Authors : B. I. Nandapure, A. I. Nandapure, Z. Parvin and S. B. Kondawar
Page Nos : 60-64
Description :
Abstract:
Nickel oxide nanoparticles were synthesized by a sol-gel process. The effect of various synthetic reaction and heat treatment conditions on the structure and magnetic properties of NiO nanoparticles was also studied. As-synthesized NiO nanoparticles have been characterized by X-ray diffraction, transmission electron microscopy, UV–VIS and FTIR spectroscopy. XRD revealed the NiO nanoparticles have single cubic phase structure with average particle size of 20 nm. NiO nanoparticles exhibited nanocrystalline grains with a randomly oriented morphology. The increase in the band gap can be related to the quantum confinement effects of the NiO nanoparticles. Electrical conductivity of synthesized NiO nanoparticles was found to be increased with the temperature. Magnetic behavior of the synthesized NiO nanoparticles was studied by using Vibration Sample Magnetometer (VSM). The squareness ratio (SQR) for the NiO nanoparticles was found to be 82.68 x 10-3 indicating that the NiO nanoparticles do not have the properties of a recording medium.
Keywords: Nickel oxide, nanoparticles, sol-gel, magnetic properties, squareness ratio
