Feng, Yao ; Yang, Yujing ; Wen, Qingbo ; Riedel, Ralf ; Yu, Zhaoju (2020)
Dielectric Properties and Electromagnetic Wave Absorbing Performance of Single-Source-Precursor Synthesized Mo4.8Si3C0.6/SiC/Cfree Nanocomposites with an In Situ Formed Nowotny Phase.
In: ACS Applied Materials & Interfaces, 12 (14)
doi: 10.1021/acsami.0c01277
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
For the first time, dielectric properties and electromagnetic wave (EMW) absorbing performance of single-source-precursor derived Mo4.8Si3C0.6/SiC/C-free ceramic nanocomposites with a highly electrically conductive intermetallic Nowotny phase (NP, i.e., Mo4.8Si3C0.6) are reported. High-temperature phase evolution of the nanocomposites reveals that free carbon (C-free) plays a crucial role in the in situ formation of the NP, indicating that the microstructure of the nanocomposites can be tailored via molecular design of the single-source precursors. Compared with SiC/C-free and MoSi2/SiC/C-free nanocomposites obtained under the same conditions, the Mo4.8Si3C0.6/SiC/C-free nanocomposites exhibit significantly enhanced EMW absorbing performance. A minimum reflection loss (RL) of -59 dB was achieved at 8 GHz for the thickness of 2.46 mm, proving the superiority of the Mo4.8Si3C0.6/SiC/C-free nanocomposite as an outstanding EMW absorbing material. On the basis of our previous discovery that the Mo4.8Si3C0.6 embedded in a SiC-based matrix with high specific surface area exhibits excellent electrocatalytic properties suitable for the electrochemical hydrogen evolution reaction, the present results prove that Mo4.8Si3C0.6/SiC/C-free nanocomposites have to be considered as novel multifunctional materials with tailorable microstructure and excellent performance in two different fields including electrochemical water splitting and EMW absorption.
| Typ des Eintrags: | Artikel | ||||
|---|---|---|---|---|---|
| Erschienen: | 2020 | ||||
| Autor(en): | Feng, Yao ; Yang, Yujing ; Wen, Qingbo ; Riedel, Ralf ; Yu, Zhaoju | ||||
| Art des Eintrags: | Bibliographie | ||||
| Titel: | Dielectric Properties and Electromagnetic Wave Absorbing Performance of Single-Source-Precursor Synthesized Mo4.8Si3C0.6/SiC/Cfree Nanocomposites with an In Situ Formed Nowotny Phase | ||||
| Sprache: | Englisch | ||||
| Publikationsjahr: | 8 April 2020 | ||||
| Verlag: | American Chemical Society | ||||
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ACS Applied Materials & Interfaces | ||||
| Jahrgang/Volume einer Zeitschrift: | 12 | ||||
| (Heft-)Nummer: | 14 | ||||
| DOI: | 10.1021/acsami.0c01277 | ||||
| URL / URN: | https://pubs.acs.org/doi/10.1021/acsami.0c01277 | ||||
| Kurzbeschreibung (Abstract): | For the first time, dielectric properties and electromagnetic wave (EMW) absorbing performance of single-source-precursor derived Mo4.8Si3C0.6/SiC/C-free ceramic nanocomposites with a highly electrically conductive intermetallic Nowotny phase (NP, i.e., Mo4.8Si3C0.6) are reported. High-temperature phase evolution of the nanocomposites reveals that free carbon (C-free) plays a crucial role in the in situ formation of the NP, indicating that the microstructure of the nanocomposites can be tailored via molecular design of the single-source precursors. Compared with SiC/C-free and MoSi2/SiC/C-free nanocomposites obtained under the same conditions, the Mo4.8Si3C0.6/SiC/C-free nanocomposites exhibit significantly enhanced EMW absorbing performance. A minimum reflection loss (RL) of -59 dB was achieved at 8 GHz for the thickness of 2.46 mm, proving the superiority of the Mo4.8Si3C0.6/SiC/C-free nanocomposite as an outstanding EMW absorbing material. On the basis of our previous discovery that the Mo4.8Si3C0.6 embedded in a SiC-based matrix with high specific surface area exhibits excellent electrocatalytic properties suitable for the electrochemical hydrogen evolution reaction, the present results prove that Mo4.8Si3C0.6/SiC/C-free nanocomposites have to be considered as novel multifunctional materials with tailorable microstructure and excellent performance in two different fields including electrochemical water splitting and EMW absorption. |
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| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
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| Hinterlegungsdatum: | 11 Mai 2020 05:35 | ||||
| Letzte Änderung: | 11 Mai 2020 05:35 | ||||
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| Projekte: | China Scholarship Council, Grant Number 201606310021, Alexander von Humboldt Foundation, National Natural Science Foundation of China, Grant Number 51872246 | ||||
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