CoFe2O4纳米颗粒的溶液合成及磁性能.pdf

尚勋忠等:抗还原型PZT压电陶瓷的制备与性能· 715 ·第41卷第3期DOI:.0454– CoFe2O4纳米颗粒的溶液合成及磁性能彭韬1,齐建全2,岳振星1(1. 清华大学材料科学与工程系,新型陶瓷与精细工艺国家重点实验室,北京 100084;2. 东北大学秦皇岛分校材料科学与工程系,河北秦皇岛 066004) 摘要:以Co(NO)·6HO和Fe(NO)·9HO为原料,采用直接溶液合成法制备CoFeO纳米粉体。分析了纳米粉体的物相结构、微观形貌及合成机理,研究了热处理温度对粉体磁性能的影响。结果表明:所得CoFeO粉体为立方尖晶石铁氧体,颗粒细小、分散均匀,平均粒径约为5nm。500℃以下热处理的粉体表现出良好的超顺磁性;500℃以后,随热处理温度上升,颗粒尺寸变大,粉体的比饱和磁化强度M、比剩余磁化强度M和矫顽力H均增大。·m/kg。当热处理温度为900℃时,·m/kg,。关键词:铁酸钴;铁氧体;磁性能;直接溶液合成法中图分类号:TQ174 文献标志码:A 文章编号:0454–5648(2013)05–0715–05 网络出版时间:2013–04–23 10:25:15 网络出版地址:s/detail/ Synthesis of CoFe2O4 Nanoparticles via Solution Method and Their ic Properties PENG Tao1,QI Jianquan2,YUE Zhenxing1(1. Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing, Tsinghua University, Beijing 100084, China; 2. Department of Materials Sciences & Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao 066004, Hebei, China) Abstract: CoFe2O4 nanoparticles were prepared by a direct synthesis method from solution using Co(NO3)2·6H2O and Fe(NO3)3?9H2O as raw materials. The phase structure, micro-morphology and synthesis mechanism of the nanoparticles were analyzed. The effect of annealing temperature on the ic properties of the samples was investigated. The results show that the pr