Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Silicon nitride@carbon wave-absorbing foam, and preparation method and application thereof
The invention discloses a silicon nitride@carbon wave-absorbing foam, and a preparation method and an application thereof, and belongs to the field of composite material preparation. Silicon nitride nanoribbon aerogel with a three-dimensional network structure is used as a framework, an organic carbon source is used as a carbon precursor, the surface of the silicon nitride nanoribbon aerogel is uniformly coated with the organic carbon source through a simple hydrothermal method, and the silicon nitride@carbon wave-absorbing foam with the three-dimensional network structure is obtained throughpyrolysis and carbonization. A carbon material is compounded with silicon nitride nanoribbon aerogel with the three-dimensional network structure, and impedance matching between wave-absorbing foam and the environment is realized by utilizing a unique porous skeleton of the carbon material and a low dielectric constant of the silicon nitride aerogel; and a core-shell structure formed by the silicon nitride nanoribbons and a carbon coating layer and a continuous three-dimensional network mechanism in the wave-absorbing foam are utilized, multiple electromagnetic wave loss mechanisms such as interfacial polarization and multiple scattering are introduced, and the low-density wave-absorbing foam with excellent wave-absorbing performance is obtained.
本发明公开了一种氮化硅@碳吸波泡沫及其制备方法和应用，属于复合材料的制备领域，本发明以具有三维网络结构的氮化硅纳米带气凝胶为骨架，以有机碳源为碳前驱体，通过简单的水热法将有机碳源均匀地包覆于氮化硅纳米带气凝胶表面，并通过热解炭化得到三维网络结构的氮化硅@碳吸波泡沫。将碳材料与具有三维网络结构的氮化硅纳米带气凝胶进行复合，利用其独特的多孔骨架和氮化硅气凝胶本身的低介电常数，实现吸波泡沫与环境间的阻抗匹配；利用氮化硅纳米带和碳包覆层形成的核壳结构及吸波泡沫中的连续三维网络机构，引入了界面极化和多重散射等多中电磁波损耗机制，得到了具有优异吸波性能的低密度吸波泡沫。
Silicon nitride@carbon wave-absorbing foam, and preparation method and application thereof
The invention discloses a silicon nitride@carbon wave-absorbing foam, and a preparation method and an application thereof, and belongs to the field of composite material preparation. Silicon nitride nanoribbon aerogel with a three-dimensional network structure is used as a framework, an organic carbon source is used as a carbon precursor, the surface of the silicon nitride nanoribbon aerogel is uniformly coated with the organic carbon source through a simple hydrothermal method, and the silicon nitride@carbon wave-absorbing foam with the three-dimensional network structure is obtained throughpyrolysis and carbonization. A carbon material is compounded with silicon nitride nanoribbon aerogel with the three-dimensional network structure, and impedance matching between wave-absorbing foam and the environment is realized by utilizing a unique porous skeleton of the carbon material and a low dielectric constant of the silicon nitride aerogel; and a core-shell structure formed by the silicon nitride nanoribbons and a carbon coating layer and a continuous three-dimensional network mechanism in the wave-absorbing foam are utilized, multiple electromagnetic wave loss mechanisms such as interfacial polarization and multiple scattering are introduced, and the low-density wave-absorbing foam with excellent wave-absorbing performance is obtained.
本发明公开了一种氮化硅@碳吸波泡沫及其制备方法和应用，属于复合材料的制备领域，本发明以具有三维网络结构的氮化硅纳米带气凝胶为骨架，以有机碳源为碳前驱体，通过简单的水热法将有机碳源均匀地包覆于氮化硅纳米带气凝胶表面，并通过热解炭化得到三维网络结构的氮化硅@碳吸波泡沫。将碳材料与具有三维网络结构的氮化硅纳米带气凝胶进行复合，利用其独特的多孔骨架和氮化硅气凝胶本身的低介电常数，实现吸波泡沫与环境间的阻抗匹配；利用氮化硅纳米带和碳包覆层形成的核壳结构及吸波泡沫中的连续三维网络机构，引入了界面极化和多重散射等多中电磁波损耗机制，得到了具有优异吸波性能的低密度吸波泡沫。
Silicon nitride@carbon wave-absorbing foam, and preparation method and application thereof
一种氮化硅@碳吸波泡沫及其制备方法和应用
WANG HONGJIE (Autor:in) / WANG YUHUA (Autor:in) / LU DE (Autor:in) / YU ZHIMING (Autor:in) / CAI ZHIXIN (Autor:in)
29.05.2020
Patent
Elektronische Ressource
Chinesisch
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