磁性核壳Fe_3O_4/Ag纳米复合粒子的制备及性能(英文)  

PREPARATION OF MAGNETIC CORE-SHELL Fe_3O_4/Ag NANOPARTICLES AND ITS PROPERTIES

作　　者：章桥新[1] 杨丽宁[2] 张佳明[2] 官建国[2] 王一龙[2] 

机构地区：[1]武汉理工大学机电工程学院 [2]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《硅酸盐学报》2007年第8期987-990,共4页Journal of The Chinese Ceramic Society

基　　金：国家"863"计划(2006AA03Z461);国防预研基金计划(51447020105QT6903)资助项目

摘　　要：以硅烷偶联剂巯基丙基三甲氧基硅烷作为添加剂,甲醛作为还原剂,在Ag[(NH3)2]+溶液中制备出具有核壳结构的Fe3O4/Ag纳米复合粒子。用X射线衍射、场发射扫描电镜、差热分析、振动样品磁强计和Hall效应测试系统对样品进行了表征。结果表明:Fe3O4/Ag核壳复合粒子粒径为40～60nm,Ag壳层厚度为10～15nm,体积电阻率为7.7573×10-4Ω.cm,饱和磁化强度为26.37A.m2/kg。Fe3O4/Ag core-shell nanoparticles were prepared by the reduction of Ag[（NH3）2]^＋ with formaldehyde as reductant, and mercapto-propyl-trimethoxy-silane as an additive. The nanocomposite particles were characterized by X-my diffraction, field-emissionscanning electron microscopy, differential thermal analysis, vibrating sample magnetometry and HL-5 hall effect testing. The results show that the size distributions of the core-shell Fe3O4/Ag nanocomposites averaged 40-60nm, with a thickness of 10-15 nm of Ag layer. The volume resistivity of the nanocomposites is 7.757 3 ×10^-4Ω·cm and the saturation magnetization is 26.37 A·m^2/kg.

关 键 词：磁性核壳 四氧化三铁/银 纳米复合粒子 电磁性能 

分 类 号：TQ171.71[化学工程—玻璃工业]