Abstract: BαZnZCo2-ZFe16O27/SiO2 microcrystalline glass ceramics with Z=0.0,0.5,0.8 and 1.1 were prepared at temperature 1200℃ for 5h by citrate sol-gel process. The complex dielectric constant and complex permeability of BaZnZCo2-ZFe16O27/SiO2-paraffin wax composites had been measured. Both the complex dielectric constant and dielectric loss exhibit almost no variation with frequency in 0.1-6.0GHz. The real part of permeability decreases with increasing frequency for all samples, and the imaginary part of permeability exhibits a clear resonance peak at 1.44GHz for Co2 W/SiO2,1.32GHz for Zn0.5Co1.5W/SiO2, 1.20GHz for Zn0.8Co1.2W/SiO2, and 1.08GHz for Zn1.1Co0.9 W/SiO2. It is also showed that the content of zinc has a close effect on the magnetic properties of BaZnZCo2-ZFe16 O27/SiO2 microcrystalline glass ceramics,the greater the zinc content, the higher the values of imaginary part of permeability and magnetic loss.

Key words: BaZnzCo2-zFe16O27/SiO2, microcrystalline glass ceramics, sol-gel,