Bi_2O_3掺杂和烧结温度对NiZn铁氧体截止频率的影响  

Effect of Bi_2O_3 Adding and Sintering Temperature on the Cut-off Frequency of NiZn Ferrites

作　　者：孔占兴[1,2] 梁迪飞[1,2] 谢建良[1,2] 邓龙江[1,2] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054 [2]电子科技大学电子隐身材料与技术教育部工程研究中心,四川成都610054

出　　处：《磁性材料及器件》2008年第6期61-64,共4页Journal of Magnetic Materials and Devices

摘　　要：以Ni0.25Co0.14Cu0.4Zn0.21Fe1.98O4为主配方,掺杂不同量的Bi2O3助熔剂,采用普通陶瓷工艺制备了NiZn铁氧体材料。分别采用X射线衍射(XRD)和扫描电镜(SEM)分析观察样品的相成分和微观形貌。用阻抗分析仪测试样品的磁谱,研究了Bi2O3助熔剂掺杂量和低温烧结对材料截止频率的影响。当起始磁导率为5.5时获得的截止频率为1GHz;材料中添加4wt%Bi2O3后,其烧结温度可以降低为850℃。Ni0.25Co0.14Cn0.4Zn0.21Fe1.98O4 ferrite was prepared using different amount of Bi2O3 as latent solvent by common ceramic process. X-ray diffraction （XRD） and scanning electron microscopy （SEM） were used to analysize the phase composition and observe the microstructure of samples, respectively. The permeability spectrum was measured by impedance analyzer to inspect the effect of Bi2O3 latent solvent and sintering temperature on the cut-off frequency of the samples. A cut-off frequency of 1GHz was achieved for initial permeability of 5.5. Sintering temperature can be decreased to 850℃ when adding 4wt% Bi2O3 latent solvent.

关 键 词：NIZN铁氧体 Bi2O3掺杂 截止频率 

分 类 号：TM277[一般工业技术—材料科学与工程]