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Research finds grain-boundary diffusion is faster with higher activation enthalpy in ionic space-charge layers, suggesting implications for ion transport in materials.
Faster diffusion of cations along grain boundaries is reported in the literature for a variety of acceptor-doped AB O 3 perovskite-type oxides. The ratio r of the activation enthalpy of grain-boundary diffusion...
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Kielgas et al. (2026) studied this question.
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