An Overall Review of Low Temperature Co-fired NiCuZn Ferrites Prepared by the Ceramics Methods and the Sol-Gel Methods
The fine powders of Ni1-a-xZnxCuaFe2-δO4 (0.15≤a<0.25, 0.55≤x≤0.65) ferrites ware prepared by both ceramics method and the sol-gel method. Base on the same selected composition, the characteristics, includingμi, Q value,μQ product, tanδμ1, aμ, electronic resistivity p and the frequency spectra of/μi,μi, for the specimens sintered at 880+20℃ from both two kinds of powders, are illustrated and compared.The results demonstrate that the NiCuZn ferrite prepared by milling oxides processes has much higher properties than that by the sol-gel method, such as itsμQ product=12.3x104 with a factor of 2 times higher than the others and its resistivity of p>1012 Ωcm is in 3 orders higher than the others. The SEM photograph reveals that the porosity in the specimen by the sol-gel method is much higher than that by the ceramics method. Due to the material prepared by the sol-gel method has high cost and low/μQ product, the ratio of property to cost of the material by the ceramics method is much better than that by the sol-gel method with a factor of 20～16 times. It is also pointed out that the sol-gel method possesses some problems in serious environment pollution and non-convenient to manufactures.
NiCuZn ferrite low temperature co-firing permeability μQ product multylayer chipinductor ceramics method sol-gel method
Z.Q.Han Y.Liao T.Feng
Southwest Institute of Applied Magnetics,Mianyang 621000,Sichuan China, Southwest Institute of Applied Magnetics,Mianyang 621000,Sichuan China
国际会议
The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)
成都
英文
283-285
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）