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Sodium self-diffusion coefficient in sodium silicate glass by quasielastic neutron scattering

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Zeitschrift für Physik B Condensed Matter

Abstract

Using pulsed neutrons of 19.8 Å wavelength a quasielastic line broadening as low as 0.03 μeV (FWHM) has been observed due to Na+ diffusion in the glass Na2O·2SiO2. From the linewidths a Na+ self-diffusion coefficient of 3.1·10−8 cm2/s at 420°C was obtained in excellent agreement with the diffusion coefficient determined for the same sample batch using22Na radioactive tracers. The experimental Q dependence of the quasielasic linewidths gives a hint for deviations from a purely random walk in an ionic glass.

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Authors and Affiliations

  1. Physikalische Chemie, Universität des Saarlandes, Im Stadtwald, D-66123, Saarbrücken, Germany

    R. Hempelmann

  2. Rutherford Appleton Laboratory, SIS, Chilton, OX11 0QX, (Didcot), Oxon, UK

    C. J. Carlile

  3. Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität, D-07745, Jena, Germany

    D. Beyer & Ch. Kaps

Authors
  1. R. Hempelmann
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  2. C. J. Carlile
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  3. D. Beyer
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  4. Ch. Kaps
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Hempelmann, R., Carlile, C.J., Beyer, D. et al. Sodium self-diffusion coefficient in sodium silicate glass by quasielastic neutron scattering. Z. Physik B - Condensed Matter 95, 49–53 (1994). https://doi.org/10.1007/BF01316842

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  • DOI: https://doi.org/10.1007/BF01316842

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