Sodium superionic conductor sputter-deposited coatings |
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Authors: | D Horwat A Billard |
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Institution: | (1) Laboratoire de Science et Génie des Surfaces (UMR 7570), Ecole des Mines — Parc de Saurupt, F 54042 Nancy cedex |
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Abstract: | Thin sodium superionic conductor (Nasicon) coatings are deposited on rotating substrates by co-sputtering in the reactive
mode of a Zr-Si and a Na3PO4 target. The influence of the discharge current and of the target-to-substrate distance is investigated owing to the targeted
Na3Zr2Si2PO12 stoichiometry. A thermo-structural analysis shows that the amorphous as-deposited coating of convenient composition crystallises
around 700 °C in the monoclinic structure. Electrical measurements performed at room temperature after various annealing treatments
indicate a ionic conductivity of about 2·10−3 S·cm−1, consistent with that of bulk Nasicon.
Paper presented at the Patras Conference on Solid State Ionics — Transport Properties, Patras, Greece, Sept. 14 – 18, 2004. |
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