Influence of calcination temperatures on structure and magnetic properties of calcium ferrite nanoparticles synthesized via sol-gel method

Abstract

Calcium ferrite (CaFe2O4) nanoparticles using calcium nitrate and ferric nitrate as starting materials, and supplemented with citric acid as chelating agent was carried out. This mixture was synthesized through a sol-gel method and then calcined at 550 °C, 650 °C, and 750 °C. The effects of calcination temperatures on the crystalline structure, the surface morphology and the magnetic properties of CaFe2O4 NPs were observed. The orthorhombic structure of calcium ferrite NPS was analysed through an X-ray diffraction. The size of calcined samples at 550 °C, 650 °C, 750 °C were (13.59 nm), (18.9 nm), and (46.12 nm), respectively. Magnetic analysis was measured by using a vibrating sample magnetometer (VSM). The magnetic saturation (Ms) of samples calcined at 550 °C was found to possess the highest value of magnetic property; 80.33 emu/g.

Keywords

• Magnetic nanoparticles
• Ferrite
• Sol-gel method