Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 65-69 |
| Seitenumfang | 5 |
| Fachzeitschrift | Solid State Ionics |
| Jahrgang | 184 |
| Ausgabenummer | 1 |
| Frühes Online-Datum | 28 Sept. 2010 |
| Publikationsstatus | Veröffentlicht - 3 März 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.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Allgemeine Chemie
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: Solid State Ionics, Jahrgang 184, Nr. 1, 03.03.2011, S. 65-69.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › 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 -