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On the Chemical Diffusion Coefficient of H2O in AB(1-x)B'Xo(3-X/2)-type PerovskitesOn the Chemical Diffusion Coefficient of H2O in AB(1-x)B'Xo(3-X/2)-type Perovskites
- Other Titles
- On the Chemical Diffusion Coefficient of H2O in AB(1-x)B'Xo(3-X/2)-type Perovskites
- Authors
- Hyun-Deok Baek; anil V. Virkdar
- Issue Date
- 2003
- Publisher
- 한국세라믹학회
- Keywords
- Chemical diffusion coefficient; degree of hydration; thermodynamic factor perovskite; 1.IntroductionMany oxide perovskites when doped on the B-site with a lower valent ion become proton conductors in water-containing atmospheres1-4). Doping with a lo; Chemical diffusion coefficient; degree of hydration; thermodynamic factor perovskite; 1.IntroductionMany oxide perovskites when doped on the B-site with a lower valent ion become proton conductors in water-containing atmospheres1-4). Doping with a lo
- Citation
- 한국세라믹학회지, v.40, no.9, pp.2 - 2
- Journal Title
- 한국세라믹학회지
- Volume
- 40
- Number
- 9
- Start Page
- 2
- End Page
- 2
- ISSN
- 1229-7801
- Abstract
- In proton-conducting perovskites, oxygen ions and protons make a diffusion pair for a chemical diffusion and thus lead to the transport of H2O under its chemical potential gradient. The present manuscript develops relationships between the chemical diffusion coefficient of H2O and the diffusion coefficients of protons and oxygen vacancies with an emphasis on the thermodynamic behavior of the oxygen vacancies. Depending on the degree of hydration X, two different expressions of the chemical diffusion coefficient were obtained: as X 0, and as X 1.
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