Oxygen self‐diffusion in MgAl 2 O 4 single crystals was investigated by annealing the samples in 18 O enriched gas at 98 kPa (1 atm) and measuring the tracer concentration profiles using a proton activation technique. The diffusion coefficients in the range 1625 to 1925 K for stoichiometric crystals are represented by: Oxygen diffusivity in alumina‐rich nonstoichiometric samples is higher than in stoichiometric samples.
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Reddy et al. (1981) studied this question.
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