(La_(0.5)Na_(0.5))_xBa_(1-x)Fe_(12)O_(19)纳米铁氧体粉末的微波吸收特性  

Microwave Absorbing Properties of (La_(0.5)Na_(0.5))_xBa_(1-x)Fe_(12)O_(19)Nanosized Ferrite Powders

作　　者：刘学东[1] 卢佃清[1] 范喆[1] 徐超[2] 

机构地区：[1]淮海工学院数理科学系,江苏连云港222005 [2]内蒙古大学理工学院,内蒙古呼和浩特010021

出　　处：《磁性材料及器件》2007年第1期40-42,共3页Journal of Magnetic Materials and Devices

基　　金：淮海工学院自然科学课题资助项目(Z2004031)

摘　　要：利用柠檬酸溶胶-凝胶自蔓延燃烧法合成掺杂稀土元素镧的M型六角铁氧体(La0.5Na0.5)xBa1-xFe12O19(x=0.0,0.1,0.3,0.5)纳米粉末,铁氧体的晶型通过X射线衍射得到证实,研究了镧含量对铁氧体的复介电常数、复磁导率的影响。实验结果表明,添加适量的稀土镧能显著地改善铁氧体的吸波性能,掺杂量为x=0.3的样品微波性能最佳。（La0.5Na0.5）xBa1-xFe12O19 M-type hexagonal ferrite powder was synthesized by citric acid sol-gel .auto-combustion. The crystal of the ferrite was confirmed by XRD. The influence of doping amount on the complex dielectric constant and permeability of the ferrite was researched, The result indicates that microwave absorbtion properties of the ferrite can be improved evidently by doping proper amount of lanthanum. The sample （La0.5Na0.5）xBa1-xFe12O19 has good microwave absorbtion properties.

关 键 词：(La0.5Na0.5)xBa1-xFe12O19 溶胶-凝胶自蔓延燃烧法 稀土掺杂 微波吸收特性 

分 类 号：TM25[一般工业技术—材料科学与工程] TM277[电气工程—电工理论与新技术]