Abstract��CoFe2O4 nanoparticles were synthesized at 140-180 �� by hydro-thermal method and determined by X-ray diffractometer (XRD) and vibration sample magnetometer (VSM). The results showed that, along with the rise of synthesis temperature, the coercive force of nanoparticles increased at first and then decreased with peak appearing at 160 ��, but the grain size and saturation magnetization kept increasing all the time. Following magnetic separation of CoFe2O4 nanoparticles, it was found that the grain size and coercive force of the nanoparticles increased to certain extent, and the smaller the grain size of original sample became, the larger extent the grain size and coercive force increased. This indicated that, by means of magnetic separation, superparamagnetic particles could be removed, the grain size distribution could be reduced, and coercivity could be enhanced.
������������. CoFe2O4���������Ʊ������������̽��[J]. �й������ڿ���, 2015, 33(2): 13-15.
LIU Shu-long��YIN Jin-hua. Discussion on synthesis and coercive force of CoFe2O4 nanoparticles. Chinese Journal of Iron and Steel, 2015, 33(2): 13-15.
2015, Vol. 33 
