Oxygen Uptake and Diffusion in Mayenite

Martin Kilo; Sathya Swaroop; Martin Lerch

doi:10.4028/www.scientific.net/DDF.289-292.511

Paper Titles

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Influence of the Processing Parameters on the Nature of Oxides Formed on Sintered Stainless Steels during High-Temperature Exposures
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Establishment of Thermally Grown Oxides upon the Early Oxidation Stages of Ni20Cr and Ni30Cr
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An Insight on the Influence of Ion Implantation on the Pitting Corrosion Resistance of AISI 430 Stainless Steel
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Oxygen Uptake and Diffusion in Mayenite
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Strong-Gravity Effect on Twinned Y₁Ba₂Cu₃O_7-x Single Crystal
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Study of Oxygen Diffusion in Polycrystalline ZnO by SIMS
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Oxygen and Silicon Diffusion in Silica under Varying Ambient Conditions
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The Oxide Scale Growth Mechanism on Fe20Cr5Al+RE Alloy in SO₂+O₂
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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vols. 289-292Oxygen Uptake and Diffusion in Mayenite

Oxygen Uptake and Diffusion in Mayenite

Abstract:

Oxygen uptake and oxygen diffusion in Mayenite (Ca12Al14O33) were investigated using the stable tracer 18O2. Mayenite contains one intrinsic, highly mobile oxygen anion. It was shown that for high temperatures (above 700 °C), the diffusion goes through a interstitialcy mechanism, where the interstitial oxygen anion knocks out a lattice oxygen anion. The activation enthalpy for this process is around 0.9 eV, suggesting that the ionic migration is very fast.