尖晶石铁氧体吸波材料的复数磁导率

Complex Permeability in Absorption Materials of Spinel Ferrite

为了设计高效和宽频的微波吸波体,本文研究了吸波体对吸波材料的要求。研究结果表明:要想设计得到高质量的吸波体,要求材料的复数磁导率(包括其实部和虚部)具有适当高的数值。本文还研究了Ni铁氧体系列。首先研究了Co对Ni的替代对复数磁导率的影响,其次,研究了烧结温度对复数磁导率的影响,结果表明:选择适当的Co含量和烧结温度,可以得到较高的磁导率。

To seek high efficiency and wide frequency band of microwave absorber, the requirement of absorber on absorption materials is studied. It is shown that a larger value of permeability (include real and imaginery part) of absorption material should be gotten so as to design a high quality absorber.A series of Ni ferrites has been studied. First, the effect of Co addition on complex permeability is studied. Second, the effect of fabrication processes of materials on complex permeability is studied. The experiment results show that the larger complex permeability can be obtained by choosing the Co content and sinter temperature.