Hebb–Wagner polarization method for determining the oxygen ion conductivity in barium cerate-zirconate - Publication - Bridge of Knowledge

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Hebb–Wagner polarization method for determining the oxygen ion conductivity in barium cerate-zirconate

Abstract

In this work, the partial conductivity of oxygen ions in BaCe0.6Zr0.2Y0.2O3 was studied at different temperatures and water partial pressures. For this purpose, a modified DC Hebb–Wagner polarization method with an electrode blocking for protons and electrons was used. A new type of measuring cell as well as a suitable calculation model were proposed for the determination of partial oxygen ionic conductivity in materials with three mobile charge carriers, namely, oxygen ions, protons and electrons. The obtained oxygen ion partial conductivity (σO) in the BaCe0.6Zr0.2Y0.2O3 mixed protonic oxygen ionic–electronic conductor was 2.3 × 10−3 S cm−1 at 800 °C and pO2 = 0.20 atm, pH2O = 0.023 atm. This is in agreement with the literature reports and indicates the feasibility of this method for characterization of mixed-conducting ceramics with unknown oxygen ionic conductivity. The obtained results also indicate the influence of protons on the conduction mechanism of oxygen ions. This information may be very useful for the analysis of the interaction between the charge carriers in mixed conducting materials.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
Journal of Materials Chemistry A no. 10, pages 7218 - 7227,
ISSN: 2050-7488
Language:
English
Publication year:
2022
Bibliographic description:
Miruszewski T., Dzierzgowski K., Winiarz P., Wachowski S., Mielewczyk-Gryń A., Gazda M.: Hebb–Wagner polarization method for determining the oxygen ion conductivity in barium cerate-zirconate// Journal of Materials Chemistry A -Vol. 10,iss. 13 (2022), s.7218-7227
DOI:
Digital Object Identifier (open in new tab) 10.1039/d1ta10916b
Sources of funding:
  • OPUS 2016/23/B/ST5/02137
Verified by:
Gdańsk University of Technology

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