【摘要】 采用水热法制备了软磁材料MnFe2O4纳米晶,借助XRD、IR、SEM和VSM对产物进行了表征,着重研究了水热条件如温度和时间等对MnFe2O4纳米晶的形成及其结构和磁性能的影响。结果表明水热温度较低时的产物晶化度和纯度低,表现出较差的磁性能,温度为120℃的产物其饱和磁化强度为15.34emu/g,剩磁比为0.08,矫顽力为81Oe,而在200℃下水热产物饱和磁化强度为51.49emu/g,剩磁比达到0.14,矫顽力为121Oe。更多还原

【Abstract】 Mn ferrite nanocrystals were synthesized by hydrothermal process and characterized by XRD, IR,SEM and VSM. The influences of hydrothermal temperature and time on the formation of Mn ferrite nanocrystals, structures and magnetic properties were studied. The results show that the hydrothermal samples synthesized at low temperature exhibit low crystallinity and purity, and poor magnetic properties. At 120 ℃ , the samples exhibit the saturation magnetization of 15.34 emu/g, the remanence ratio of 0.08, and low coercivity of 81 Oe. When the hydrothermal temperature is fixed at 200 ℃ , the samples are pure cubic MnFe2O4 nanocrystals with saturation magnetization of 51.49 emu/g,remanence ratio of 0.14 and high coercivity of 121 Oe.更多还原