Recently, ferrite composite ceramics have received much attention for high-frequency device applications as the composite has both dielectric and magnetic properties, good chemical stability, and high electrical resistivity. M-type hexagonal ferrite BaFe₁₂O₁₉ (BaM) and cubic spinel ferrite CoFe₂O₄ (CoF) composites; (BaM)_1−x(CoF)_x (x = 0.0, 0.25, 0.50, 0.75, and 1.0) were successfully synthesized by co-precipitation method. X-ray diffraction (XRD) analysis confirmed the formation of pure-phase BaM ferrite at 800 °C and CoF ferrite at 600 °C, respectively. The XRD analysis of composite ferrite showed the presence of both BaM and CoF ferrite phases in the composite. The composites were sintered at 1100 °C/4 h. The composite with x = 0.25 composition showed the most compact microstructure structure and higher bulk density compared to other composites. The composite (with x = 0.25) also showed the highest permittivity (~ 15), permeability (~ 13), and antenna miniaturization factor (~ 14) at 500 MHz due to mainly better densification. The permeability of composite was almost stable up to about 500 MHz. The coercivity was lowest in the composite with x = 0.25 composition indicating a change of hard magnetic behavior of BaM ferrite into a soft magnetic character after composite formation, which may be due to the formation of enlarged grain of BaM in the composite.

近来，铁氧体复合陶瓷由于具有介电和磁性能，良好的化学稳定性和高电阻率，因此在高频器件应用中受到了广泛的关注。M型六角铁氧体BaFe ₁₂ O ₁₉（BaM）和立方尖晶石铁氧体CoFe ₂ O ₄（CoF）复合材料；（BaM）_{1− x}（CoF）_x（x 通过共沉淀法成功合成了0.0、0.25、0.50、0.75和1.0）。X射线衍射（XRD）分析证实分别在800°C和600°C形成纯相BaM铁氧体。复合铁氧体的XRD分析表明，复合物中同时存在BaM和CoF铁氧体相。将复合材料在1100℃/ 4h下烧结。 与其他复合材料相比，x = 0.25的复合材料显示出最紧凑的微观结构和更高的堆积密度。复合（与x = 0.25）在500 MHz时也表现出最高的介电常数（〜15），磁导率（〜13）和天线小型化因子（〜14），这主要是因为其致密性更好。复合材料的磁导率在大约500 MHz时几乎稳定。矫顽力在x  = 0.25的复合材料中最低，这表明复合材料形成后BaM铁氧体的硬磁性能转变为软磁特性，这可能是由于在复合材料中形成了BaM增大的晶粒。