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Chemical stability of Ba(Ce1−xTix)1−yYyO3 proton-conducting solid electrolytes

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Abstract

The purpose of this work was to investigate the influence of titanium and yttrium dopants on chemical stability of selected Ba(Ce1−xTix)1−yYyO3 compounds. The presented results are the part of wider research concerning the crystallographic structure, microstructure, electrical and transport properties of these groups of materials.

Samples of Ba(Ce1−xTix)1−yYyO3 with x=0.05, 0.07, 0.10, 0.15, 0.20, 0.30 and y=0.05, 0.10, 0.20 (for x=0.05) were prepared by solid-state reaction method. Initially, differential thermal analysis (DTA) and thermogravimetry (TG) were used for optimization of preparation conditions. Subsequently, DTA-TG-MS (mass spectrometry) techniques were applied for evaluation of the stability of prepared materials in the presence of CO2. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results were used to determine the phase composition, structure and microstructure of materials and to assist the interpretation of DTA-TG-MS results.

The strong influence of Ti and Y dopants contents (x and y) on the properties was found. The introduction of Ti dopant led to the improvement of chemical stability against CO2. The lower Ti concentration the better resistance against CO2 corrosion was observed. Doping by Y had the opposite effect; the decrease of chemical stability was determined. In this case the higher Y dopant concentration the better resistance was observed. The attempt to correlate the influence of dopant on structure and chemical stability was also presented.

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Authors and Affiliations

  1. Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059, Cracow, Poland

    P. Pasierb, Ewa Drożdż-Cieśla, R. Gajerski, S. Łabuś, S. Komornicki & M. Rękas

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  1. P. Pasierb
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  2. Ewa Drożdż-Cieśla
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  3. R. Gajerski
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  4. S. Łabuś
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  5. S. Komornicki
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  6. M. Rękas
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Correspondence to P. Pasierb.

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Pasierb, P., Drożdż-Cieśla, E., Gajerski, R. et al. Chemical stability of Ba(Ce1−xTix)1−yYyO3 proton-conducting solid electrolytes. J Therm Anal Calorim 96, 475–480 (2009). https://doi.org/10.1007/s10973-008-9829-x

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  • DOI: https://doi.org/10.1007/s10973-008-9829-x

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