The impact of reaction temperature on the synthesis of 〖Mn〗_(0.5) 〖Zn〗_(0.5) 〖Fe〗_2 O_4 ferrite nanoparticles by sol-gel auto-combustion and co-precipitation methods and investigation of magnetic attributes

This study explores the synthesis of manganese-zinc ferrite nanoparticle powder (Mn0.5Zn0.5Fe2O4) using co-precipitation and sol-gel autoignition methods. The research focuses on the effects of calcination temperature and surfactant type on the magnetic properties and microstructure of the ferrites. Calcination temperatures ranging from 500°C to 1200°C were investigated in the sol-gel self-combustion method, with particular attention to 800°C based on preliminary findings. Subsequently, two surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), were examined using the co-precipitation method. The microstructure and phase composition of the samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), while magnetic properties were evaluated using a vibrating sample magnetometer (VSM). XRD analysis indicated that at 800°C in an oxidizing atmosphere, MnO2 and Fe2O3 were the dominant phases, with minimal ferrite phase formation. However, the use of an argon atmosphere facilitated ferrite formation at lower temperatures (800°C). Saturation magnetization (Ms) values showed that samples calcined at 1200°C exhibited a magnetization of nearly 27 emu/g, whereas those processed at 800°C in air displayed roughly 1 emu/g. Notably, samples calcined at 800°C under argon exhibited a significant increase in magnetization to approximately 75 emu/g, highlighting the critical role of furnace atmosphere in determining magnetic properties. Further investigation revealed that samples synthesized with SDS achieved an Ms value about 47 emu/g, significantly lower than those prepared with CTAB (about 71 emu/g).

The impact of reaction temperature on the synthesis of 〖Mn〗_(0.5) 〖Zn〗_(0.5) 〖Fe〗_2 O_4 ferrite nanoparticles by sol-gel auto-combustion and co-precipitation methods and investigation of magnetic attributes Keywords:

Sol-gel auto-combustion , Co-precipitation , Manganese-zinc ferrite.