Abstract
Nanocomposites with nickel ferrite nanoparticles uniformly dispersed in silica matrix were successfully synthesized using tetraethoxysilane as a precursor of silica and metallic nitrates as precursors of ferrite. The obtained (NiFe 2O 4) X SiO 2(1− X) (0.05⩽ X⩽0.55) samples were investigated by X-ray diffraction, differential scanning calorimetry, infrared spectroscopy, transmission electron microscopy and vibration sample magnetometer. The results show that for X⩽0.15 the materials have an amorphous character and for 0.15⩽ X⩽0.50 the crystalline sizes ranging from 2 to 25 nm increase with increasing concentration, while at higher concentrations, a decrease in the crystalline sizes is observed. The magnetic properties exhibit a strong dependence on the crystalline size, M s values increase with the crystalline size ranged from 3.7 to 11 emu/g and coercivity can get value as high as 313 Oe, which is more than four times higher than the coercivity of bulk nickel ferrite.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
