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- Title
Chemical Diffusion Coefficient of H[sub2]O in AB ([sub1-x])B'[subx]O([sub3-x/2])-Type Perovskites.
- Authors
Virkar, Anil V.; Baek, Hyun-Deok
- Abstract
Many oxygen-deficient oxide perovskites are oxygen ion conductors in a dry environment. However, in a humid atmosphere, they absorb water to fill up oxygen vacancies, release quasi-free protons into the structure, and thereby become proton conductors. Absorption of water requires the transport of both protons and oxygen ions. This effectively leads to the transport of H[sub 2]O under its chemical potential gradient. The present manuscript develops relationships between the chemical diffusion coefficient of H[sub 2]O and the diffusion coefficients of protons and oxygen vacancies with an emphasis on the role of solution thermodynamics.
- Subjects
PEROVSKITE; DIFFUSION; WATER
- Publication
Journal of the American Ceramic Society, 2002, Vol 85, Issue 12, p3059
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1151-2916.2002.tb00579.x