Ultrafine NiFe2O4 powder fabricated from reverse microemulsion process

Abstract

NiFe 2 O 4 ultrafine powder with high crystallinity has been prepared through a reverse microemulsion route. The composition in starting solution was optimized, and the resulting NiFe 2 O 4 was formed at temperature of around 550-600°C, which is much lower than that observed from the solid-state reaction. Magnetic investigation indicates that samples are soft-magnetic materials with low coercivity and with the saturation magnetization close to the bulk value of Ni ferrite.

An attempt to produce NiFe2O4 powder from electrodeposited Fe–Ni alloy powders by subsequent recrystallization in air

“…It is shown that the air annealing of the as-deposited NiFe 2 O 4 thin films at 500°C for 5 h improves the crystallinity and morphology of the films. In the study of Fang et al [22], the NiFe 2 O 4 ultrafine powder with high crystallinity has been prepared through a reverse microemulsion route. After optimizing the composition in the starting solution, the resulting NiFe 2 O 4 was formed at temperature of around 550-600°C, which is much lower than that observed from the solid-state reaction.…”

Synthesis and study of magnetic properties of NiFe2O4 nanoparticles by PVA assisted auto-combustion method

“…Various methods have been established to prepare NiFe 2 O 4 nanoparticles, such as sol-gel method, reverse micelle, polymer assisted co-precipitation method, shock wave synthesis, combustion reaction, sonochemical process, hydrothermal methods, polymer-pyrolysis method, citrate precursor techniques and reverse micro emulsion process [7][8][9][10][11][12][13][14][15][16][17][18].…”

CTAB-assisted hydrothermal synthesis of NiFe2O4 and its magnetic characterization

“…Ferrites have been synthesized by various methods such as solid-state reaction, co-precipitation, high-temperature selfpropagating, microemulsion, solvothermal, mechanosynthesis, hydrothermal, sol-gel and combustion techniques [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The hydrothermal route is one of the most commonly used techniques owing to its economics and high degree of compositional control [24].…”