The Co₂Y ferrite was prepared by sol–gel method, and its morphology, phase structure, magnetic, and electromagnetic parameters were investigated by related equipment. The results testified that the saturation magnetization which was measured by vibrating sample magnetometer (VSM) gradually decreases as the sintering temperature increases. The microwave absorbing peaks of Y-type ferrite moves to higher frequency with the rise of temperature. The minimum reflectivity value of the Y-type ferrite powder can achieve about −24.82 dB at 11.68 GHz with a thickness of 8.0 mm and the effective bandwidth (R < −10 dB) is 2.56 GHz. In addition, the microwave absorbing peaks of Nickel/Co₂Y ferrite mixture moves to a lower frequency with the addition of nickel power. The minimum reflection loss value of mixture that consist of 40% nickel and 60% Y ferrite was −33.75 dB at 4.88 GHz (in the C-band) with the thickness of only 2.5 mm. These indicate that the combination of alloy powder and ferrite can improve the reflection loss value of ferrite at low thickness.

用溶胶-凝胶法制备了Co ₂ Y铁氧体，并用相关设备研究了其形貌，相结构，磁和电磁参数。结果证明，通过振动样品磁力计（VSM）测量的饱和磁化强度随着烧结温度的升高而逐渐降低。随着温度的升高，Y型铁氧体的微波吸收峰移动到更高的频率。Y型铁氧体粉末的最小反射率值在11.68 GHz时可达到约-24.82 dB，厚度为8.0 mm，有效带宽（R  <-10 dB）为2.56 GHz。另外，镍/ Co ₂的微波吸收峰随着镍功率的增加，Y铁氧体混合物的频率降低。由40％的镍和60％的Y铁氧体组成的混合物的最小反射损耗值在4.88 GHz（在C波段）为-33.75 dB，厚度仅为2.5 mm。这些表明合金粉末和铁氧体的组合可以改善低厚度时铁氧体的反射损耗值。