Synthesis and magnetic properties of spinel NiFe2O4 nanoparticles by oxidation roasting technique
Jiaqi Wen, Jinpeng Yang, Chenghong Liu, Zhijun He, Lihua Gao
Abstract
An oxidization roasting technique has been reported to be an effective route to synthetize nickel ferrite (NiFe 2 O 4 ) with an inverse spinel crystal structure. In the present work, the interfacial reaction behavior and formation mechanism were clarified during the synthesis of nickel ferrite NiFe 2 O 4 . The nickel ferrite (NiFe 2 O 4 ) with a saturation magnetization (Ms) of 37.96 emu/g was successfully synthesized. The synthesized NiFe 2 O 4 particles had a pore volume of 0.001 cm 3 /g, a total pore volume of 0.004 cm 3 /g, a specific surface area (SSA) of 1.28 cm 2 /g nm, and an average pore size (SPA) of 1.28 nm. The nickel ferrite NiFe 2 O 4 was classified as having a reverse spinel crystal structure in which the mixed spinel nickel ferrites were transformed into an inverse spinel structure. Furthermore, the nickel ferrite (NiFe 2 O 4 ) could be successfully synthesized via oxidization roasting technique, which could be extended to fabricate other spinel ferrite particles of interest.