TY - GEN A1 - Welter, T. T1 - Glass structures with low helium and hydrogen permeability N2 - An efficient energy provision using fuel cells is linked to effecitve hydrogen storage capabilities. Because of its low intrinsic hydrogen permeability, glass has a huge potential in modern concepts of hydrogen storage. Previous studies on oxidic glasses showed an empirical connection between glass composition and gas permeation, which was mainly derived from the behavior of silica glass. In this study we focus on the relationship between topologic (free volume; network polymerization) and thermodynamic (configurational entropy) parameters. The comparison of three glasses within the meta (earth-) alkaline alumino silicate system to silica glass shows that an increase of the atomic packing factor (APF) does not necessarily decrease the permeability. Furthermore, the results suggest a connection between ΔCp at Tg and hydrogen permeability of the glass. All experiments were performed assuming that chemical hydrogen solubiltity in glass is negligible at temperatures well below the glass transition temperature. T2 - 91. Glastechnische Tagung CY - Weimar, Germany DA - 29.05.2017 KW - Hydrogen permeability KW - Glass composition KW - Atomic packing factor KW - Configurational entropy KW - Diffusion coefficient PY - 2017 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/40488 AN - OPUS4-40488 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany