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

Martin Wilkening*, Detlef Bork, Sylvio Indris, Paul Heitjans

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

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.

Originalspracheenglisch
Seiten (von - bis)3246-3251
Seitenumfang6
FachzeitschriftPhysical Chemistry, Chemical Physics
Jahrgang4
Ausgabenummer14
DOIs
PublikationsstatusVeröffentlicht - 20 Jul 2002
Extern publiziertJa

ASJC Scopus subject areas

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

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