Structural and electrical characterisation of strontium zirconate proton conductor co-sputter deposited coatings View Full Text


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Article Info

DATE

2008-04-23

AUTHORS

M. Arab Pour Yazdi, P. Briois, S. Georges, F. Lapostolle, A. Billard

ABSTRACT

SrZr1−xYxO3 coatings were co-sputtered from metallic Zr–Y (84–16 at.%) and Sr targets in the presence of a reactive argon–oxygen gas mixture. The structural and chemical features of the film have been assessed by X-ray diffraction and scanning electron microscopy. The electrical properties have been investigated for different substrates by Complex Impedance Spectroscopy as a function of crystalline state, temperature and atmosphere. The as-deposited coatings are amorphous and crystallise after annealing at 673 K for 2 h under air. The stabilisation of the perovskite structure is a function of the nominal composition. The films are dense and present a good adhesion on different substrates. Crystallisation and mechanical stresses are detected by alternating current (AC) impedance spectroscopy. Significant ionic conductivity in the 473–823 K temperature range is evidenced in air. Two different conduction regimes in the presence of steam are attributed to a modification of the charge carrier nature. In spite of low conductivity values (σ ~10−6 S.cm−1 at 881 K), the activation energies are in agreement with that of Y-doped strontium zirconate ceramics (~0.7 eV in air). More... »

PAGES

285-291

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s11581-008-0224-1

DOI

http://dx.doi.org/10.1007/s11581-008-0224-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1040539732


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