Diffusion in Nanocrystalline Ion Conductors Studied by Solid State NMR and Impedance Spectroscopy |
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| Journal | Defect and Diffusion Forum (Volumes 283 - 286) |
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| Volume | Diffusion in Solids and Liquids IV |
| Edited by | Andreas Öchsner, Graeme E. Murch and Ali Shokuhfar |
| Pages | 705-715 |
| DOI | 10.4028/www.scientific.net/DDF.283-286.705 |
| Citation | Paul Heitjans et al., 2009, Defect and Diffusion Forum, 283-286, 705 |
| Online since | March, 2009 |
| Authors | Paul Heitjans, Martin Wilkening |
| Keywords | BaF2, CaF2, Composites, Conductivity, F Diffusion, Li, LiF, Lineshape, LiTaO3, NMR Relaxation |
| Abstract | Materials with an average particle size of less than about 50 nm often show new or at least enhanced physical properties. In many cases nanocrystalline ionic conductors exhibit a high increase of cation, e. g. Li+, or anion, e. g. F−, diffusivity. In the present contribution we review recent studies on ion dynamics in nanocrystalline ion conductors, both single-phase systems and composites, being prepared by high-energy ball milling. These include, e.g., LiTaO3, Li2O:Al2O3, LiF:Al2O3, BaF2, CaF2, BaF2:CaF2 and (BaF2:CaF2):Al2O3. Dynamic properties were probed by 7Li and/or 19F NMR line shape and relaxation as well as ion conductivity measurements. |
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