Diffusion Kinetics Analysis of Cation Diffusion in YSZ and LSGM

Abstract

In this paper, we discuss different possible cation diffusion mechanisms in YSZ and LSGM. Monte Carlo simulations are also reported of tracer diffusivities in LSGM for a postulated cluster mechanism. These simulations extend earlier simulations on un-doped material. The limits of the ratio of the diffusivities are consistent with experimental tracer diffusion findings over a wide range of cation-vacancy exchange frequencies. We also develop relationships between the phenomenological coefficients and use these relationships to predict possible demixing and interdiffusion experimental outcomes.

Interdiffusion in Ionic Compounds

“…This is again an effective way to visualize the corresponding vacancy wind effect in insulating ionic compounds with cations having different charges. We can see that the results for the vacancy probability are similar to what has been seen for the standard interdiffusion in alloys [18].…”