热解法制备氧化铁纳米晶及其表征  

Characterization of Ferric Oxide Nanocrystal Prepared by Thermal Decomposition

作　　者：李东平[1] 车成彬[1] 赵春山[1] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2003年第5期3-5,共3页Journal of Harbin University of Science and Technology

基　　金：哈尔滨青年基金会资助(2002AFQXJ026)

摘　　要：利用柠檬酸盐热解法制备了单相(纯态γ相)的Fe2O3纳米晶,平均晶粒度13.4nm,应用DTA,XRD,BET,SEM,磁滞回线及磁性分析等表征手段,研究了氧化铁晶体结构及相转变温度,n级粒子比表面积及粒子尺寸、表面状况、粉末的磁化强度、剩磁、矫顽力,发现了该超细粉表现出超顺磁效应和较强的自团聚现象,并对其可能的机理做了初步探讨.Super fine powder (SFP) of γ-Fe2O3 was prepared by thermal decompose ferric citrate. XRD showed the sample was γ-phase with average size 13.4nm. The formation temperature and crystal structure, specific surface and grain size of n-level grain, surface appearance and magnetization、remnaneuce、coercivity of the SFP were characterized by DTA, XRD, BET, SEM and magnetometric analysis methods respectively. The sample appeared self-aggregative and super paramagnetic properties.

关 键 词：热解法 氧化铁纳米晶 柠檬酸盐 超顺磁效应 自团聚现象 晶体结构 剩磁 矫顽力 相转变温度 

分 类 号：TB383[一般工业技术—材料科学与工程]