Details
| Original language | English |
|---|---|
| Pages (from-to) | 97-108 |
| Number of pages | 12 |
| Journal | European Physical Journal: Special Topics |
| Volume | 161 |
| Issue number | 1 |
| Publication status | Published - Jul 2008 |
Abstract
In the present paper we review experimental studies on ion transport and diffusion in nanocrystalline andglassy ceramics of LiNbO3 and LiAlSi2O6 and report on new ones on LiBO2 using the measurement of dc conductivities and 7Li nuclear magnetic resonance spin-lattice relaxation rates. Nanocrystalline ceramics, with an average particle size of 50 nm and less, often show an enhanced diffusivity compared to their microcrystalline (μm-sized) counterparts. This increase is due to the large fraction of atoms or ions located in the interfacial regions. A key for understanding the structure-mobility relations in nanocrystalline ceramics is to clarify themicroscopic structure of the grain boundaries and also the morphology of the grain boundary network. In this contextit is useful to study not only the ion transport properties of the nano- and microcrystalline materials but also thoseof the corresponding glassy forms. Such comparative studies gave strong evidence that in some cases the interfacial regions are of amorphous structure. For example, this was recently shown for nanocrystalline lithium niobate which was prepared by high-energy ball milling.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: European Physical Journal: Special Topics, Vol. 161, No. 1, 07.2008, p. 97-108.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ion transport and diffusion in nanocrystalline and glassy ceramics
AU - Heitjans, P.
AU - Tobschall, E.
AU - Wilkening, M.
PY - 2008/7
Y1 - 2008/7
N2 - In the present paper we review experimental studies on ion transport and diffusion in nanocrystalline andglassy ceramics of LiNbO3 and LiAlSi2O6 and report on new ones on LiBO2 using the measurement of dc conductivities and 7Li nuclear magnetic resonance spin-lattice relaxation rates. Nanocrystalline ceramics, with an average particle size of 50 nm and less, often show an enhanced diffusivity compared to their microcrystalline (μm-sized) counterparts. This increase is due to the large fraction of atoms or ions located in the interfacial regions. A key for understanding the structure-mobility relations in nanocrystalline ceramics is to clarify themicroscopic structure of the grain boundaries and also the morphology of the grain boundary network. In this contextit is useful to study not only the ion transport properties of the nano- and microcrystalline materials but also thoseof the corresponding glassy forms. Such comparative studies gave strong evidence that in some cases the interfacial regions are of amorphous structure. For example, this was recently shown for nanocrystalline lithium niobate which was prepared by high-energy ball milling.
AB - In the present paper we review experimental studies on ion transport and diffusion in nanocrystalline andglassy ceramics of LiNbO3 and LiAlSi2O6 and report on new ones on LiBO2 using the measurement of dc conductivities and 7Li nuclear magnetic resonance spin-lattice relaxation rates. Nanocrystalline ceramics, with an average particle size of 50 nm and less, often show an enhanced diffusivity compared to their microcrystalline (μm-sized) counterparts. This increase is due to the large fraction of atoms or ions located in the interfacial regions. A key for understanding the structure-mobility relations in nanocrystalline ceramics is to clarify themicroscopic structure of the grain boundaries and also the morphology of the grain boundary network. In this contextit is useful to study not only the ion transport properties of the nano- and microcrystalline materials but also thoseof the corresponding glassy forms. Such comparative studies gave strong evidence that in some cases the interfacial regions are of amorphous structure. For example, this was recently shown for nanocrystalline lithium niobate which was prepared by high-energy ball milling.
UR - http://www.scopus.com/inward/record.url?scp=45849113307&partnerID=8YFLogxK
U2 - 10.1140/epjst/e2008-00753-4
DO - 10.1140/epjst/e2008-00753-4
M3 - Article
AN - SCOPUS:45849113307
VL - 161
SP - 97
EP - 108
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
SN - 1951-6355
IS - 1
ER -