• MIL-88C (Fe) with varying aspect ratios as a precursor was synthesized by regulating oil bath conditions, followed by one-step thermal decomposition to obtain carbon-coated iron-based composites.

• High-efficiency microwave absorption properties were achieved with RL_min value of -67.4 dB (2.13 mm) and wide effective absorption bandwidth (EAB) of 5.52 GHz (1.90 mm) under the low filler loading.

• A symmetric gradient honeycomb structure was constructed utilizing the high-frequency structure simulator, achieving an EAB of 14.6 GHz and a RL_min of -59.0 dB.

中文翻译：

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采用碳涂层铁基复合材料设计对称梯度蜂窝结构以实现高效微波吸收

• 
  通过调节油浴条件合成了不同长径比的MIL-88C（Fe）作为前驱体，然后一步热分解得到碳包覆的铁基复合材料。

• 
  在低填料负载量下，实现了高效微波吸收性能，RL _min 值为-67.4 dB (2.13 mm)，有效吸收带宽 (EAB) 为 5.52 GHz (1.90 mm)。

• 
  利用高频结构模拟器构建了对称梯度蜂窝结构，获得了14.6 GHz的EAB和-59.0 dB的RL _min 。