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Zhu, Tongguang; Sun, Yong; Wang, Yajing; Xing, Hongna; Zong, Yan; Ren, Zhaoyu; Yu, Haiping
Journal of materials science, 01/2021, Letnik: 56, Številka: 1Journal Article
The impedance matching is a very important part to influence materials' microwave absorption performance. However, a way to further discuss the impedance matching is still weak. We build a novel dielectric-magnetic impedance matching (DMIM) model to analyze the real part and imaginary part of materials' impedance matching. To verify the practicality of the DMIM model, using MIL-100(Fe) as precursor, a series of Fe.sub.xNi.sub.1-x@C are synthesized via one-step pyrolysis by controlling the samples' Fe-Ni ratio, changing their dielectric loss tangent and magnetic loss tangent and successfully regulating their impedance matching to optimize microwave absorption properties. In addition, the minimum reflection loss for MOF-derived Fe.sub.0.8Ni.sub.0.2@C can arrive at -71.3 dB at 10.3 GHz with a thickness of 3.1 mm, and the effective absorption bandwidth is 5.3 GHz. And combining with the RLGC equivalent circuit model to further indicate the Fe.sub.xNi.sub.1-x@C's energy loss mechanism. The method of using DMIM model and RLGC model to discuss materials' impedance matching and energy loss mechanism paves a new way to fabricate high-performance microwave materials with balanced electromagnetic distribution and further reveal the materials' microwave absorbing mechanism. Graphic abstract
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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