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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. (2017) An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals. IOP Conference Series: Materials Science and Engineering, 169 (1). ISSN 1757-8981. E-ISSN 1757-899X. (doi:10.1088/1757-899X/169/1/012015)

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.

Item Type: Article
DOI/Identification number: 10.1088/1757-899X/169/1/012015
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Silvia Ramos
Date Deposited: 05 Dec 2017 12:21 UTC
Last Modified: 17 Jul 2019 09:59 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/64978 (The current URI for this page, for reference purposes)
Ramos, S.: https://orcid.org/0000-0003-2725-7706
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