Sol–gel synthesis and physical properties of Ni–Cu based spinel ferrites nanoparticles

Sol–gel method has been used to synthesize copper substituted nickel ferrite Cu x Ni 1− x Fe 2 O 4 nanoparticles with different concentration of copper as x  = 0.0, 0.1, 0.2, 0.3, and 0.4. The crystallinity was confirmed through the powder X-ray diffraction method with single phase face-centred cubi...

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Bibliographic Details
Published in:Journal of materials research 2023-08, Vol.38 (15), p.3764-3775
Main Authors: Kalhoro, Kashif Ali, Khalid, Muhammad, Naz, Kiran, Akhtar, Muhammad Saeed, Nadeem, Muhammad, Somaily, H. H.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Chemistry and Materials Science
Copper
Crystallites
Dielectric properties
Fourier transforms
Functional groups
Impedance
Infrared analysis
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanoparticles
Nanotechnology
Nickel ferrites
Physical properties
Preferred orientation
Sol-gel processes
Substitutes
X ray powder diffraction
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Summary:Sol–gel method has been used to synthesize copper substituted nickel ferrite Cu x Ni 1− x Fe 2 O 4 nanoparticles with different concentration of copper as x  = 0.0, 0.1, 0.2, 0.3, and 0.4. The crystallinity was confirmed through the powder X-ray diffraction method with single phase face-centred cubic structure for all Cu x Ni 1− x Fe 2 O 4 samples having preferred orientation along (311) plane. The crystallite size was estimated through Scherrer’s formula and observed to be in the range from 21 to 38 nm. The microstructure of ferrite nanoparticles was characterized by the scanning electron microscopy. The existence of functional groups and copper substitution in Cu x Ni 1− x Fe 2 O 4 nanoparticles was investigated by Fourier transform infrared spectroscopy. Impedance analyser was employed to investigate the dielectric properties of copper substituted nickel ferrites. The high value of dielectric constant at low frequency and low impedance at high frequency would make these nanoparticles a potential candidate for microwave device applications. Graphical abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-023-01098-3