Hyperbranched polyborosilazanes derived SiBCN ceramic for high-temperature wave-transparent performance

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外文摘要：Polymer-derived ceramics(PDCs)is a promising way to prepare ceramic-based electromagnetic functional materials,which can conveniently modulate the composition and dielectric properties of the ceramics.In this paper,SiBCN ceramic matrix composites with excellent high-temperature wave-transparent perfor-mance were prepared through PDC method.Three hyperbranched polyborosilazanes(PBSZs)were pre-pared by adjusting the type of chlorosilane monomers containing different numbers of methyl groups.The carbon element of pyrolytic ceramics was tuned by adjusting the molecular structure of the precur-sor and the pyrolysis temperature.The lower the methyl number and pyrolysis temperature,the lower the dielectric constant of the polymer-derived SiBCN ceramics,which is favorable for electromagnetic wave(EMW)transmittance.The average EMW transmittance of SiBCN-C pyrolyzed from hyperbranched PBSZ using trichlorosilane at 1000 ℃ was 90.56％at room temperature.More excitingly,the excellent wave-transparent performance was also maintained in the temperature range of 100-800 ℃.At the test temperature of 800 ℃,SiBCN-C-1000 still had excellent wave-transparent performance with minimum and average EMW transmittance of 76.13％and 88.96％,respectively.This paper provided a new idea for the preparation of high-temperature wave-transparent SiBCN composite ceramics.

外文关键词：

Polymer-derived ceramicSiBCNLow carbon contentHigh temperature wave-transparent materials

作者：

Zhen Yu、Mingwei Ma、Ziyu Liu、Zhengyi Zhang、Chunjia Luo、Tiantian Zhang、Jie Kong

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作者单位：

MOE Key Laboratory of Materials Physics and Chemistry in Extraordinary Conditions,Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710072,China

School of Materials Science and Engineering Chang'an University,Xi'an 710064,China

基金：

National Science Fund for Distinguished Young ScholarsNational Key Research and Development Program of ChinaNational Natural science Foundation of ChinaPolymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars

项目编号：

520250342022YFB3807100/2022YFB380710122005039

出版年：

2024

DOI：

10.1016/j.jmst.2024.02.008

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.196(29)