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

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Abstract  

The mutual reactivity in mixtures containing Nasicon (Na3Zr2Si2PO12) or YSZ (ZrO2:Y2O3) solid electrolytes with Li2CO3 or Li2CO3:BaCO3 sensing electrode materials was investigated using simultaneous DTA and TG and ex situ XRD techniques. The uncontrolled chemical reaction is suspected to be responsible for the instability of electrochemical gas sensors constructed from these materials. DTA and TG results obtained for Nasicon-carbonate mixtures indicate the possibility of reaction in the temperature range from about 470 to 650C, which overlaps the sensor operating temperature range (300–525C). The results obtained for YSZ-carbonate mixtures indicate that reaction between carbonate and the ZrO2 takes place at higher temperatures and cannot explain the instability drift of investigated sensors. The mechanism of observed reactions in systems studied is also discussed.

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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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