Diffusion in amorphous LiNbO3 studied by 7Li NMR - Comparison with the nano- and microcrystalline material

Martin Wilkening, Detlef Bork, Sylvio Indris, Paul Heitjans

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Lithium diffusion in amorphous LiNbO3, synthesized by a sol-gel process, was investigated by temperature- and frequency-dependent 7Li NMR experiments. 7Li spin-lattice relaxation rates T1-1 and 7Li nuclear magnetic resonance spectra, in particular line shapes and motional narrowing of the central line, were measured. The results are discussed in comparison with those on nano- and microcrystalline LiNbO3 investigated by us earlier. The Li diffusivity in the amorphous material is much higher than in the microcrystalline one and can be described by practically the same diffusion parameters as in nanocrystalline LiNbO3. This suggests that the diffusion pathways in amorphous LiNbO3 and in the interfacial regions of nanocrystalline LiNbO3 have similar structures.

Original languageEnglish
Pages (from-to)3246-3251
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume4
Issue number14
DOIs
Publication statusPublished - 20 Jul 2002
Externally publishedYes

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Nuclear magnetic resonance
nuclear magnetic resonance
amorphous materials
sol-gel processes
spin-lattice relaxation
diffusivity
line shape
lithium
Spin-lattice relaxation
Lithium
Sol-gel process
lithium niobate
temperature
Experiments
Temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Diffusion in amorphous LiNbO3 studied by 7Li NMR - Comparison with the nano- and microcrystalline material. / Wilkening, Martin; Bork, Detlef; Indris, Sylvio; Heitjans, Paul.

In: Physical Chemistry Chemical Physics, Vol. 4, No. 14, 20.07.2002, p. 3246-3251.

Research output: Contribution to journalArticleResearchpeer-review

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