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dc.contributor.author
Aguilar Paz, C. J.
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Ochoa Muñoz, Y.
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Ponce, Miguel Adolfo
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dc.contributor.author
Rodríguez Páez, J. E.
dc.date.available
2016-12-26T17:11:02Z
dc.date.issued
2015-11-06
dc.identifier.citation
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
dc.identifier.issn
0361-5235
dc.identifier.uri
http://hdl.handle.net/11336/10124
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Sensores
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Semiconductores
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Sno2
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Slip Casting
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Synthesis
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Electrical Characterization
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Gas Sensing
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Otras Ingeniería de los Materiales
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Ingeniería de los Materiales
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INGENIERÍAS Y TECNOLOGÍAS
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Física de los Materiales Condensados
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Electrical behavior of SnO2 polycrystalline ceramic pieces formed by slip Casting: effect of surrounding atmosphere (Air and CO)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
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info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-10-07T20:17:15Z
dc.journal.volume
45
dc.journal.number
1
dc.journal.pagination
576–593
dc.journal.pais
Alemania
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dc.journal.ciudad
Berlin
dc.description.fil
Fil: Aguilar Paz, C. J.. Universidad del Cauca; Colombia
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Fil: Ochoa Muñoz, Y.. Universidad del Cauca; Colombia
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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
dc.description.fil
Fil: Rodríguez Páez, J. E.. Universidad del Cauca; Colombia
dc.journal.title
Journal Of Electronic Materials
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s11664-015-4153-2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11664-015-4153-2
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