سنتز پودر فريت نيكل با ابعاد نانومتر به روش - سل - ژل خوداحترامي

Synthesis of Nano-Size NiFe2O4 Ferrite Powders by Sol-Gel Auto-Combustion Method

In this work, A nitrate-citrate gel was prepared from iron nitrate, nickel nitrate and citric acid by sol-gel auto combustion method The thermal decomposition process was investigated by DTA/TG and XRD techniques. The results revealed that the nitrate-citrate gel exhibits self-propagating combustion behavior. After combustion, at 1000 °C for 1 hour the gel directly transformed into single-phase, nano-sized NiFe2O4 ferrite particles with cubic crystal structure. The average grain size was estimated by XRD and SEM and showed a crystal size under 100 nm.