Synthesis and characterizations of pure Ni and Ni-NiO composite ceramic annealed at varied temperatures

Nickel Oxide (NiO) has been synthesized by the solution combustion technique. Ni-NiO composite ceramic was prepared and annealed at 600° C and 1000° C for 2 hours. Structural, electrical, dielectric and magnetic properties were analysed which depend upon the synthesis method. Structural properties w...

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Bibliographic Details
Main Authors: Sharma, Khem Raj, Sharma, Hakikat, Negi, N. S.
Format: Conference Proceeding
Language:English
Subjects:
Annealing
Ceramics
Coercivity
Crystallites
Dielectric properties
Electrical resistivity
Magnetic properties
Nickel oxides
Synthesis
Temperature
X-ray diffraction
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Summary:Nickel Oxide (NiO) has been synthesized by the solution combustion technique. Ni-NiO composite ceramic was prepared and annealed at 600° C and 1000° C for 2 hours. Structural, electrical, dielectric and magnetic properties were analysed which depend upon the synthesis method. Structural properties were examined by X-Ray Diffractometer (XRD), which confirmed the purity and f.c.c. phase of Ni and Ni-NiO composite. XRD data reveals the decreases in crystallite size and increase in full width half maximum (FWHM) as the annealing temperature increases. Electrical conductivity is found to decrease from 10−2 to 10−6 (Ω−1cm−1) for Ni and Ni-NiOafter annealingtill 1000° C respectively. Dielectric constant for pure Ni is observed to be 3986 and decreased from 313.72 to 303.72 when the annealing temperature of Ni-NiO composite is increased from 600° to 1000°. High value of coercive field (54.31Oe) andremanent magnetization (1.18 emu/g) is found for Ni-NiO composite annealed at 1000° C. It is observed that better magnetic properties are achievedat higher annealing temperature for Ni-NiO composite ceramic.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5122347