Effect of surfactant addition on the magnetic properties of SrFe12O19 prepared by sol-gel auto-combustion method

In this research nano powders of Strontium hexaferrite were successfully synthesized by sol-gel auto-combustion route. The effects of calcination temperature and surfactant addition on the magnetic properties of hexaferrite have been studied. The powders have characterized by X-ray Diffraction (XRD), Vibration Sample Magnetometer (VSM) and Scanning Electron Microscope (SEM) methods. The results revealed that the addition of surfactant during the synthesis process of the sample calcined at 800°C, increased the coercivity from 4.9 kOe to 5.2 kOe and maximum magnetization (Mmax) from 48.41emu/g to 60.40 emu/g, respectively. The mechanism of the formation and variation in magnetic properties of the nano powders have been explained.

کلیدواژه ها:

Strontium hexaferrite ، sol-gel auto-combustion ، magnetic properties