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

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Ewa Drożdż-Cieśla AGH University of Science and Technology Faculty of Materials Science and Ceramics al. Mickiewicza 30 30-059 Cracow Poland

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

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

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

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

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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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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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