PZT-NiCuZn复合材料的电磁特性

Electromagnetic Properties of PZT-NiCuZn Composite Materials

首先用溶胶-凝胶法制得Pb(Zr0.52Ti0.48)O3纳米(简称PZT)粉料,然后采用固相反应法制备PZT-NiCuZn铁氧体复合材料。研究了PZT含量对复合材料的显微结构、物相组成、致密化过程以及电磁性能的影响。结果显示,PZT组分与铁氧体之间没有任何反应,复合材料的主晶相为尖晶石相。随着PZT含量的增加,起始磁导率逐渐减小,品质因数增大,同时介电常数增大。该材料具有高的介电常数和良好的高频性能,有望用于抗电磁干扰滤波器。

Firstly, we prepared Pb（（Zr0.52Ti0.48）O3 （PZT） nanocrystalline by sol-gel method. Then PZT-NiCuZn composite ferrites were prepared by solid-state reaction method. We examined the effect of contents of PZT nanocrystalline on the microstructure evolution, phase composition, densification and electromagnetic properties of the composite materials. The results showed that no reaction occurs between the PZT and ferrite, and spinel ferrite is the main phase. As the amount of PZT increases, the initial permeability decreases gradually, and the quality factor and the permittivity increase markedly. Meanwhile the composites have relatively higher dielectric constant and good performance in high frequency range, which can he used in anti-EMI filters.