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Ionic conductivity behavior by activated hopping conductivity (AHC) of barium aluminoborosilicate glass–ceramic system designed for SOFC sealing
Abstract
Non-conducting BaO-B2O3-Al2O3-SiO2 parent glasses designed for solid oxide fuel cell (SOFC) sealing applications were prepared using the melt-quenching technique. The glass formation region was determined according to phase equilibrium relations and was found to be in the composition range 70BaO-(x)Al2O3-(10−x)B2O3-20SiO2 where 3.0 < x < 6.0 wt%. The conductivity values obtained conductivity ranged from 10−5 to 10−10 S/cm at temperatures between 600 and 850 °C. The batch compositions presented a threshold of dc conductivity near 70BaO wt% with a quasi linear behavior with the decrease of the BaO content. Different values of conduction activation energy were observed at temperatures above the glass transition temperature (Tg) (up to 700 °C), which were attributed to the thermal bond-breaking of non-bridging oxygen (NBO) defects. The experimental results of the electrochemical characterization by impedance spectroscopy of glass–ceramic interfaces with yttria-stabilized zirconia (YSZ) acting as solid ionic conductor electrolyte are presented and discussed.
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Authors (6)
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M Da
- Universidade de São Paulo Departamento de Física Geral
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W Pontuschka
- Universidade de São Paulo Departamento de Física Geral
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J Bartolomé
- Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones Científicas
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Signo Reis
- Missouri University of Science and Technology Department of Material Science & Engineering
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
no. 39,
pages 3103 - 3111,
ISSN: 0955-2219 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Da M., Pontuschka W., Bartolomé J., Jasiński P., Karczewski J., Reis S.: Ionic conductivity behavior by activated hopping conductivity (AHC) of barium aluminoborosilicate glass–ceramic system designed for SOFC sealing// JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. -Vol. 39, iss. 10 (2019), s.3103-3111
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jeurceramsoc.2019.03.027
- Verified by:
- Gdańsk University of Technology
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