期刊
CERAMICS INTERNATIONAL
卷 48, 期 14, 页码 20495-20505出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.04.012
关键词
PDCs-SiCN(Ni) fibers; EMW absorption properties; Electrospinning technology; Polymer-derived ceramics method; Nickel acetylacetonate
资金
- Natural Science Foundation of Shan-dong Province [ZR2019BEM013]
- Postdoctoral Science Foundation of China [2019M652441]
- Zibo Key Research and Development Project [2021SNPT0004]
SiCN(Ni) fibers with 1 wt % nickel content were synthesized using polymer-derived ceramics method and electrospinning technology. The addition of nickel promoted the formation of CNTs and Ni2Si, improving the impedance matching performance and electromagnetic wave absorption properties. The fabricated fibers showed low reflection loss and wide effective absorption bandwidth.
By utilizing polymer-derived ceramics (PDCs) method and electrospinning technology, SiCN(Ni) fibers with 1 wt % nickel content at different calcination temperatures (1000-1300 degrees C) were synthesized. The properties of PDCsSiCN(Ni) fibers were tested by XRD, SEM, TEM, Raman spectroscopy, XPS and vector network analyzer. The results showed that the addition of nickel acetylacetonate (NA) promoted the in-situ formation of CNTs and Ni2Si at high temperatures, which could adjust the impedance matching performance and improve the electromagnetic wave (EMW) absorption properties. The minimum reflection loss (RL) of SiCN(Ni) fibers was -47.55 dB (4.2 mm), and the effective absorption band (EAB, RL <= -10 dB) was 3.6 GHz (14.4-18 GHz) under the ultra-thin thickness of 1.24 mm.
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