Wave absorbing performance of polymer-derived SiCN(Fe) ceramics

Wave absorbing performance of polymer-derived SiCN(Fe) ceramics
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聚合物基SiCN(Fe)陶瓷的吸波性能

DOI:
10.1016/j.ceramint.2017.08.106
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发表时间:
2017-12
影响因子:
5.2
通讯作者:
Gong Hongyu
Gong Hongyu
中科院分区:
材料科学1区
文献类型:
--
作者:
Wang Youzhi;Guo Xue;Feng Yurun;Lin Xiao;Gong Hongyu

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采用前驱体转化法成功合成了含铁聚合物衍生的SiCN陶瓷(PDCs-SiCN(Fe))。通过 XRD、SEM 和 TEM 研究了所得产物的物相组成和显微结构。结果表明,主要为非晶结构,间隙中有少量α-Fe和石墨相。研究了所制备陶瓷在 2 至 18 GHz 频段的电导率、电磁参数和吸波性能。添加 25 wt% 纳米 Fe2O3、厚度为 8 mm 的 PDCs-SiCN(Fe) 的反射率在 4–16 GHz 范围内约为 -10 dB(> 90% 吸收)。介电和磁损耗角正切最大值约为1.5,表明PDCs-SiCN(Fe)陶瓷具有良好的吸波性能。
Ferreous polymer-derived SiCN ceramics (PDCs-SiCN(Fe)) were successfully synthesized by precursor conversion method. The phase composition and microstructure of the obtained products were investigated by XRD, SEM and TEM. The result indicated a mainly amorphous structure with a few α-Fe,and graphite phases in the gaps. The conductivity, electromagnetic parameters and wave absorbing properties of the prepared ceramics were studied at the frequency band from 2 to 18 GHz. The reflectance of PDCs-SiCN(Fe) was about −10 dB (> 90% absorption) in the range of 4–16 GHz with 25 wt% nano-Fe2O3addition at the thickness 8 mm. The maximum value of dielectric and magnetic loss angle tangent was about 1.5, indicating PDCs-SiCN(Fe) ceramics possessed good absorption performance.
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