Details
| Original language | English |
|---|---|
| Pages (from-to) | 935-940 |
| Number of pages | 6 |
| Journal | Defect and Diffusion Forum |
| Volume | 194-199 |
| Publication status | Published - 2001 |
Abstract
Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3 composites was investigated with impedance and NMR spectroscopy in the temperature range from 140 K to 500 K. Impedance results for the nanocrystalline system differ drastically from those of the microcrystalline system and show an enhancement of the dc conductivity when adding the insulator B2O3 to the ionic conductor Li2O. 7Li NMR lineshape measurements confirm that this is due to an enhanced fraction of mobile ions in the interfacial regions between the conductor and the insulator. Activation energies obtained from the dc conductivity (0.95 eV) and the 7Li NMR relaxation rate T1-1 (0.29 eV) are independent of the composition of the composites.
Keywords
- Ball Milling, Ceramics, Composites, Impedance Spectroscopy, Interfacial Regions, Ionic Conductor, Nanocrystalline Materials, NMR Spectroscopy
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Radiation
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Defect and Diffusion Forum, Vol. 194-199, 2001, p. 935-940.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3
AU - Indris, S.
AU - Heitjans, P.
AU - Roman, H. E.
AU - Bunde, A.
PY - 2001
Y1 - 2001
N2 - Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3 composites was investigated with impedance and NMR spectroscopy in the temperature range from 140 K to 500 K. Impedance results for the nanocrystalline system differ drastically from those of the microcrystalline system and show an enhancement of the dc conductivity when adding the insulator B2O3 to the ionic conductor Li2O. 7Li NMR lineshape measurements confirm that this is due to an enhanced fraction of mobile ions in the interfacial regions between the conductor and the insulator. Activation energies obtained from the dc conductivity (0.95 eV) and the 7Li NMR relaxation rate T1-1 (0.29 eV) are independent of the composition of the composites.
AB - Li diffusion in nano- and microcrystalline (1-x)Li2O:xB2O3 composites was investigated with impedance and NMR spectroscopy in the temperature range from 140 K to 500 K. Impedance results for the nanocrystalline system differ drastically from those of the microcrystalline system and show an enhancement of the dc conductivity when adding the insulator B2O3 to the ionic conductor Li2O. 7Li NMR lineshape measurements confirm that this is due to an enhanced fraction of mobile ions in the interfacial regions between the conductor and the insulator. Activation energies obtained from the dc conductivity (0.95 eV) and the 7Li NMR relaxation rate T1-1 (0.29 eV) are independent of the composition of the composites.
KW - Ball Milling
KW - Ceramics
KW - Composites
KW - Impedance Spectroscopy
KW - Interfacial Regions
KW - Ionic Conductor
KW - Nanocrystalline Materials
KW - NMR Spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0035780694&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/ddf.194-199.935
DO - 10.4028/www.scientific.net/ddf.194-199.935
M3 - Article
AN - SCOPUS:0035780694
VL - 194-199
SP - 935
EP - 940
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
SN - 1012-0386
ER -