Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics
Ca3Co4-xNixO9 (x=0.01, 0.03, and 0.05) polycrystalline thermoelectric ceramics have been prepared by the classical solid state method. As a result of the Ni addition an increase in porosity has been detected. Moreover, the presence of Ni has been related with the increase of Ca2Co3O6 secondary phase...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-01-01
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| Series: | Boletín de la Sociedad Española de Cerámica y Vidrio |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0366317515000059 |
| _version_ | 1828285778992562176 |
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| author | Gabriel Constantinescu Shahed Rasekh Miguel Angel Torres Pablo Bosque Maria Antonieta Madre Andres Sotelo Juan Carlos Diez |
| author_facet | Gabriel Constantinescu Shahed Rasekh Miguel Angel Torres Pablo Bosque Maria Antonieta Madre Andres Sotelo Juan Carlos Diez |
| author_sort | Gabriel Constantinescu |
| collection | DOAJ |
| description | Ca3Co4-xNixO9 (x=0.01, 0.03, and 0.05) polycrystalline thermoelectric ceramics have been prepared by the classical solid state method. As a result of the Ni addition an increase in porosity has been detected. Moreover, the presence of Ni has been related with the increase of Ca2Co3O6 secondary phase and the appearance of a new NiO-CoO solid solution.
However, for the 0.01-Ni doped samples an improvement in the thermoelectric performances has been measured. This effect has been related with a decrease in the resistivity values and an increase in the Seebeck coefficient.
The raise in the power factor for the 0.01-Ni doped samples, compared with the undoped ones, is between 10 and 25% at 50 and 800 °C respectively. Moreover, the maximum power at 800 °C, around 0.25 mW/K2.m, is significantly higher than the best results obtained in Ni doped samples reported previously in the literature. |
| first_indexed | 2024-04-13T09:20:29Z |
| format | Article |
| id | doaj.art-e0c6f716591845a189fc5a405e7efac2 |
| institution | Directory Open Access Journal |
| issn | 0366-3175 |
| language | English |
| last_indexed | 2024-04-13T09:20:29Z |
| publishDate | 2015-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Boletín de la Sociedad Española de Cerámica y Vidrio |
| spelling | doaj.art-e0c6f716591845a189fc5a405e7efac22022-12-22T02:52:38ZengElsevierBoletín de la Sociedad Española de Cerámica y Vidrio0366-31752015-01-01541212710.1016/j.bsecv.2015.02.004Thermoelectric doping effect in Ca3Co4-xNixO9 ceramicsGabriel Constantinescu0Shahed Rasekh1Miguel Angel Torres2Pablo Bosque3Maria Antonieta Madre4Andres Sotelo5Juan Carlos Diez6National Institute of Materials Physics, Magurele, Bucharest, RomaniaInstituto de Ciencia de Materiales de Aragón (Zaragoza University-Consejo Superior de Investigaciones Científicas), Zaragoza, SpainInstituto de Ciencia de Materiales de Aragón (Zaragoza University-Consejo Superior de Investigaciones Científicas), Zaragoza, SpainUniversity Center for the Defense of Zaragoza, General Military Academy, Zaragoza, SpainInstituto de Ciencia de Materiales de Aragón (Zaragoza University-Consejo Superior de Investigaciones Científicas), Zaragoza, SpainInstituto de Ciencia de Materiales de Aragón (Zaragoza University-Consejo Superior de Investigaciones Científicas), Zaragoza, SpainInstituto de Ciencia de Materiales de Aragón (Zaragoza University-Consejo Superior de Investigaciones Científicas), Zaragoza, SpainCa3Co4-xNixO9 (x=0.01, 0.03, and 0.05) polycrystalline thermoelectric ceramics have been prepared by the classical solid state method. As a result of the Ni addition an increase in porosity has been detected. Moreover, the presence of Ni has been related with the increase of Ca2Co3O6 secondary phase and the appearance of a new NiO-CoO solid solution. However, for the 0.01-Ni doped samples an improvement in the thermoelectric performances has been measured. This effect has been related with a decrease in the resistivity values and an increase in the Seebeck coefficient. The raise in the power factor for the 0.01-Ni doped samples, compared with the undoped ones, is between 10 and 25% at 50 and 800 °C respectively. Moreover, the maximum power at 800 °C, around 0.25 mW/K2.m, is significantly higher than the best results obtained in Ni doped samples reported previously in the literature.http://www.sciencedirect.com/science/article/pii/S0366317515000059OxidesElectric propertiesThermoelectric |
| spellingShingle | Gabriel Constantinescu Shahed Rasekh Miguel Angel Torres Pablo Bosque Maria Antonieta Madre Andres Sotelo Juan Carlos Diez Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics Boletín de la Sociedad Española de Cerámica y Vidrio Oxides Electric properties Thermoelectric |
| title | Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics |
| title_full | Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics |
| title_fullStr | Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics |
| title_full_unstemmed | Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics |
| title_short | Thermoelectric doping effect in Ca3Co4-xNixO9 ceramics |
| title_sort | thermoelectric doping effect in ca3co4 xnixo9 ceramics |
| topic | Oxides Electric properties Thermoelectric |
| url | http://www.sciencedirect.com/science/article/pii/S0366317515000059 |
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