Dielectric Properties, Electrical Conductivity, and Relaxation Phenomena in Ferroelectric Bi₂WO₆

High oxide ion conductivity in Bi2MoO6 oxidation catalyst

“…The results presented here contrast significantly with those in ref. 13, which showed a low conductivity for both c and c' polymorphs which was comparable to that of our data for c'-Bi 2 MoO 6 sintered at 800 uC; however, the data in ref 13…”

“…The anionic conductivity of the bismuth-rich fluorite-like phases in the Bi 2 O 3 -MoO 3 system has been reported. 11,12 However, there is only one report 13 on the conductivity of Bi 2 MoO 6 . Fixed frequency (1 kHz) conductivity data on c and c' polymorphs, combined with transport number measurements, led to the conclusion that the c polymorph was an oxide ion conductor at low temperatures but became increasingly electronic above 300 uC, whereas the converse occurred for the c' polymorph which became increasingly electronic for temperatures below 700 uC.…”

“…Fixed frequency (1 kHz) conductivity data on c and c' polymorphs, combined with transport number measurements, led to the conclusion that the c polymorph was an oxide ion conductor at low temperatures but became increasingly electronic above 300 uC, whereas the converse occurred for the c' polymorph which became increasingly electronic for temperatures below 700 uC. 13 We became aware of this paper only at the conclusion of the present study and there are major discrepancies between the two sets of findings, as discussed below.…”

Controllable Ferroelastic Switching in Epitaxial Self-Assembled Aurivillius Nanobricks

“…28 Growth kinetics such as growth rate and growth temperature play a vital role in controlling the size of the self-assembled BiFeO 3 −CoFe 2 O 4 and BaTiO 3 − CoFe 2 O 4 nanostructures. 28,29 Bi 2 WO 6 (BWO), the simplest candidate among the Aurivillius group members, exhibits ferroelectric property with a rather large remanent polarization, 32 photocatalytic activity toward water splitting, 33,34 and the ability to degrade organic pollutants 35 because it has high ionic conductivity owing to its fast oxygen ion transport 36 and is a piezoelectric material with a high Curie temperature (T c ) and high piezoelectric coefficients. 37 The epitaxial thin-film growth on a single-crystal substrate is one of the effective approaches to discover new catalyst systems, leading to potential applications in efficient water splitting and degradation of organic pollutants.…”