Details
| Original language | English |
|---|---|
| Pages (from-to) | Y6.6.1-Y6.6.10 |
| Journal | Materials Research Society Symposium - Proceedings |
| Volume | 676 |
| Publication status | Published - 2001 |
| Event | Synthesis, Functional Properties and Applications of Nanostructures - San Francisco, CA, United States Duration: 17 Apr 2001 → 20 Apr 2001 |
Abstract
Diffusion and ionic conduction in nanocrystalline ceramics, both monophase and composite, was studied by NMR relaxation and NMR lineshape as well as impedance spectroscopy. Measurements were mainly done on Li ion conductors prepared by high-energy ball milling. It was possible to discriminate between mobile ions in the interfacial regions and immobile ions in the grains. In general the diffusivity and conductivity are enhanced in the nanocrystalline monophase system as compared to the microcrystalline one, e.g. by about four orders of magnitude in the case of CaF2. An exception is, e.g., Li2O where the nano- and microcrystalline forms have similar conductivities. However, when the nanocrystalline insulator B2O3 is added to nanocrystalline Li2O the conductivity of the composite increases whereas it decreases in the corresponding microcrystalline system.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materials Research Society Symposium - Proceedings, Vol. 676, 2001, p. Y6.6.1-Y6.6.10.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Diffusion and ionic conduction in nanocrystalline ceramics
AU - Heitjans, Paul
AU - Indris, Sylvio
N1 - Funding Information: We are grateful to the Deutsche Forschungsgemeinschaft for financial support.
PY - 2001
Y1 - 2001
N2 - Diffusion and ionic conduction in nanocrystalline ceramics, both monophase and composite, was studied by NMR relaxation and NMR lineshape as well as impedance spectroscopy. Measurements were mainly done on Li ion conductors prepared by high-energy ball milling. It was possible to discriminate between mobile ions in the interfacial regions and immobile ions in the grains. In general the diffusivity and conductivity are enhanced in the nanocrystalline monophase system as compared to the microcrystalline one, e.g. by about four orders of magnitude in the case of CaF2. An exception is, e.g., Li2O where the nano- and microcrystalline forms have similar conductivities. However, when the nanocrystalline insulator B2O3 is added to nanocrystalline Li2O the conductivity of the composite increases whereas it decreases in the corresponding microcrystalline system.
AB - Diffusion and ionic conduction in nanocrystalline ceramics, both monophase and composite, was studied by NMR relaxation and NMR lineshape as well as impedance spectroscopy. Measurements were mainly done on Li ion conductors prepared by high-energy ball milling. It was possible to discriminate between mobile ions in the interfacial regions and immobile ions in the grains. In general the diffusivity and conductivity are enhanced in the nanocrystalline monophase system as compared to the microcrystalline one, e.g. by about four orders of magnitude in the case of CaF2. An exception is, e.g., Li2O where the nano- and microcrystalline forms have similar conductivities. However, when the nanocrystalline insulator B2O3 is added to nanocrystalline Li2O the conductivity of the composite increases whereas it decreases in the corresponding microcrystalline system.
UR - http://www.scopus.com/inward/record.url?scp=0035742246&partnerID=8YFLogxK
U2 - 10.1557/proc-676-y6.6
DO - 10.1557/proc-676-y6.6
M3 - Conference article
AN - SCOPUS:0035742246
VL - 676
SP - Y6.6.1-Y6.6.10
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
SN - 0272-9172
T2 - Synthesis, Functional Properties and Applications of Nanostructures
Y2 - 17 April 2001 through 20 April 2001
ER -