Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material
The invention relates to a preparation method of a dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material, which comprises the following steps: introducing different contents of short carbon fibers into an alumina precursor dispersion liquid by adopting a stirring method, preparing different contents of carbon fiber/alumina nanowire clusters by adopting a hydrothermal method, and then carrying out compression molding to obtain the dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material. Carrying out solvent replacement on the formed block; and finally, carrying out supercritical drying and heat treatment in an inert atmosphere. According to the preparation method disclosed by the invention, the aluminum oxide nanowires with high length-diameter ratio are subjected to three-dimensional lap joint to construct an aluminum oxide nanowire network structure with uniformly distributed carbon fibers, and the density of the aerogel is controlled through compression molding, so that the preparation of the integrated aerogel with low cost, adjustable dielectric constant, light weight, efficient heat insulation and stealth is realized. According to the invention, uniformly distributed carbon fibers are introduced into the self-supporting nanowire skeleton to form a conductive network path, and the self-supporting nanowire has the characteristics of high temperature resistance, light weight, large-range adjustable dielectric constant, integration of heat insulation and stealth and the like.
本发明涉及一种介电可调耐高温隔热隐身一体化材料的制备方法，所述方法为：采用搅拌法在氧化铝前驱体分散液中引入不同含量的短切碳纤维，通过水热法制备不同含量碳纤维/氧化铝纳米线团簇，随后模压成型，并将成型后的块体进行溶剂置换；最后进行超临界干燥和惰性气氛下的热处理过程。本发明采用高长径比的氧化铝纳米线进行三维搭接，构建碳纤维均匀分布的氧化铝纳米线网络结构，并通过模压成型控制气凝胶密度，实现低成本、介电常数可调、轻质及高效隔热隐身一体化气凝胶的制备。本发明设计了在自支撑纳米线骨架中引入均匀分布的碳纤维，形成导电网络通路，具有耐高温、轻质、介电常数大范围可调、隔热隐身一体化等特点。
Preparation method of dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material
The invention relates to a preparation method of a dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material, which comprises the following steps: introducing different contents of short carbon fibers into an alumina precursor dispersion liquid by adopting a stirring method, preparing different contents of carbon fiber/alumina nanowire clusters by adopting a hydrothermal method, and then carrying out compression molding to obtain the dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material. Carrying out solvent replacement on the formed block; and finally, carrying out supercritical drying and heat treatment in an inert atmosphere. According to the preparation method disclosed by the invention, the aluminum oxide nanowires with high length-diameter ratio are subjected to three-dimensional lap joint to construct an aluminum oxide nanowire network structure with uniformly distributed carbon fibers, and the density of the aerogel is controlled through compression molding, so that the preparation of the integrated aerogel with low cost, adjustable dielectric constant, light weight, efficient heat insulation and stealth is realized. According to the invention, uniformly distributed carbon fibers are introduced into the self-supporting nanowire skeleton to form a conductive network path, and the self-supporting nanowire has the characteristics of high temperature resistance, light weight, large-range adjustable dielectric constant, integration of heat insulation and stealth and the like.
本发明涉及一种介电可调耐高温隔热隐身一体化材料的制备方法，所述方法为：采用搅拌法在氧化铝前驱体分散液中引入不同含量的短切碳纤维，通过水热法制备不同含量碳纤维/氧化铝纳米线团簇，随后模压成型，并将成型后的块体进行溶剂置换；最后进行超临界干燥和惰性气氛下的热处理过程。本发明采用高长径比的氧化铝纳米线进行三维搭接，构建碳纤维均匀分布的氧化铝纳米线网络结构，并通过模压成型控制气凝胶密度，实现低成本、介电常数可调、轻质及高效隔热隐身一体化气凝胶的制备。本发明设计了在自支撑纳米线骨架中引入均匀分布的碳纤维，形成导电网络通路，具有耐高温、轻质、介电常数大范围可调、隔热隐身一体化等特点。
Preparation method of dielectric-adjustable high-temperature-resistant thermal-insulation stealth integrated material
一种介电可调的耐高温隔热隐身一体化材料的制备方法
LI YIBIN (Autor:in) / ZHANG ENSHUANG (Autor:in) / KYOWAKA (Autor:in) / YUAN YE (Autor:in)
18.10.2024
Patent
Elektronische Ressource
Chinesisch
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