Effect of Synthesis Temperature on Structural and Magnetic Properties in Hematite (-Fe2O3) Nanoparticles Produced by Co-Precipitation Method

Modification of nanometer size order in anode material of hematite nanoparticles is believed to be one of the keys to increasing the specific capacity of Li-ion batteries application. So that, the synthesis temperature dependence of nano-crystallite size properties in co-precipitated hematite nanoparticles is studied. Sample of Hematite nanoparticles is modified the physical properties by synthesis temperature i.e., 65C, 75C, 85C, 95C and then annealed of 700C for 4 hours. The x-ray diffractometer (XRD) results show that the crystallite size increase with the increase of the synthesis temperature i.e., 23.06 to 29.64 nm. It is indicated that the synthesis temperature affects crystallite formation. Furthermore, the magnetic properties by using vibrating sample magnetometer (VSM) show that the coercive field decrease from 869 to 211 Oe with the increase of the temperature synthesis. It is related to the change in the nano-size-order of the sample crystallite. Finally, the synthesis temperature of 65C should be considered as the suitable condition for obtained the small crystallite size of 23.06 nm with high coercive field of 869 Oe. © 2022 Trans Tech Publications Ltd, Switzerland.