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
发布时间：2021-09-03
点击次数：
影响因子：9.23
DOI码：10.1021/acsami.0c01277
发表刊物：ACS Applied Materials & Interfaces
摘要：For the first time, dielectric properties and electromagnetic wave (EMW) absorbing performance of single-source-precursor derived Mo4.8Si3C0.6/SiC/Cfree 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 (Cfree) 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/Cfree and MoSi2/SiC/Cfree nanocomposites obtained under the same conditions, the Mo4.8Si3C0.6/SiC/Cfree 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/Cfree 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/Cfree 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.
合写作者：Yujing Yang, Ralf Riedel
第一作者：Yao Feng
论文类型：期刊论文
通讯作者：Qingbo Wen, Zhaoju Yu
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：12
期号：14
页面范围：16912–16921
是否译文：否
发表时间：2020-03-17
收录刊物：SCI