Ni_(0.4)Co_(0.24)Zn_(0.36)La_xFe_(2-x)O_4铁氧体微波吸收特性的研究  

Study of Microwave Absorbing Properties of Ni_(0.4)Co_(0.24)Zn_(0.36)La_xFe_(2-x)O_4

作　　者：张磊[1] 丁铁柱[1] 尚涛[1] 王晓波[1] 闫祯[1] 李丽[1] 何杰[1] 

机构地区：[1]内蒙古大学物理科学与技术学院,内蒙古呼和浩特010021

出　　处：《稀土》2011年第4期35-39,共5页Chinese Rare Earths

基　　金：内蒙古教育厅高等学校自然科学重点项目(NJ09002)

摘　　要：采用溶胶-凝胶工艺制备了Ni_(0.4)Co_(0.24)Zn_(0.36)La_xFe_(2-x)O_4铁氧体,利用XRD和微波网络矢量分析仪对其相成分和吸收特性进行研究,实验发现:适量掺杂镧时能够增大吸收频带宽度,改善吸收性能;当x=0.07时,最大吸收可达38.55dB,几乎在整个频段内吸收量都大于15dB,这非常有利于作为高频吸波材料。通过对Ni_(0.4)Co_(0.24)Zn_(0.36)La_(0.07)Fe_(0.93)O_4铁氧体烧结温度的分析,发现在1000℃烧结,晶粒只有80nm左右,吸收性能最好。Ni0.4Co0.24Zn0.36LaxFe2-xO4 ferrite was prepared by solgel method. The crystal structure and microwave absorption properties were analyzed by XRD and microwave vector network analyzer. The results indicate that doping appropriate amount of rare earth lanthanum can increase absorbing band width and improve absorbing properties. When x is 0. 07, the highest absorption value reaches 38.55dB, and the absorption value reaches more than 15dB almost in all frequency hand which is beneficial to high frequency absorbing material. Through the analysis of sintering temperature for Ni0.4Co0.24Zn0.36LaxFe2-xO4 ferrite, it is found that when the sampleis sintered at 1000℃, the grain size is only about 80nm and the absorbing perforrnanee is best.

关 键 词：溶胶-凝胶 Ni0.4Co0.24Zn0.36LaxFe2-xO4 微波吸收性能 

分 类 号：TM277[一般工业技术—材料科学与工程]