Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes - Publikacja - MOST Wiedzy

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Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

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This review paper focuses on the phenomenon of thermochemical expansion of two specific categories of conducting ceramics: Proton Conducting Ceramics (PCC) and Mixed Ionic-Electronic Conductors (MIEC). The theory of thermal expansion of ceramics is underlined from microscopic to macroscopic points of view while the chemical expansion is explained based on crystallography and defect chemistry. Modelling methods are used to predict the thermochemical expansion of PCCs and MIECs with two examples: hydration of barium zirconate (BaZr1−xYxO3−δ) and oxidation/reduction of La1−xSrxCo0.2Fe0.8O3−δ. While it is unusual for a review paper, we conducted experiments to evaluate the influence of the heating rate in determining expansion coefficients experimentally. This was motivated by the discrepancy of some values in literature. The conclusions are that the heating rate has little to no effect on the obtained values. Models for the expansion coefficients of a composite material are presented and include the effect of porosity. A set of data comprising thermal and chemical expansion coefficients has been gathered from the literature and presented here divided into two groups: protonic electrolytes and mixed ionic-electronic conductors. Finally, the methods of mitigation of the thermal mismatch problem are discussed

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Accepted albo Published Version
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Creative Commons: CC-BY otwiera się w nowej karcie

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
Crystals nr 8, wydanie 9, strony 1 - 68,
ISSN: 2073-4352
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Løken A., Ricote S., Wachowski S.: Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes// Crystals. -Vol. 8, iss. 9 (2018), s.1-68
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.3390/cryst8090365
Weryfikacja:
Politechnika Gdańska

wyświetlono 210 razy

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