Structure, surface and broadband impedance spectroscopy of Li4Ti5O12 based ceramics with Nb and Ta

A. F. Orliukas, K. Z. Fung, V. Venckute, V. Kazlauskiene, J. Miškinis, M. Lelis

研究成果: Article

3 引文 斯高帕斯(Scopus)

摘要

The structural investigation of the Li4Ti5O12 (LTO), Li4Ti4.95Nb0.05O12 (LTO + Nb) and Li4Ti4.95Ta0.05O12 (LTO + Ta) powders was conducted by X-ray diffraction (XRD) in temperature range (300-1270) K. These compounds have cubic spinel-type structure in the investigated temperature range. Ceramic samples were sintered for X-ray photoelectron spectroscopy (XPS) and impedance spectroscopy study. Binding energies of Ti 2p and O1s core levels XPS on the surfaces of the ceramics have been investigated at room temperature. Two and four probe voltmeter-ammeter methods were used for the measurements of electrical impedance in the frequency range 10 Hz-1 MHz. Coaxial waveguide technique was used for the investigation of impedance spectra in the frequency range from 1 MHz to 3 GHz. Electrical properties of the ceramics were studied in the temperature interval (300-780) K.

原文English
頁(從 - 到)34-41
頁數8
期刊Solid State Ionics
271
DOIs
出版狀態Published - 2015 三月

    指紋

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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