纳米α-Fe金属磁粉制备及其磁性能研究  

Study on Preparation of α-Fe Metallic Magnetic Nano powder and Its Magnetic Properties

作　　者：曾京辉[1] 郑化桂[1] 曾桓兴[1] 钱逸泰[2] 

机构地区：[1]中国科学技术大学化学系 [2]中国科学技术大学结构成分分析中心

出　　处：《中国科学技术大学学报》1999年第5期595-599,共5页JUSTC

摘　　要：探讨了一种新的纳米αＦｅ 金属磁粉制备方法．在乳化剂ＰＧ参与下，从铁盐溶液中沉淀析出ＦｅＣ２Ｏ４·２Ｈ２Ｏ作前驱体，经热分解、氢气还原和表面钝化处理，制备出轴比１～３（长短径比）、长径约５０ ｎｍ 的椭球或短棒状αＦｅ 金属磁粉．其主要磁性能，比饱和磁化强度σｓ 在１３７．３ Ａ·ｍ２·ｋｇ－１ ～１５７．５ Ａ·ｍ２·ｋｇ－１（ｅｍｕ·ｇ－１）之间，矫顽力Ｈｃ 在３１．８ ｋＡ·ｍ －１～４３．３ ｋＡ·ｍ －１（４００ Ｏｅ～５４４ Ｏｅ）之间．FeC 2O 4·2H 2O as precursor was precipitated from the solution of ferrous salts with emulsifier PG, and subsequently thermodecomposed to form α \%Fe 2O 3\%. After surface treated, α \%Fe 2O 3\% was reduced to α \%Fe\% powder by hydrogen. The product particles assume short stick or spheroidal shapes. The grain size is 50 nm, ratio of long and short diameter is 1～3. The chief magnetic properties of the synthesized powders are: the specific saturation magnetization σ s=137.3 A·m 2·kg -1 ～157.5 A·m 2·kg -1 , coercivity H c=31.8 kA·m -1 ～43.3 kA·m -1 .

关 键 词：纳米粒子 金属磁粉 磁记录特性 铁粉 α-Fe磁粉 

分 类 号：TQ586.1[化学工程—精细化工]