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Universidad Nacional de Colombia (Sede Medellín). Facultad de Minas.
institution Universidad Nacional de Colombia
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Jurado-Lasso, Fernando7ed22a0a-268d-417e-9194-24be618f03a5300Jurado-Lasso, Nathalyd4323498-ea07-48cd-9893-a3c8d1c7d8e5300Ortiz, Jaimedcd3f4ae-fd61-4220-bb68-4b5f91433ede300Jurado, Jesus Fabian416fdaf6-8a38-4d71-8d8a-ace1271c5eac3002019-07-02T18:29:42Z2019-07-02T18:29:42Z2016-07-01ISSN: 2346-2183https://repositorio.unal.edu.co/handle/unal/60514http://bdigital.unal.edu.co/58846/Calorimetric measurements for a heating-cooling cycle determine the transition temperature and enthalpy of the phases present in the KNO3compound. The effects correlated within the ionic conduction of the KNO3 compound were studied by impedance spectroscopy measurements in a frequency range from 0.1 to 10 MHz for a cooling cycle. The imaginary part of the impedance with a frequency between 200 and 100°C showed a displacement of the Debye-like peak in the lower frequency direction. This displacement indicates an increase in the relaxation times of ionic conductivity by jump. In the dielectric formalism module, the imaginary part showed an asymmetric peak as a correlation consequence in the cationic diffusion. Also the registers demonstrated that the process is thermally activated, with activation energy that is very close to the one obtained for dc conduction. From these results, it can be inferred that both, diffusion and conductivity mechanisms have the same origin. The Raman spectroscopy measurements, based on temperature (when cooling), allowed for correlation on each of the adopted phases and for changes in normal active modes of the isolated groups D2h through the evolution of the active modes ν3 and ν2.Medidas DSC para un ciclo de enfriamiento-calentamiento permiten determinar las temperaturas y entalpías de transición de fases del compuesto KNO3. Efectos correlacionados en la conducción iónica del compuesto KNO3, fueron estudiados por medidas de espectroscopia de impedancia en el rango de frecuencia de 0.1 a 10 MHz, para un ciclo de enfriamiento desde 200 a 100°C. La tendencia de la impedancia parte imaginaria con la frecuencia y la temperatura, mostró un desplazamiento del pico “Debye-like” hacia la región de menor frecuencia, este corrimiento indica un aumento en los tiempos de relajación en la conducción iónica por salto. El módulo dieléctrico parte imaginaria, mostró un pico asimétrico como consecuencia de correlaciones en la difusión catiónica, así también, se evidencia que el proceso es térmicamente activado con energía de muy próxima a la obtenida para la conducción dc. Los resultados apuntan a inferir que los dos mecanismos de difusión y conductividad tienen el mismo origen. Medidas de espectroscopia Raman en función de la temperatura (enfriando), permitió correlacionar en cada una de las fases adoptadas los cambios en los modos activos normales de los grupos aislados D2h, a través de la evolución de los modos activos ν3 y ν2.application/pdfspaUniversidad Nacional de Colombia (Sede Medellín). Facultad de Minas.https://revistas.unal.edu.co/index.php/dyna/article/view/54693Universidad Nacional de Colombia Revistas electrónicas UN DynaDynaJurado-Lasso, Fernando and Jurado-Lasso, Nathaly and Ortiz, Jaime and Jurado, Jesus Fabian (2016) Thermal dielectric and Raman studies on the KNO3 compound high-temperature region. DYNA, 83 (198). pp. 244-249. ISSN 2346-218362 Ingeniería y operaciones afines / Engineeringionic conductionimpedance spectroscopyRaman spectroscopyconducción iónicaespectroscopia de impedanciaespectroscopia RamanThermal dielectric and Raman studies on the KNO3 compound high-temperature regionArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL54693-306185-2-PB.pdfapplication/pdf611342https://repositorio.unal.edu.co/bitstream/unal/60514/1/54693-306185-2-PB.pdfb6b928385e94c4f75dcc11c217150595MD51THUMBNAIL54693-306185-2-PB.pdf.jpg54693-306185-2-PB.pdf.jpgGenerated Thumbnailimage/jpeg9803https://repositorio.unal.edu.co/bitstream/unal/60514/2/54693-306185-2-PB.pdf.jpg87f8fd6bc78451a55850f0c077b1bbfeMD52unal/60514oai:repositorio.unal.edu.co:unal/605142024-04-13 23:10:49.976Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co

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