Regensburg 2010 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 26: Poster Session

MM 26.53: Poster

Dienstag, 23. März 2010, 14:45–16:30, Poster C

Oxygen and silicon diffusion in mixed cation silicate glasses — •Kirsten Sunder and Hartmut Bracht — Institut für Materialphysik, Wilhelm-Klemm-Straße 10, WWU Münster

The impact of alkali (A) and alkaline-earth (M) ions on oxygen (O) and silicon (Si) diffusion in mixed cation silicate glasses of the composition aA2O-bMO-4SiO2 was investigated. In particular, the dependence of network former diffusion on the type of cations (A=Li,Na,K; M=Mg,Ca,K), the concentration of non-bridging oxygens (a=0.5,1,1.25; b=2a), and the alkali to alkaline-earth ratio (a=0,1,1.5; b=3-a) was determined. This study together with the work on the cation mobility [F.V. Natrup et al., Solid State Ionics 180 (2009) p. 109] provides a comprehensive understanding of the dynamics in this glass system.