Details
| Original language | English |
|---|---|
| Pages (from-to) | 5412-5416 |
| Number of pages | 5 |
| Journal | Journal of Materials Chemistry |
| Volume | 18 |
| Issue number | 44 |
| Publication status | Published - 2008 |
Abstract
We report on the fluorine diffusivity in nanocrystalline BaF2 and CaF2 as well as in BaF2:CaF2 composites prepared by high-energy ball milling. Mechanical treatment of polycrystalline BaF2 together with CaF2 results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm -1 at 450 K. X-ray diffraction and 19F magic angle spinning NMR measurements at extraordinary high spinning speeds reveal that this can be explained inter alia by the interplay of structural disorder and the formation of a mixed (Ba,Ca)F2 phase.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- Materials Chemistry
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In: Journal of Materials Chemistry, Vol. 18, No. 44, 2008, p. 5412-5416.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Anion diffusivity in highly conductive nanocrystalline BaF 2:CaF2 composites prepared by high-energy ball milling
AU - Ruprecht, Benjamin
AU - Wilkening, Martin
AU - Steuernagel, Stefan
AU - Heitjans, Paul
PY - 2008
Y1 - 2008
N2 - We report on the fluorine diffusivity in nanocrystalline BaF2 and CaF2 as well as in BaF2:CaF2 composites prepared by high-energy ball milling. Mechanical treatment of polycrystalline BaF2 together with CaF2 results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm -1 at 450 K. X-ray diffraction and 19F magic angle spinning NMR measurements at extraordinary high spinning speeds reveal that this can be explained inter alia by the interplay of structural disorder and the formation of a mixed (Ba,Ca)F2 phase.
AB - We report on the fluorine diffusivity in nanocrystalline BaF2 and CaF2 as well as in BaF2:CaF2 composites prepared by high-energy ball milling. Mechanical treatment of polycrystalline BaF2 together with CaF2 results in a nanocrystalline composite with an unexpectedly high dc conductivity of about 0.1 mS cm -1 at 450 K. X-ray diffraction and 19F magic angle spinning NMR measurements at extraordinary high spinning speeds reveal that this can be explained inter alia by the interplay of structural disorder and the formation of a mixed (Ba,Ca)F2 phase.
UR - http://www.scopus.com/inward/record.url?scp=55349122542&partnerID=8YFLogxK
U2 - 10.1039/b811453f
DO - 10.1039/b811453f
M3 - Article
AN - SCOPUS:55349122542
VL - 18
SP - 5412
EP - 5416
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 44
ER -