Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature foamed ceramic composite structure wave-absorbing material and preparation method thereof
The invention discloses a high-temperature foamed ceramic composite structure wave-absorbing material which is prepared by taking porous SiC foam as a framework and loading a nano wave-absorbing agent on the porous SiC foam framework in a high-temperature sintering manner, wherein the aperture size of the porous SiC foam is 1-5 mm, and the resistivity is 10-1015 omega.m; the nano wave-absorbing agent is a TiC high-temperature-resistant dielectric material, and the microstructure of the nano wave-absorbing agent is a nanowire; the preparation method comprises the following steps: uniformly mixing TiC precursor powder with low-viscosity epoxy resin by adopting a high-speed shearing stirrer, and then dipping the porous SiC foam into the mixture; curing the soaked porous SiC foam according to a curing system of epoxy resin; and after curing, sintering in a tubular furnace under the protection of an argon atmosphere to obtain the TiC/SiC porous composite wave-absorbing material. Multiple reflection and scattering of electromagnetic waves in the porous structure and interface polarization loss of the SiC hole wall microstructure surface are fully utilized, and broadband efficient absorption of the electromagnetic waves is achieved.
本发明公开了一种高温泡沫陶瓷复合结构吸波材料，所述复合结构吸波材料以多孔SiC泡沫为骨架，纳米吸波剂以高温烧结的方式负载在多孔SiC泡沫骨架上而成；其中所述多孔SiC泡沫孔径尺寸为1‑5mm，电阻率为10‑1015Ω·m；所述纳米吸波剂为TiC耐高温介电材料，微观形貌为纳米线；制备方法包括采用高速剪切搅拌器将TiC前驱体粉末与低粘度环氧树脂均匀混合，随后将多孔SiC泡沫浸渍其中；浸料后的多孔SiC泡沫按环氧树脂的固化制度进行固化；固化后放入管式炉中在氩气气氛保护下进行烧结，得到TiC/SiC多孔复合吸波材料；本发明充分利用电磁波在多孔结构中的多重反射、散射以及SiC孔壁微结构表面的界面极化损耗，实现电磁波宽频高效吸收。
High-temperature foamed ceramic composite structure wave-absorbing material and preparation method thereof
The invention discloses a high-temperature foamed ceramic composite structure wave-absorbing material which is prepared by taking porous SiC foam as a framework and loading a nano wave-absorbing agent on the porous SiC foam framework in a high-temperature sintering manner, wherein the aperture size of the porous SiC foam is 1-5 mm, and the resistivity is 10-1015 omega.m; the nano wave-absorbing agent is a TiC high-temperature-resistant dielectric material, and the microstructure of the nano wave-absorbing agent is a nanowire; the preparation method comprises the following steps: uniformly mixing TiC precursor powder with low-viscosity epoxy resin by adopting a high-speed shearing stirrer, and then dipping the porous SiC foam into the mixture; curing the soaked porous SiC foam according to a curing system of epoxy resin; and after curing, sintering in a tubular furnace under the protection of an argon atmosphere to obtain the TiC/SiC porous composite wave-absorbing material. Multiple reflection and scattering of electromagnetic waves in the porous structure and interface polarization loss of the SiC hole wall microstructure surface are fully utilized, and broadband efficient absorption of the electromagnetic waves is achieved.
本发明公开了一种高温泡沫陶瓷复合结构吸波材料，所述复合结构吸波材料以多孔SiC泡沫为骨架，纳米吸波剂以高温烧结的方式负载在多孔SiC泡沫骨架上而成；其中所述多孔SiC泡沫孔径尺寸为1‑5mm，电阻率为10‑1015Ω·m；所述纳米吸波剂为TiC耐高温介电材料，微观形貌为纳米线；制备方法包括采用高速剪切搅拌器将TiC前驱体粉末与低粘度环氧树脂均匀混合，随后将多孔SiC泡沫浸渍其中；浸料后的多孔SiC泡沫按环氧树脂的固化制度进行固化；固化后放入管式炉中在氩气气氛保护下进行烧结，得到TiC/SiC多孔复合吸波材料；本发明充分利用电磁波在多孔结构中的多重反射、散射以及SiC孔壁微结构表面的界面极化损耗，实现电磁波宽频高效吸收。
High-temperature foamed ceramic composite structure wave-absorbing material and preparation method thereof
一种高温泡沫陶瓷复合结构吸波材料及其制备方法
LI YONGQING (Autor:in) / YAN LIULIU (Autor:in) / WANG XUAN (Autor:in) / XU MENGQIU (Autor:in) / HUANG WEI (Autor:in)
01.09.2023
Patent
Elektronische Ressource
Chinesisch
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