Synthesis and rheological characterization of nano‐magnetorheological fluid using inverse spinel ferrite (NiFe <sub>2</sub> O <sub>4</sub> )
Yagnasri Padma, Seetharamaiah Nuthalapati, Usha Sri Pantangi
Abstract
Abstract In recent years, the utilization of nanoparticles for nano‐magnetorheological fluid (NMRF) synthesis is gaining popularity in automotive applications. From this perspective, the nickel ferrite (NiFe 2 O 4 ) nanoparticles were prepared by gel burning method and characterized using the X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy‐energy dispersive X‐ray analysis (FESEM‐EDX), and vibration sample magnetometer (VSM). The XRD and FTIR results showed the phase formation and characteristic metal–oxygen M–O vibrations. The FESEM images showed quasi‐spherical crystallites with considerable agglomeration. The magnetic properties measured showed the ferromagnetic nature of NiFe 2 O 4 . The nanosized NiFe 2 O 4 was used for NMRF preparation and characterization.