CaO掺杂对NiCuZn系铁氧体性能的影响  

Effects of CaO doping on the properties of NiCuZn ferrites

作　　者：余捷[1] 周洪庆[1] 徐志明 赵建新[1] 沈伟[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]江苏华兴电子有限公司,江苏常州213234

出　　处：《电子元件与材料》2012年第12期35-38,共4页Electronic Components And Materials

基　　金：江苏省科技支撑项目资助(No.BE2009168)

摘　　要：采用传统陶瓷制备工艺制备了CaO掺杂的低温烧结(Ni0.2Cu0.2Zn0.6)1.02(Fe2O3)0.98(NiCuZn)系铁氧体材料,研究了CaO掺杂量对NiCuZn铁氧体电磁性能和微观结构的影响。结果表明:适量的CaO掺杂可以显著改善NiCuZn铁氧体的烧结性能和微观结构,进而影响其电磁性能。在CaO掺杂量为质量分数0.4%时,经885℃烧结3 h制得的NiCuZn铁氧体内部结构均匀致密并具有最佳的综合电磁性能,其起始磁导率、电阻率和功率损耗分别为354,5.6×1011.cm和214.5 kW/m3,另外,其与Ag电极的共烧匹配性良好。CaO doped （Ni0.2Cuo.2Zr10.6）1.02（Fe2O3）0.98 （NiCuZn） ferrites were prepared by low temperature sintering using the conventional ceramics preparation technique. The effects of CaO content on the microstructure and electromagnetic properties of the NiCuZn ferrites were investigated. The results show that doping suitable amount of CaO significantly improves the sintering performance, microstructure and hence the electromagnetic properties of the NiCuZn ferrites. The NiCuZn ferrite doped with 0.4% （mass fraction） CaO and prepared by sintering at 885 ℃ for 3 h shows a uniform dense microstructure and superior electromagnetic performance. Its initial permeability, resistivity and power loss are 354 , 5.6× 10^11 Ω· cm and 214.5 kW/m3, respectively. It also shows a good matching with Ag electrode during the co-fire process.

关 键 词：NICUZN铁氧体 掺杂 低温共烧 电磁特性 

分 类 号：TM277[一般工业技术—材料科学与工程]