Thin films of non-stoichiometric perovskites as potential oxygen sensors

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DOIResolve DOI: http://doi.org/10.1016/0925-4005(93)85379-O
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TypeArticle
Journal titleSensors and Actuators B: Chemical
Volume13
Issue1-3
Pages272275; # of pages: 4
AbstractThin films of non-stoichiometric perovskites of general formula ABO₂.₅ + x have been grown, on sapphire substrates, by the technique of pulsed laser ablation/deposition. The structural properties of the films upon exposure to atmospheres of various oxygen pressures, at elevated temperatures, have been determined by X-ray diffraction; they show changes which correlate with those found for bulk powder samples. For the material SrFeO₂.₅ + x, with 0 ≤ x ≤ 0.5, pressure-composition isotherms reveal several pressure ranges over which structural changes occur. By monitoring the changes in physical properties that accompany the bulk chemical changes, this system can be exploited to provide a thin-film sensor, the structural changes of which are specific to oxygen.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number51990
NPARC number13102757
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Record identifiered74cb9b-9a8c-467f-a8b2-e96e79f80df8
Record created2009-12-14
Record modified2016-05-09
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