【作者】 胡平； 张深根； 王华； 潘德安； 田建军；

【Author】 HU Ping ZHANG Shen-gen WANG Hua PAN De-an TIAN Jian-jun (School of Materials Science and Engineering,Beijing University of Science and Technology, Beijing 100083,China)

【机构】 北京科技大学材料科学与工程学院；

【摘要】 采用硝酸盐-柠檬酸自蔓延燃烧法制备了软磁纳米Mn_0.9Zn_0.1Fe₂O₄铁氧体磁粉。用热分析（TG—DTA）对前驱干凝胶的燃烧过程进行了研究,X射线衍射（XRD）和透射电镜（TEM）分析表明,粉体为纳米级单相MnZn铁氧体,其晶粒大小约为25nm。振动样品磁强计（VSM）测得此Mn_0.9Zn_0.1Fe₂O₄铁氧体纳米粉体的饱和磁化强度M _s为66.07A·m²/kg,矫顽力H_c为6.68kA/m。由于纳米MnZn铁氧体磁粉具有很好的活性,可以用来制备高性能的软磁MnZn铁氧体材料。更多还原

【Abstract】 Soft magnetic Mn_0.9Zn_0.1Fe₂O₄ ferrite nanoparticles were prepared by the nitrate-citrate auto-combus- tion methods.Combustion behavior of precursor dried gel was investigated by the thermal analysis（TG-DTA）, X-ray diffraction（XRD）analysis and transmission electronic microscopy（TEM）.The results show that the nano- size powders are single phase and the corresponding grain size is about 25 nm.The saturation magnetization M_s and coercivity H_c of the Mn_0.9Zn_0.1Fe₂O₄ ferrites are 66.07 A·m²/kg and 6.68 kA/m.Moreover,the MnZn ferrite nanoparticles are highly active and can be used for fabricating high performance soft magnetic MnZn fer-rite material.更多还原