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A platform for research: civil engineering, architecture and urbanism
Broadband high-temperature-resistant ceramic-based wave-absorbing material and preparation method thereof
The invention provides a broadband high-temperature-resistant ceramic-based wave-absorbing material and a preparation method thereof, and belongs to the technical field of wave-absorbing materials.The wave-absorbing material is prepared by the steps that silicon carbide powder with the particle size being 100-500 nm serves as a base material, silicon carbide, acetylene carbon black and a polycarbosilane solution are mixed and subjected to ball milling, ceramic slurry containing acetylene carbon black with different concentrations is obtained through configuration, and the ceramic slurry containing acetylene carbon black with different concentrations is prepared; and then pouring the ceramic slurry into a steel mold, placing the steel mold on a vibration table for vibration, then striking off the surface of a sample, placing the sample in a vacuum freeze dryer for drying, placing the dried blank sample in a vacuum environment for high-temperature cracking, and bonding to obtain the silicon carbide ceramic-based composite material. Impedance matching of the material can be effectively improved by utilizing a concentration gradient multilayer structure, and broadband high absorption of electromagnetic waves under a high-temperature condition can be realized by utilizing multiple reflection and scattering effects generated by electromagnetic waves between silicon carbide and acetylene carbon black and interface polarization loss of silicon carbide and carbon black.
本发明提供了一种宽频耐高温陶瓷基吸波材料及其制备方法，属于吸波材料技术领域，所述吸波材料以粒径为100～500nm的碳化硅粉末作为基体材料，将碳化硅与乙炔炭黑、聚碳硅烷溶液混合并球磨，配置得到分别含有不同浓度乙炔炭黑的陶瓷浆料，然后将陶瓷浆料倒入钢模中并置于振动台上振动，随后刮平试样表面，置于真空冷冻干燥机中干燥，将干燥后的坯体试样置于真空环境下高温裂解并粘接得到碳化硅陶瓷基复合材料。本发明利用浓度梯度多层结构可以有效提高材料的阻抗匹配，同时利用电磁波在碳化硅与乙炔炭黑之间产生多重反射和散射效应以及碳化硅与炭黑的界面极化损耗，可实现在高温条件下电磁波的宽频高吸收。
Broadband high-temperature-resistant ceramic-based wave-absorbing material and preparation method thereof
The invention provides a broadband high-temperature-resistant ceramic-based wave-absorbing material and a preparation method thereof, and belongs to the technical field of wave-absorbing materials.The wave-absorbing material is prepared by the steps that silicon carbide powder with the particle size being 100-500 nm serves as a base material, silicon carbide, acetylene carbon black and a polycarbosilane solution are mixed and subjected to ball milling, ceramic slurry containing acetylene carbon black with different concentrations is obtained through configuration, and the ceramic slurry containing acetylene carbon black with different concentrations is prepared; and then pouring the ceramic slurry into a steel mold, placing the steel mold on a vibration table for vibration, then striking off the surface of a sample, placing the sample in a vacuum freeze dryer for drying, placing the dried blank sample in a vacuum environment for high-temperature cracking, and bonding to obtain the silicon carbide ceramic-based composite material. Impedance matching of the material can be effectively improved by utilizing a concentration gradient multilayer structure, and broadband high absorption of electromagnetic waves under a high-temperature condition can be realized by utilizing multiple reflection and scattering effects generated by electromagnetic waves between silicon carbide and acetylene carbon black and interface polarization loss of silicon carbide and carbon black.
本发明提供了一种宽频耐高温陶瓷基吸波材料及其制备方法，属于吸波材料技术领域，所述吸波材料以粒径为100～500nm的碳化硅粉末作为基体材料，将碳化硅与乙炔炭黑、聚碳硅烷溶液混合并球磨，配置得到分别含有不同浓度乙炔炭黑的陶瓷浆料，然后将陶瓷浆料倒入钢模中并置于振动台上振动，随后刮平试样表面，置于真空冷冻干燥机中干燥，将干燥后的坯体试样置于真空环境下高温裂解并粘接得到碳化硅陶瓷基复合材料。本发明利用浓度梯度多层结构可以有效提高材料的阻抗匹配，同时利用电磁波在碳化硅与乙炔炭黑之间产生多重反射和散射效应以及碳化硅与炭黑的界面极化损耗，可实现在高温条件下电磁波的宽频高吸收。
Broadband high-temperature-resistant ceramic-based wave-absorbing material and preparation method thereof
一种宽频耐高温陶瓷基吸波材料及其制备方法
QIU LEI (author) / WEI WEI (author) / LONG CHANG (author) / LEI ZHIPENG (author) / HUANG CHENG (author) / WANG LI (author) / WU YAN (author)
2024-08-16
Patent
Electronic Resource
Chinese
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