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Synthesis and characterization of apatite structure sputter deposited coatings dedicated to intermediate temperature solid oxide fuel cells
| hal.structure.identifier | Laboratoire d'études et de recherches sur les matériaux, les procédés et les surfaces [LERMPS] | |
| dc.contributor.author | BRIOIS, Pascal | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MAZATAUD, Cécile | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | FOURCADE, Sébastien | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MAUVY, Fabrice | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GRENIER, Jean-Claude | |
| hal.structure.identifier | Laboratoire d'études et de recherches sur les matériaux, les procédés et les surfaces [LERMPS] | |
| dc.contributor.author | BILLARD, Alain | |
| dc.date.issued | 2011 | |
| dc.identifier.issn | 0013-4651 | |
| dc.description.abstractEn | La-Si<sup> </sup>metallic coatings with La/Si ratios between 1.55 and 1.66 were<sup> </sup>synthesized by Direct Current Magnetron Sputtering of lanthanum and silicon<sup> </sup>targets in pure argon atmosphere. After the deposition stage, the<sup> </sup>ceramic apatite-structure coatings were obtained by thermal oxidation in air<sup> </sup>for 2 hours at 1173 K. The structural and chemical<sup> </sup>features of these films have been assessed by X-Ray Diffraction<sup> </sup>(XRD) and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive<sup> </sup>Spectroscopy (EDS). The electrical properties were determined by Complex Impedance<sup> </sup>Spectroscopy in planar configuration. The films with near apatite structure<sup> </sup>La/Si atomic ratio in range of La<sub>10</sub>Si<sub>6</sub>0<sub>27</sub> and La<sub>9.33</sub>Si<sub>6</sub>0<sub>26</sub> deposited<sup> </sup>on different substrates were initially amorphous. After thermal oxidation at<sup> </sup>1173 K in air, the coating crystallised under the expected<sup> </sup>apatite structure. SEM observation revealed that the film compactness and<sup> </sup>thickness increased after thermal oxidation. The film adhesion on SOFCs<sup> </sup>material is guaranteed if the anode support was not reduced<sup> </sup>before the deposition stage. A specific method was performed to<sup> </sup>measure the electrical conductivity, <i>i.e.</i> to determine the ionic conductivity<sup> </sup>of the film: it uses the four-point probe technique combined<sup> </sup>with ac impedance spectroscopy. The good agreement between measurements performed<sup> </sup>in this work (Ea = 0.75 eV, 973 K, <sup> </sup>= 3-4 10<sup>−3</sup> S*cm<sup>−1</sup>) and literature data allows concluding that<sup> </sup>deposited layers are of good quality and should be used<sup> </sup>as electrolyte in an Intermediate Temperature Solid Oxide Fuel Cell<sup> </sup>(IT-SOFC). | |
| dc.language.iso | en | |
| dc.publisher | Electrochemical Society | |
| dc.subject.en | SOFC | |
| dc.subject.en | Apatite | |
| dc.subject.en | Coating | |
| dc.subject.en | Synthesis | |
| dc.subject.en | Characterization | |
| dc.title.en | Synthesis and characterization of apatite structure sputter deposited coatings dedicated to intermediate temperature solid oxide fuel cells | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1149/2.026112jes | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of The Electrochemical Society | |
| bordeaux.page | B1479-B1484 | |
| bordeaux.volume | 158 | |
| bordeaux.issue | 12 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00643607 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00643607v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20The%20Electrochemical%20Society&rft.date=2011&rft.volume=158&rft.issue=12&rft.spage=B1479-B1484&rft.epage=B1479-B1484&rft.eissn=0013-4651&rft.issn=0013-4651&rft.au=BRIOIS,%20Pascal&MAZATAUD,%20C%C3%A9cile&FOURCADE,%20S%C3%A9bastien&MAUVY,%20Fabrice&GRENIER,%20Jean-Claude&rft.genre=article |
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