Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)

Autores
Aguilar Paz, C. J.; Ochoa Muñoz, Y.; Ponce, Miguel Adolfo; Rodríguez Páez, J. E.
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Pieces of porous polycrystalline SnO2 with and without cobalt have beenformed by the slip-casting method, using ceramic powders synthesized by thecontrolled precipitation method. A suitable methodology was developed forforming and sintering the pieces to enable controlled modification of theirmicrostructure, principally grain size, porosity, and type of intergranularcontacts. Better control of the microstructure was obtained in the samplescontaining cobalt. In these, predominance of open necks and intergranularcontacts was observed, which can represent Schottky barriers. Because of itsgood structural homogeneity, porosity, and small grain size (of the order of1 lm), the sample with 2 mol.% Co sintered at 1250C for 2 h was selected forelectrical characterization by complex impedance spectroscopy, varying theoperating temperature, concentration and nature of the surrounding gas (airor CO), and bias voltage. The resulting Rp and Cp curves were very sensitive tovariation in these parameters, being most obvious for the Cp curves, whichshowed a phenomenon of low-frequency dispersion when bias voltages otherthan zero were used, in the presence of O2, and at operating temperature of280C. The electrical behavior of the SnO2 with 2 mol.% Co sample sintered at1250C was consistent with the nature and microstructural characteristics ofthe active material and was justified based on the presence of shallow- anddeep-type defects, and variations in barrier height and width, caused byadsorption of gas molecules.
Fil: Aguilar Paz, C. J.. Universidad del Cauca; Colombia
Fil: Ochoa Muñoz, Y.. Universidad del Cauca; Colombia
Fil: Ponce, Miguel Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Rodríguez Páez, J. E.. Universidad del Cauca; Colombia
Materia
Sensores
Semiconductores
Sno2
Slip Casting
Synthesis
Electrical Characterization
Gas Sensing
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/10124
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/10124
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)Aguilar Paz, C. J.Ochoa Muñoz, Y.Ponce, Miguel AdolfoRodríguez Páez, J. E.SensoresSemiconductoresSno2Slip CastingSynthesisElectrical CharacterizationGas Sensinghttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Pieces of porous polycrystalline SnO2 with and without cobalt have beenformed by the slip-casting method, using ceramic powders synthesized by thecontrolled precipitation method. A suitable methodology was developed forforming and sintering the pieces to enable controlled modification of theirmicrostructure, principally grain size, porosity, and type of intergranularcontacts. Better control of the microstructure was obtained in the samplescontaining cobalt. In these, predominance of open necks and intergranularcontacts was observed, which can represent Schottky barriers. Because of itsgood structural homogeneity, porosity, and small grain size (of the order of1 lm), the sample with 2 mol.% Co sintered at 1250C for 2 h was selected forelectrical characterization by complex impedance spectroscopy, varying theoperating temperature, concentration and nature of the surrounding gas (airor CO), and bias voltage. The resulting Rp and Cp curves were very sensitive tovariation in these parameters, being most obvious for the Cp curves, whichshowed a phenomenon of low-frequency dispersion when bias voltages otherthan zero were used, in the presence of O2, and at operating temperature of280C. The electrical behavior of the SnO2 with 2 mol.% Co sample sintered at1250C was consistent with the nature and microstructural characteristics ofthe active material and was justified based on the presence of shallow- anddeep-type defects, and variations in barrier height and width, caused byadsorption of gas molecules.Fil: Aguilar Paz, C. J.. Universidad del Cauca; ColombiaFil: Ochoa Muñoz, Y.. Universidad del Cauca; ColombiaFil: Ponce, Miguel Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; ArgentinaFil: Rodríguez Páez, J. E.. Universidad del Cauca; ColombiaSpringer2015-11-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/10124Aguilar Paz, C. J.; Ochoa Muñoz, Y.; Ponce, Miguel Adolfo; Rodríguez Páez, J. E.; Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO); Springer; Journal Of Electronic Materials; 45; 1; 6-11-2015; 576–5930361-5235enginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s11664-015-4153-2info:eu-repo/semantics/altIdentifier/doi/10.1007/s11664-015-4153-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:19Zoai:ri.conicet.gov.ar:11336/10124instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:46:19.902CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
title Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
spellingShingle Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
Aguilar Paz, C. J.
Sensores
Semiconductores
Sno2
Slip Casting
Synthesis
Electrical Characterization
Gas Sensing
title_short Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
title_full Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
title_fullStr Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
title_full_unstemmed Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
title_sort Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
dc.creator.none.fl_str_mv Aguilar Paz, C. J.
Ochoa Muñoz, Y.
Ponce, Miguel Adolfo
Rodríguez Páez, J. E.
author Aguilar Paz, C. J.
author_facet Aguilar Paz, C. J.
Ochoa Muñoz, Y.
Ponce, Miguel Adolfo
Rodríguez Páez, J. E.
author_role author
author2 Ochoa Muñoz, Y.
Ponce, Miguel Adolfo
Rodríguez Páez, J. E.
author2_role author
author
author
dc.subject.none.fl_str_mv Sensores
Semiconductores
Sno2
Slip Casting
Synthesis
Electrical Characterization
Gas Sensing
topic Sensores
Semiconductores
Sno2
Slip Casting
Synthesis
Electrical Characterization
Gas Sensing
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Pieces of porous polycrystalline SnO2 with and without cobalt have beenformed by the slip-casting method, using ceramic powders synthesized by thecontrolled precipitation method. A suitable methodology was developed forforming and sintering the pieces to enable controlled modification of theirmicrostructure, principally grain size, porosity, and type of intergranularcontacts. Better control of the microstructure was obtained in the samplescontaining cobalt. In these, predominance of open necks and intergranularcontacts was observed, which can represent Schottky barriers. Because of itsgood structural homogeneity, porosity, and small grain size (of the order of1 lm), the sample with 2 mol.% Co sintered at 1250C for 2 h was selected forelectrical characterization by complex impedance spectroscopy, varying theoperating temperature, concentration and nature of the surrounding gas (airor CO), and bias voltage. The resulting Rp and Cp curves were very sensitive tovariation in these parameters, being most obvious for the Cp curves, whichshowed a phenomenon of low-frequency dispersion when bias voltages otherthan zero were used, in the presence of O2, and at operating temperature of280C. The electrical behavior of the SnO2 with 2 mol.% Co sample sintered at1250C was consistent with the nature and microstructural characteristics ofthe active material and was justified based on the presence of shallow- anddeep-type defects, and variations in barrier height and width, caused byadsorption of gas molecules.
Fil: Aguilar Paz, C. J.. Universidad del Cauca; Colombia
Fil: Ochoa Muñoz, Y.. Universidad del Cauca; Colombia
Fil: Ponce, Miguel Adolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Mar del Plata. Instituto de Investigación En Ciencia y Tecnología de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería; Argentina
Fil: Rodríguez Páez, J. E.. Universidad del Cauca; Colombia
description Pieces of porous polycrystalline SnO2 with and without cobalt have beenformed by the slip-casting method, using ceramic powders synthesized by thecontrolled precipitation method. A suitable methodology was developed forforming and sintering the pieces to enable controlled modification of theirmicrostructure, principally grain size, porosity, and type of intergranularcontacts. Better control of the microstructure was obtained in the samplescontaining cobalt. In these, predominance of open necks and intergranularcontacts was observed, which can represent Schottky barriers. Because of itsgood structural homogeneity, porosity, and small grain size (of the order of1 lm), the sample with 2 mol.% Co sintered at 1250C for 2 h was selected forelectrical characterization by complex impedance spectroscopy, varying theoperating temperature, concentration and nature of the surrounding gas (airor CO), and bias voltage. The resulting Rp and Cp curves were very sensitive tovariation in these parameters, being most obvious for the Cp curves, whichshowed a phenomenon of low-frequency dispersion when bias voltages otherthan zero were used, in the presence of O2, and at operating temperature of280C. The electrical behavior of the SnO2 with 2 mol.% Co sample sintered at1250C was consistent with the nature and microstructural characteristics ofthe active material and was justified based on the presence of shallow- anddeep-type defects, and variations in barrier height and width, caused byadsorption of gas molecules.
publishDate 2015
dc.date.none.fl_str_mv 2015-11-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/10124
Aguilar Paz, C. J.; Ochoa Muñoz, Y.; Ponce, Miguel Adolfo; Rodríguez Páez, J. E.; Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO); Springer; Journal Of Electronic Materials; 45; 1; 6-11-2015; 576–593
0361-5235
url http://hdl.handle.net/11336/10124
identifier_str_mv Aguilar Paz, C. J.; Ochoa Muñoz, Y.; Ponce, Miguel Adolfo; Rodríguez Páez, J. E.; Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO); Springer; Journal Of Electronic Materials; 45; 1; 6-11-2015; 576–593
0361-5235
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s11664-015-4153-2
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11664-015-4153-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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