An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals

A. V. Chadwick, D. M. Pickup, S. Ramos, G. Cibin, N. Tapia-Ruiz, S. Breuer, D. Wohlmuth, M. Wilkening

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Previous work has shown that nanocrystalline samples of lithium tantalate and titanate prepared by high-energy milling show unusually high lithium ion conductivity. Here, we report an X-ray absorption spectroscopy (XAS) study at the Ti K-edge and the Ta L3 edge of samples that have been milled for various lengths of time. For both systems the results show that milling creates amorphous material whose quantity increases with the milling time. The more extensive data for the tantalate shows that milling for only 30 minutes generates ∼25% amorphous content in the sample. The content rises to ∼60% after 16 hours. It is suggested that it is the motion of the lithium ions through the amorphous content that provides the mechanism for the high ionic conductivity.

Original languageEnglish
Article number012015
JournalIOP Conference Series / Materials Science and Engineering
Volume169
Issue number1
DOIs
Publication statusPublished - 16 Feb 2017
Externally publishedYes

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X ray absorption spectroscopy
Lithium
Nanocrystals
Ions
Mechanical alloying
Ionic conductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals. / Chadwick, A. V.; Pickup, D. M.; Ramos, S.; Cibin, G.; Tapia-Ruiz, N.; Breuer, S.; Wohlmuth, D.; Wilkening, M.

In: IOP Conference Series / Materials Science and Engineering, Vol. 169, No. 1, 012015, 16.02.2017.

Research output: Contribution to journalArticleResearchpeer-review

Chadwick, A. V. ; Pickup, D. M. ; Ramos, S. ; Cibin, G. ; Tapia-Ruiz, N. ; Breuer, S. ; Wohlmuth, D. ; Wilkening, M. / An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals. In: IOP Conference Series / Materials Science and Engineering. 2017 ; Vol. 169, No. 1.
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