Electrophysical and thermomechanical properties of perovskites La0.5A0.5Mn0.5Ti0.5O3–δ (A = Ca, Sr, Ba) used as fuel cell anodes: the effect of radius of alkali-earth cation
- Авторлар: Kolotygin V.1, Ivanov A.1, Bredikhin S.1, Kharton V.1,2
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Мекемелер:
- Institute of Solid State Physics
- Center for Research in Ceramics and Composite Materials (CICECO)
- Шығарылым: Том 52, № 7 (2016)
- Беттер: 622-627
- Бөлім: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/187960
- DOI: https://doi.org/10.1134/S1023193516070077
- ID: 187960
Дәйексөз келтіру
Аннотация
The effect of the radius of the alkali-earth cation substituted into the A sublattice of La0.5A0.5Mn0.5Ti0.5O3–δ (А = Са, Sr, Ba) perovskites on their stability and transport and thermomechanical properties is considered. The increase in the cation radius is shown to improve the phase stability and decrease the conductivity under both oxidative and reductive conditions. The thermal and chemical expansion of La0.5A0.5Mn0.5Ti0.5O3–δ ceramics is studied by dilatometry in controlled atmospheres and a wide temperature range at p(O2)=10–21–0.21 atm. The coefficients of thermal expansion of La0.5A0.5Mn0.5Ti0.5O3–δ are in the interval of (10.7–14.3)× 10–6 K–1, i.e., compatible with those of standard solid electrolytes of solid-oxide fuel cells. The maximum chemical expansion does not exceed 0.2% at isothermal reduction in the CO‒CO2 mixture.
Негізгі сөздер
Авторлар туралы
V. Kolotygin
Institute of Solid State Physics
Email: aliv@issp.ac.ru
Ресей, ul. Akademika Osip’yana 2, Moscow oblast’, Chernogolovka, 142432
A. Ivanov
Institute of Solid State Physics
Хат алмасуға жауапты Автор.
Email: aliv@issp.ac.ru
Ресей, ul. Akademika Osip’yana 2, Moscow oblast’, Chernogolovka, 142432
S. Bredikhin
Institute of Solid State Physics
Email: aliv@issp.ac.ru
Ресей, ul. Akademika Osip’yana 2, Moscow oblast’, Chernogolovka, 142432
V. Kharton
Institute of Solid State Physics; Center for Research in Ceramics and Composite Materials (CICECO)
Email: aliv@issp.ac.ru
Ресей, ul. Akademika Osip’yana 2, Moscow oblast’, Chernogolovka, 142432; Aveiro, 3810-193