钐掺杂镍铁氧体纳米粉体的制备和结构分析  

Preparation and Structure Analysis of Nano-Sized Ni-Ferrite Powder Doped with Sm^(3+)

作　　者：李良超[1] 周享春[2] 郝仕油[1] 吕天喜[1] 

机构地区：[1]浙江师范大学化学系 [2]长江大学化学与环境工程学院,湖北荆州434020

出　　处：《武汉大学学报（理学版）》2005年第4期411-415,共5页Journal of Wuhan University:Natural Science Edition

基　　金：湖北省自然科学基金(2004ABA104);浙江省"重中之重"学科基金;浙江师范大学重点扶持学科基金(ZC319003230)资助项目

摘　　要：用流变相-前驱物热分解反应法制备了钐掺杂镍铁氧体纳米粉体SmxNiFe2-xO4(x=0,0.33,0.67).用TG(热重)、XRD(粉末X-射线衍射)和LPSA(激光粒度仪)对粉末样品的组成、结构、粒度分布和粒子的团聚进行了表征.结果表明SmxNiFe2-xO4的晶胞结构可用(Ni0.37Fe0.63)[Ni0.63SmxFe1.37-x]O4表示,属于立方晶系的球形粒子,平均粒径分别约为12.5,20.1,27.6nm,在水溶剂中团聚体的平均粒径分别约为153.7,257.9,348.4nm.另外,研究了钐取代铁对镍铁氧体的密度、晶胞参数和电阻率的影响,并从结构的角度进行了解释.Nano-sized Ni ferrite and Sm^3＋ doped Ni ferrite powder SmxNiFe2-xO4（x=0, 0.33, 0.67） were prepared hy method of the rheological phase thermal decomposition of precursors. The composition, structure, size distrihution and particle polymer of the power samples were characterized by the means of TG （Thermogravimetry）, XRD（X-ray diffractometer） and LPSA （laser particles size analyzer）. The results indicate that Sm, NiFe2-xO4 are spherical particles belong to cubic system. Its cell structure are represented hy （Ni0.37Fe0.63）[Ni0.63SmxFe4.37-x]O4, and the average diameter of the particles are 12. 5, 20. 1, 27,6 nm, respectively. The average diameter of the particles are 153.7, 257.9 nm and 348.4 nm, respectively, The effects of Fe substitution by Sm on the density, lattice parameter and electrical resistivity of Ni-ferrite were investigated and explained from point of view their structure.

关 键 词：钐 掺杂 纳米粉体 镍铁氧体 

分 类 号：O614.33[理学—无机化学]