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This paper describes measurements of the chemical diffusion coefficient for oxygen by focusing on the assumptions underlying the potential-step technique. Possible deviations of experimental data from the idealised solutions to Fick's second law, and means of extracting information if such behaviour is detectable, are explored. Results show that diffusion coefficients are best evaluated from long-time behaviour. An indication of whether diffusion is limited by grain body transport or by diffusion throughout the sample is obtained.

Additional information

Authors: SUNDE S, SINTEF Metallurgy, Trondheim (NO);MÜLLER F R, SINTEF Metallurgy, Trondheim (NO);NISANCIOGLU K, Norwegian Institute of Technology, Department of Electrochemistry, Trondheim (NO)
Bibliographic Reference: Paper presented: 185th Meeting of the Electrochemical Society on Heat Exchangers, Miami (US), October 2-7, 1994
Availability: Available from (1) as Paper EN 38074 ORA
Record Number: 199410094 / Last updated on: 1994-11-28
Original language: en
Available languages: en