Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes
Finely dispersed (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> (x = 0.05, 0.10, 0.15, 0.20, 0.25) powders are synthesized via liquid-phase techniques based on the co-precipitation of hydroxides and co-crystallizat...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Ceramics |
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| Online Access: | https://www.mdpi.com/2571-6131/6/2/65 |
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| author | Marina V. Kalinina Daria A. Dyuskina Irina G. Polyakova Sergey V. Mjakin Irina Yu. Kruchinina |
| author_facet | Marina V. Kalinina Daria A. Dyuskina Irina G. Polyakova Sergey V. Mjakin Irina Yu. Kruchinina |
| author_sort | Marina V. Kalinina |
| collection | DOAJ |
| description | Finely dispersed (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> (x = 0.05, 0.10, 0.15, 0.20, 0.25) powders are synthesized via liquid-phase techniques based on the co-precipitation of hydroxides and co-crystallization of nitrates. The prepared powders are used to obtain ceramic materials comprising fluorite-like solid solutions with the coherent scattering region (CSR) of about 88 nm (upon annealing at 1300 °C) and open porosity in the range of 1–15%. The effect of the synthesis procedure and sintering additives (SiO<sub>2</sub>, ZnO) on physicochemical and electrophysical properties of the resulting ceramics is studied. The prepared materials are found to possess a predominantly ionic type of electric conductivity with ion transfer numbers t<sub>i</sub> = 0.96–0.71 in the temperature range of 300–700 °C. The conductivity in solid solutions follows a vacancy mechanism with σ<sub>700 °C</sub> = 0.48 × 10<sup>−2</sup> S/cm. Physicochemical properties (density, open porosity, type and mechanism of electrical conductivity) of the obtained ceramic materials make them promising as solid oxide electrolytes for medium temperature fuel cells. |
| first_indexed | 2024-03-11T02:38:27Z |
| format | Article |
| id | doaj.art-07d7f3e8c604451db84bcab6a0990723 |
| institution | Directory Open Access Journal |
| issn | 2571-6131 |
| language | English |
| last_indexed | 2024-03-11T02:38:27Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Ceramics |
| spelling | doaj.art-07d7f3e8c604451db84bcab6a09907232023-11-18T09:44:31ZengMDPI AGCeramics2571-61312023-05-01621100111210.3390/ceramics6020065Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell ElectrolytesMarina V. Kalinina0Daria A. Dyuskina1Irina G. Polyakova2Sergey V. Mjakin3Irina Yu. Kruchinina4Institute of Silicate Chemistry of the Russian Academy of Sciences, 2 Makarova Emb, 199034 St. Petersburg, RussiaInstitute of Silicate Chemistry of the Russian Academy of Sciences, 2 Makarova Emb, 199034 St. Petersburg, RussiaInstitute of Silicate Chemistry of the Russian Academy of Sciences, 2 Makarova Emb, 199034 St. Petersburg, RussiaDepartment of Theory of Materials Sciences, Saint-Petersburg State Institute of Technology, Technical University, 24-26/49A Moskovsky Prospect, 190013 St. Petersburg, RussiaInstitute of Silicate Chemistry of the Russian Academy of Sciences, 2 Makarova Emb, 199034 St. Petersburg, RussiaFinely dispersed (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> (x = 0.05, 0.10, 0.15, 0.20, 0.25) powders are synthesized via liquid-phase techniques based on the co-precipitation of hydroxides and co-crystallization of nitrates. The prepared powders are used to obtain ceramic materials comprising fluorite-like solid solutions with the coherent scattering region (CSR) of about 88 nm (upon annealing at 1300 °C) and open porosity in the range of 1–15%. The effect of the synthesis procedure and sintering additives (SiO<sub>2</sub>, ZnO) on physicochemical and electrophysical properties of the resulting ceramics is studied. The prepared materials are found to possess a predominantly ionic type of electric conductivity with ion transfer numbers t<sub>i</sub> = 0.96–0.71 in the temperature range of 300–700 °C. The conductivity in solid solutions follows a vacancy mechanism with σ<sub>700 °C</sub> = 0.48 × 10<sup>−2</sup> S/cm. Physicochemical properties (density, open porosity, type and mechanism of electrical conductivity) of the obtained ceramic materials make them promising as solid oxide electrolytes for medium temperature fuel cells.https://www.mdpi.com/2571-6131/6/2/65co-precipitationco-crystallizationoxidesfinely dispersed powdersnanoceramicsdensity |
| spellingShingle | Marina V. Kalinina Daria A. Dyuskina Irina G. Polyakova Sergey V. Mjakin Irina Yu. Kruchinina Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes Ceramics co-precipitation co-crystallization oxides finely dispersed powders nanoceramics density |
| title | Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes |
| title_full | Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes |
| title_fullStr | Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes |
| title_full_unstemmed | Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes |
| title_short | Effect of Synthetic Approaches and Sintering Additives upon Physicochemical and Electrophysical Properties of Solid Solutions in the System (CeO<sub>2</sub>)<sub>1−x</sub>(Nd<sub>2</sub>O<sub>3</sub>)<sub>x</sub> for Fuel Cell Electrolytes |
| title_sort | effect of synthetic approaches and sintering additives upon physicochemical and electrophysical properties of solid solutions in the system ceo sub 2 sub sub 1 x sub nd sub 2 sub o sub 3 sub sub x sub for fuel cell electrolytes |
| topic | co-precipitation co-crystallization oxides finely dispersed powders nanoceramics density |
| url | https://www.mdpi.com/2571-6131/6/2/65 |
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