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Effect of total pressure on La 2 NiO 4 coatings deposited by reactive magnetron sputtering using plasma emission monitoring

Fondard, Jérémie and Billard, Alain and Bertrand, Ghislaine and Fourcade, Sébastien and Batocchi, Pierre and Mauvy, Fabrice and Briois, Pascal Effect of total pressure on La 2 NiO 4 coatings deposited by reactive magnetron sputtering using plasma emission monitoring. (2016) Surface and Coatings Technology, 295. 29-36. ISSN 0257-8972

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Official URL: https://doi.org/10.1016/j.surfcoat.2015.11.053

Abstract

This work focuses on the structural, microstructural, electrical and electrochemical characterization of La–Ni–O coatings deposited by reactive magnetron sputtering under different argon partial pressures. Deposition was driven by Plasma Emission Monitoring system (PEM) which allows high deposition rate. For each pressure, the optimal regulation setpoint for lanthanum oxide deposition is determined and then the current dissipated on the nickel target is adjusted to obtain the convenient La/Ni ratio to achieve the K2NiF4 structure. After an appropriate annealing treatment, coatings crystallize in the desired structure with more or less impurities. Increasing the device's pressure from 0.4 to 4.8Pa produces more porous samples with different microstructures. Then, a coating with porosity gradient was built by using these four different total pressures. Its electrical performances were tested and allowed its utilization as cathode layer in intermediate temperature-solid oxide fuel cell (IT-SOFC). This modified architecture cathode allows better performances (71mW·cm−2) than dense cathode produced by the same technique (51mW·cm−2).

Item Type:Article
HAL Id:hal-02430400
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Mécanique et des Microtechniques - ENSMM (FRANCE)
French research institutions > Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux - IFSTTAR (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Other partners > Institut de recherche sur les transports, l'énergie et la société - IRTES (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
Other partners > Université de Franche-Comté (FRANCE)
Other partners > Université de Technologie de Belfort-Montbéliard - UTBM (FRANCE)
Other partners > Ecole Centrale de Lyon (FRANCE)
Other partners > Université de Bordeaux (FRANCE)
Other partners > Université Bourgogne Franche-Comté - UBFC (FRANCE)
Laboratory name:
Funders:
Pays de Montbéliard Agglomeration
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Deposited On:07 Jan 2020 11:07

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