Abstract
Infrared absorption spectra have been used to characterize OH− and OD− ions at the surface and the bulk of undoped CaO, lithium doped CaO, and SrO crystals. Diffusion of deuterons from D2O vapor into these crystals was performed at elevated temperatures. Diffusion coefficients were obtained to be D (CaO) = 3 ⊠ 10−6 cm2/sec at 1773 K and D (SrO) = 4 ⊠ 10−7 cm2/sec at 1523 K. For the doped CaO crystal with lithium concentration of 310 ppm, the diffusion coefficient was measured to be D (CaO:Li) = 4 ⊠ 10−7 cm2/sec at 1473 K and the activation energy in the Arrhenius equation was estimated to be 1.7 eV.
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Park, J.L., González, R. Infrared absorption spectroscopy of hydrogen and deuterium in CaO and SrO crystals. Journal of Materials Research 4, 224–231 (1989). https://doi.org/10.1557/JMR.1989.0224
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DOI: https://doi.org/10.1557/JMR.1989.0224