High-Insulating Nature Induced by the Effect of Nickel Doping in (Ba0.7La0.3)(Ti1−xNix)O3 Ceramics

As a lead-free ceramic, lanthanum-modified barium titanate (BLT) has attracted significant attention among researchers in recent years due to its interesting ferroelectric and piezoelectric properties and insulating behavior, which can be improved by the doping effect. For that, (Ba 0.7 La 0.3 ) (Ti...

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Bibliographic Details
Published in:Journal of electronic materials 2021-12, Vol.50 (12), p.7198-7213
Main Authors: EL Ghandouri, A., Omari, L. H., Sayouri, S., Lamcharfi, T., El Akili, C., Elbasset, A.
Format: Article
Language:English
Subjects:
Barium titanates
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dielectric loss
Dielectric properties
Doping
Electronics and Microelectronics
Energy storage
Ferroelectricity
Fourier transforms
Infrared analysis
Instrumentation
Lanthanum
Lead free
Materials Science
Morphology
Multilayers
Nickel
Optical and Electronic Materials
Original Research Article
Permittivity
Piezoelectricity
Sol-gel processes
Solid State Physics
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Summary:As a lead-free ceramic, lanthanum-modified barium titanate (BLT) has attracted significant attention among researchers in recent years due to its interesting ferroelectric and piezoelectric properties and insulating behavior, which can be improved by the doping effect. For that, (Ba 0.7 La 0.3 ) (Ti 1− x Ni x )O 3 (where x  = 0%, 1%, 3%, 5%, 7% or 10%), denoted as BLTNx, were synthesized via the sol-gel process. The effect of the divalent ion Ni 2+ on the structural, microstructural and dielectric properties was investigated by x-ray diffraction (XRD) and Fourier transform infrared (FTIR), Raman, and impedance spectroscopy (IS). Surface morphology analysis is done by scanning electronic microscopy (SEM). Dielectric properties were determined in the ranges 28°C to 400°C and 1 kHz to 2 MHz. The results showed that a low doping amount of Ni ( x  
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-021-09261-4