Title :
Effect of Reaction Temperature on Particle Size of Iron Oxide Nanoparticles via Heating of Platelet
-FeOOH in Tetraethylene Glycol
Author :
Latiff, Hawa ; Horiuchi, Akari ; Kishimoto, Mikio ; Yanagihara, Hideto ; Kita, Eiji
Author_Institution :
Inst. of Appl. Phys., Univ. of Tsukuba, Tsukuba, Japan
Abstract :
We investigated the effect of reaction temperature on particle size of spinel-structured ferromagnetic iron oxide particles obtained by heating the platelet α-FeOOH particles in tetraethylene glycol (TEG). This method is advantageous as it enables the omission of outer SiO2 shell layer and makes the surface modification easier. Oxide samples were reduced from α-FeOOH particles using TEG. The Fe3O4 particles were obtained through the formation of α-Fe2O3. The particles with single-phase Fe3O4 were obtained by heating above the temperature of 290 °C and confirmed by X-ray diffraction and Mössbauer spectroscopy. Among these single-phase Fe3O4 particles, a large proportion of relatively small-sized particles was obtained by increasing the reaction temperature to 310 °C. Fe3O4 particles sized 30-80 nm were finally obtained after heating at 310 °C for 60 min with the saturation magnetization of 83 Am2/kg and a coercive force of 13 kA/m.
Keywords :
Mossbauer effect; X-ray diffraction; coercive force; ferromagnetic materials; heat treatment; iron compounds; magnetic particles; nanomagnetics; nanoparticles; particle size; Fe3O4; Mossbauer spectroscopy; X-ray diffraction; coercive force; heating; iron oxide nanoparticles; particle size; platelet; reaction temperature effect; saturation magnetization; size 30 nm to 80 nm; spinel-structured ferromagnetic iron oxide particles; surface modification; temperature 290 degC; temperature 310 degC; tetraethylene glycol; time 60 min; Coercive force; Dispersion; Heating; Iron; Magnetic hysteresis; Nanoparticles; Saturation magnetization; Coercive force; coercive force; magnetic nanoparticles; polyhydric alcohol; spinel-structured iron oxides;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2438854