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通过熔炼及高温热处理的方法成功制备出Ce2(Fe0.7Co0.3)17合金,该合金不但保持了与Ce2Fe17同样的平面型磁晶各向异性类型,还具有高的饱和磁化强度(Ms=143.9 emu/g)和高于室温的居里温度(Tc=450 K).样品经高能球磨后得到的合金微粉与石蜡混合制成复合材料,通过矢量网络分析仪对其微波磁性进行表征.结果显示平面型Ce2(Fe0.7Co0.3)17材料的微波磁性突破了Snoek极限,并获得了大幅度提升.另外,对平面型Ce2(Fe0.7Co0.3)17复合材料的吸波性能进行了研究,其在1~10 GHz频段都能得到小于–10 dB的反射损耗,并且最强吸收峰在S波段内,峰值达到–35 dB,匹配厚度为4.7 mm.
Ce2 (Fe0.7Co0.3) 17 alloy was successfully prepared by melting and high temperature heat treatment. The alloy not only retains the same planar magneto-crystalline anisotropy type as Ce2Fe17, but also has high saturation magnetization (Ms = 143.9 emu / g) and higher than room temperature Curie temperature (Tc = 450 K) .The samples were high-energy ball mill obtained after the alloy powder and paraffin mixed into a composite material, characterized by a vector network analyzer microwave magnetic characterization results show The microwave magnetic properties of the planar Ce2 (Fe0.7Co0.3) 17 material break the Snoek limit and have been greatly improved.In addition, the microwave absorbing properties of the planar Ce2 (Fe0.7Co0.3) 17 composite have been studied Which can achieve a reflection loss of less than -10 dB in the 1 to 10 GHz band and has a peak absorption of -35 dB and a matching thickness of 4.7 mm in the S band.