多孔Al_2O_3负载纳米Fe颗粒复合材料的微观结构与磁性能  

Microstructure and Magnetic Properites of Nanocomposites with Iron Nanoparticles Supported by Porous Alumina

作　　者：刘守宪 史志成[2] 张子栋[2] 范润华[2] 

机构地区：[1]山东清华同方鲁颖电子有限公司,临沂276300 [2]山东大学材料液固结构演变与加工教育部重点实验室,济南250061

出　　处：《硅酸盐通报》2010年第6期1429-1432,1437,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(50772061);山东省科技攻关计划(2007GG10003007);山东省优秀中青年科学家科研奖励基金(2007BS04032);教育部新世纪优秀人才支持计划(NCET-10-0518)

摘　　要：采用浸渍-还原法制备多孔Al2O3负载纳米Fe颗粒复合材料。利用X射线衍射仪(XRD)、穆斯堡尔谱仪(M ssbauer)和振动样品磁强计(VSM)对样品的微观结构及磁性能进行了研究。发现铁元素以纳米级单质Fe颗粒和超顺磁态α-Fe2O3(<20 nm)的形式存在。通过穆谱知,氢气气氛600℃还原3h,59.9%铁元素转变为单质铁。浸渍-还原方法能在较低温度下成功制备不同组成、微观结构及磁性能的多孔磁性材料。Porous alumina supported iron composites were prepared through impregnation-reduction process.The phase identification and structural analysis of the samples were examined by X-ray diffraction technique,while the magnetic properties of the nanocomposites were investigated by vibrating sample magnetometer（VSM） and 57Fe Mssbauer spectrometry.It was found that iron elements exist in the form of iron nanoparticles and superparamagnetic α-Fe2O3（ 20 nm）.From the 57Fe Mssbauer spectra,we found that after calination under hydrogen atmosphere at 600 ℃ for 3 h,59.9% iron elements changed into iron.Porous magnetic composites with various compositons,microstructures and magnetic properties can be prepared through impregnation-reduction prodecure.

关 键 词：浸渍-还原法 多孔氧化铝 纳米复合材料 磁性能 

分 类 号：TB383[一般工业技术—材料科学与工程]