Please use this identifier to cite or link to this item: https://apo.ansto.gov.au/dspace/handle/10238/10518
Title: Synthesis and characterisation of new Bi (III)-containing apatite-type oxide ion conductors: the influence of lone pairs
Authors: Tate, ML
Fuller, CA
Avdeev, M
Brand, HEA
McIntyre, GJ
Evans, IR
Keywords: Electric conductivity
Oxides
Cations
Fluorite
Apatites
Silicates
X-ray diffraction
Neutron diffraction
Solid electrolytes
Issue Date: 4-Sep-2017
Publisher: Royal Society of Chemistry
Citation: Tate, M. L., Fuller, C. A., Avdeev, M., Brand, H. E. A., McIntyre, G. J., & Evans, I. R. (2017). Synthesis and characterisation of new Bi (III)-containing apatite-type oxide ion conductors: the influence of lone pairs. Dalton Transactions, 46(37), 12494-12499. doi:10.1039/C7DT02871G
Abstract: Lone-pair cations are known to enhance oxide ion conductivity in fluorite- and Aurivillius-type materials. Among the apatite-type phases, the opposite trend is found for the more widely studied silicate oxide ion conductors, which exhibit a dramatic decrease in conductivity on Bi(III) incorporation. In this work, the influence of lone-pair cations on the properties of apatite-type germanate oxide ion conductors has been investigated by preparing and characterising seven related compositions with varying Bi(III) content, by X-ray and neutron powder diffraction and impedance spectroscopy. All materials are very good oxide ion conductors (with conductivities of up to 1.29 × 10−2 S cm−1 at 775 °C). Increasing Bi(III) content leads to increases in conductivity by up to an order of magnitude, suggesting significant differences in the oxide-ion conduction mechanisms between lone-pair-containing apatite-type germanate and silicate solid electrolytes. © The Royal Society of Chemistry 2017
URI: https://doi.org/10.1039/C7DT02871G
https://apo.ansto.gov.au/dspace/handle/10238/10518
ISSN: 1477-9234
Appears in Collections:Journal Articles

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