Preparation, Dielectric and Magnetic Properties of Barium-Ferrite-Containing Microcrystalline Glass Ceramic by Citrate Sol-Gel Process

摘要

Four kinds of barium-ferrite-containing microcrystalline glass ceramics, such as BaFe_(12)O_(19)/SiO_2, BaFe_(12)O_(19)/SiO_2-B_2O_3, BaFe_(12)O_(19)/SiO_2-B_2O_3-K_2O and BaFe_(12)O_(19)/SiO_2-Al_2O_3-K_2O were prepared by citrate sol-gel process, in which inceptive formation temperatures varied from 850°C to 1100°C. The complex dielectric constant and complex permeability of those glass ceramics were measured at 0.1-5.0GHz, and the frequency dependence of complex dielectric constant and permeability was studied. The microcrystalline glass ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).