Stability of tungsten-doped δ-Bi3YO6

Anna Borowska-Centkowska , Marzena Leszczyńska-Redek , Wojciech Wróbel , Marcin Małys , S. Hull , Franciszek Krok , I. Abrahams

Abstract

The stability of bismuth yttrium oxide doped with tungsten, Bi3Y1−xWxO6+3x/2, on annealing in air for up to 1000 h at 650 °C was investigated using a.c. impedance spectroscopy and neutron diffraction. Compositions up to x = 0.2 all show some degree of conductivity decay, but only in the case of the x = 0.10 composition is this decay relatively small and not associated with a significant structural change. Details of the short range structure of this composition were investigated by reverse Monte Carlo modelling of total neutron scattering data and again reveal no significant changes prior to and post annealing. A preference for 〈100〉 oxide ion vacancy pair alignment is found in the structure, consistent with models for oxide ion conduction in these systems. Additionally, the total scattering analysis reveals a preferred vacancy association with the W6+ cations, which adopt a four coordinate geometry in this system.

Author Anna Borowska-Centkowska (FP / SSID)
Anna Borowska-Centkowska,,
- Solid State Ionics Division
, Marzena Leszczyńska-Redek (FP / SSID)
Marzena Leszczyńska-Redek,,
- Solid State Ionics Division
, Wojciech Wróbel (FP / SSID)
Wojciech Wróbel,,
- Solid State Ionics Division
, Marcin Małys (FP / SSID)
Marcin Małys,,
- Solid State Ionics Division
, S. Hull - [ISIS Facility]
S. Hull,,
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, Franciszek Krok (FP / SSID)
Franciszek Krok,,
- Solid State Ionics Division
, I. Abrahams - [School of Biological and Chemical Sciences Queen Mary University of London]
I. Abrahams,,
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Journal seriesSolid State Ionics, ISSN 0167-2738, e-ISSN 1872-7689, (N/A 70 pkt)
Issue year2020
Vol345
ASJC Classification1600 General Chemistry; 2500 General Materials Science; 3104 Condensed Matter Physics
DOIDOI:10.1016/j.ssi.2019.115173
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 31-01-2020, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.952; WoS Impact Factor: 2018 = 2.886 (2) - 2018=2.68 (5)
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