Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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On the Chemical Diffusion Coefficient of H2O in AB1-xBxO(3-x/2)-type Perobskites

  • Baek, Hyun-Deok (Department of Materials Science and Engineering, Hong-ik University) ;
  • Virkar, Anil V. (Department of Materials Science and Engineering, 122S Central Campus drive University of Utah)
  • Published : 2003.09.01
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Abstract

In proton-conducting perovskites, oxygen ions and protons make a diffusion pair for a chemical diffusion and thus lead to the transport of $H_2O$ under its chemical potential gradient. The present manuscript develops relationships between the chemical diffusion coefficient of $H_2O$ 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 : equation omitted and equation omitted.

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References

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