Diffusion in Yb2O3–Al2O3–SiO2 glass

in: Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B (2011)
Unger, Sonja; Dellith, Jan; Scheffel, Andy; Kirchhof, Johannes
The diffusion of aluminium and ytterbium in Yb2O3–Al2O3–SiO2 glasses has been investigated between 1700 and 2000°C with concentrations of up to 3 mol% Al2O3 and 0·8 mol% Yb2O3. The diffusion coefficient of aluminium is independent of the ytterbium concentration and can be described by an Arrhenius function with a constant preexponential factor, D0=101·48 cm2s−1, and a concentration dependent activation energy, E=(497−47cAl2O3 0·41) kJ mol−1 which decreases with increasing molar concentration of Al2O3. For concentrations greater than 0·5 mol% Al2O3, the diffusion coefficient of ytterbium is virtually the same as that for aluminium. At aluminium concentrations lower than 0·5 mol% Al2O3 and ytterbium concentrations lower than 0·1 mol% Yb2O3, ytterbium diffuses independently of aluminium with a modified diffusion coefficient, with a pre-exponential factor D0=100·48 cm2s−1, and an activation energy E=424 kJ mol−1.

DOI: Array

Third party cookies & scripts

This site uses cookies. For optimal performance, smooth social media and promotional use, it is recommended that you agree to third party cookies and scripts. This may involve sharing information about your use of the third-party social media, advertising and analytics website.
For more information, see privacy policy and imprint.
Which cookies & scripts and the associated processing of your personal data do you agree with?

You can change your preferences anytime by visiting privacy policy.