The SiC_w/SiC_f composites composed by SiC whiskers with core–shell structure and SiC fiber with alike-array structure were prepared without growth catalyst, hydrogen silicone oil (H-PSO) as raw material, carbon fiber as the matrix. SiC fibers act as supports for a nanomesh containing interconnected one-dimensional SiC whiskers. The results of studying the absorption properties of the Ku band show that the density of stacking faults decreases and the aspect ratio increases as the heat treatment temperature increases and they jointly affect the dielectric properties of the SiC_w/SiC_f composites. The minimum reflection loss of the SiC_w/SiC_f composites obtained at 1400 °C can reach − 29.75 dB when the absorber thickness is 3.0 mm, and the effective bandwidth is 2.25 GHz. The polarization relaxation and interfacial polarization in the unique structure improve the microwave absorption properties and broaden the absorption frequency.

在不使用生长催化剂，以氢硅油（H-PSO）为原料，以碳纤维为基质的情况下，制备了具有核壳结构的SiC晶须和具有相似阵列结构的SiC纤维组成的SiC _w / SiC _f复合材料。SiC纤维充当包含互连的一维SiC晶须的纳米网的载体。研究Ku带的吸收性能的结果表明，随着热处理温度的升高，堆垛层错的密度降低，长径比增加，并且共同影响SiC _w / SiC _f复合材料的介电性能。SiC _w / SiC _f的最小反射损耗当吸收器厚度为3.0 mm，有效带宽为2.25 GHz时，在1400°C下获得的复合材料可以达到− 29.75 dB。独特的结构中的极化弛豫和界面极化改善了微波吸收性能并拓宽了吸收频率。