Interfacial proton conduction in high-dielectric-constant spinel-perovskite NiFe2O4–LaFeO3 nanocomposite probed by impedimetric humidity sensing

The impedimetric humidity sensing is used to establish the interfacial proton conduction in spinel-perovskite NiFe2O4–2LaFeO3 (NFO-2LFO) nanocomposite that exhibited a contrasting combination of high dielectric constant and high AC conductivity. The inter-grain/grain boundary resistance of NFO-2LFO...

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Bibliographic Details
Published inCeramics international Vol. 48; no. 21; pp. 32536 - 32539
Main Authors Jesica Anjeline, C., Lakshminarasimhan, N.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2022
Subjects
B. Nanocomposites
C. Impedance
C. Ionic conductivity
E. Sensors
C. Ionic conductivity
E. Sensors
B. Nanocomposites
C. Impedance
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Summary:The impedimetric humidity sensing is used to establish the interfacial proton conduction in spinel-perovskite NiFe2O4–2LaFeO3 (NFO-2LFO) nanocomposite that exhibited a contrasting combination of high dielectric constant and high AC conductivity. The inter-grain/grain boundary resistance of NFO-2LFO exhibited a systematic decrease with increasing relative humidity (RH) revealing humidity-dependent proton conduction that occurs primarily at the interfaces than at intra-grain/bulk regions. The observed proton conduction at the grain boundaries/interfacial regions can be due to the change in the polarization of the space charge layers. [Display omitted]
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2022.07.217