Title :
Wide variety of ferrite fine particles synthesized from aqueous solution at room temperature
Author :
Nishimura, Kazuhiro ; Abe, Masanori ; Inoue, Mitsuteru
Author_Institution :
Dept. of Electr. & Electron. Eng., Toyohashi Univ. of Technol., Aichi, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
We developed a room-temperature synthetic method of preparing MxFe3-xO4 (M = Cu, Zn, Fe, Ni, Co, Mn, and Mg) or MxZn∼0.3Fe∼2.7-xO4 ultra fine particles from an aqueous solution, utilizing Fe2+→Fe3+ oxidation by air (oxygen). The synthesis was performed in open air and at near neutral conditions of pH=7-9. The particles were ∼10 nm in size and of spinel structure. All the particles had saturation magnetization that compared favorably with those of bulk samples. The solubility limit in x into the MxFe3-xO4 particles increased as the ratio Fe3+/Fe2+ in the reaction solution increased.
Keywords :
coercive force; ferrites; magnetic particles; magnetisation; materials preparation; oxidation; particle size; solubility; transition metal compounds; 10 nm; CoxFe3-xO4; CoxZn0.3Fe2.7-xO4; CuxFe3-xO4; CuxZn0.3Fe2.7-xO4; Fe3O4; Fe2+ to Fe3+ oxidation; Fe3+/Fe2+ ratio; MgxFe3-xO4; MgxZn0.3Fe2.7-xO4; MnxFe3-xO4; MnxZn0.3Fe2.7-xO4; NixFe3-xO4; NixZn0.3Fe2.7-xO4; Zn0.3Fe2.7O4; ZnxFe3-xO4; ZnxZn0.3Fe2.7-xO4; aqueous solution; ferrite fine particles; near neutral conditions; open air; oxygen; pH; reaction solution; room temperature synthetic method; saturation magnetization; solubility limit; spinel structure; Chemical analysis; Ferrites; Iron; Magnetic analysis; Magnetic flux; Magnetic separation; Oxidation; Plasma temperature; Saturation magnetization; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802502
