Details
| Original language | English |
|---|---|
| Pages (from-to) | 65-69 |
| Number of pages | 5 |
| Journal | Solid State Ionics |
| Volume | 184 |
| Issue number | 1 |
| Early online date | 28 Sept 2010 |
| Publication status | Published - 3 Mar 2011 |
Abstract
Highly pure nanocrystalline BaLiF3 (space group Pm3̄m, inverse perovskite structure) with a mean crystallite size of the order of 30 nm was mechanosynthesized from the binary fluorides LiF and BaF2. The source materials with μm-sized crystallites were treated in a planetary mill for several hours at ambient temperature. The product is characterized by X-ray diffraction and transmission electron microscopy. Its ionic conductivity was probed by solid state impedance spectroscopy. For comparison, a coarse-grained sample of BaLiF3 with a mean crystallite diameter in the μm range was synthesized by conventional high-temperature ceramic synthesis. The ionic conductivity (dc) of the mechanosynthesized nanocrystalline sample, which is characterized by a large fraction of interfacial regions, is by about three orders of magnitude (T = 570 K) larger than that of the conventionally prepared one. Preliminary temperature-variable 7Li NMR spectra provide first insights into the Li dynamics of the samples studied.
Keywords
- Conductivity, Impedance spectroscopy, Mechanochemistry, Milling, Nanocrystalline, Solid state NMR
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Solid State Ionics, Vol. 184, No. 1, 03.03.2011, p. 65-69.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ion conduction and dynamics in mechanosynthesized nanocrystalline BaLiF3
AU - Düvel, André
AU - Wilkening, M.
AU - Wegner, S.
AU - Feldhoff, Armin
AU - Šepelák, V.
AU - Heitjans, Paul
N1 - Funding Information: We gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft ( SPP 1415 ).
PY - 2011/3/3
Y1 - 2011/3/3
N2 - Highly pure nanocrystalline BaLiF3 (space group Pm3̄m, inverse perovskite structure) with a mean crystallite size of the order of 30 nm was mechanosynthesized from the binary fluorides LiF and BaF2. The source materials with μm-sized crystallites were treated in a planetary mill for several hours at ambient temperature. The product is characterized by X-ray diffraction and transmission electron microscopy. Its ionic conductivity was probed by solid state impedance spectroscopy. For comparison, a coarse-grained sample of BaLiF3 with a mean crystallite diameter in the μm range was synthesized by conventional high-temperature ceramic synthesis. The ionic conductivity (dc) of the mechanosynthesized nanocrystalline sample, which is characterized by a large fraction of interfacial regions, is by about three orders of magnitude (T = 570 K) larger than that of the conventionally prepared one. Preliminary temperature-variable 7Li NMR spectra provide first insights into the Li dynamics of the samples studied.
AB - Highly pure nanocrystalline BaLiF3 (space group Pm3̄m, inverse perovskite structure) with a mean crystallite size of the order of 30 nm was mechanosynthesized from the binary fluorides LiF and BaF2. The source materials with μm-sized crystallites were treated in a planetary mill for several hours at ambient temperature. The product is characterized by X-ray diffraction and transmission electron microscopy. Its ionic conductivity was probed by solid state impedance spectroscopy. For comparison, a coarse-grained sample of BaLiF3 with a mean crystallite diameter in the μm range was synthesized by conventional high-temperature ceramic synthesis. The ionic conductivity (dc) of the mechanosynthesized nanocrystalline sample, which is characterized by a large fraction of interfacial regions, is by about three orders of magnitude (T = 570 K) larger than that of the conventionally prepared one. Preliminary temperature-variable 7Li NMR spectra provide first insights into the Li dynamics of the samples studied.
KW - Conductivity
KW - Impedance spectroscopy
KW - Mechanochemistry
KW - Milling
KW - Nanocrystalline
KW - Solid state NMR
UR - http://www.scopus.com/inward/record.url?scp=79952316524&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2010.08.025
DO - 10.1016/j.ssi.2010.08.025
M3 - Article
AN - SCOPUS:79952316524
VL - 184
SP - 65
EP - 69
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 1
ER -