期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 263, 期 1, 页码 80-83出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0021-9797(03)00258-3
关键词
cobalt ferrite; coprecipitation; colloids; ferrous oxidation by nitrate; nanoparticles; magnetic characterization
Cobalt ferrite particles with diameters ranging from a few micrometer to about 15 run were synthesized using a modified oxidation process. The fine control of the particle size was achieved by introducing various concentrations of Fe3+ ions at the beginning of the reaction. Among the particle sizes obtained by using this method, particles with a grain size of about 36 nm showed a magnetization (M-S) of 64 emu/g and a maximum coercivity (H-C) of 2020 Oe at room temperature. The corresponding squareness ratio was found to be 0.53. (C) 2003 Elsevier Science (USA). All rights reserved.
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