Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alumina aerogel composite material and preparation method thereof
The invention discloses an aluminum oxide aerogel composite material and a preparation method thereof, and the preparation method comprises the following steps: preparing a ceramic fiber prefabricated member by adopting high-temperature-resistant ceramic fiber as a raw material in a tiling and needling manner, and preparing aluminum oxide-silicon oxide sol by adopting an organic aluminum source precursor; the aluminum oxide aerogel composite material is prepared through the processes of sol dipping, gel pre-aging, supercritical drying, high-temperature and high-pressure aging, heat treatment and the like. By means of the preparation method, a large-size and large-thickness (20 mm or above) complex special-shaped component can be formed, the requirement of an aircraft for a wave-transparent heat insulation material in an extreme thermal environment is met, the product is shrunk within 2% after being treated for 2 h at the temperature of 1600 DEG C, and good heat insulation performance, wave-transparent performance and comprehensive mechanical performance are achieved.
本发明公开了一种氧化铝气凝胶复合材料及其制备方法，包括：采用耐高温陶瓷纤维为原料通过平铺、针刺方式制备陶瓷纤维预制件，采用有机铝源先驱体制备氧化铝‑氧化硅溶胶，通过溶胶浸渍、凝胶预老化、超临界干燥与高温高压老化、热处理等工艺制备氧化铝气凝胶复合材料。本发明的制备方法可以成型大尺寸、大厚度(20mm以上)的复杂异形构件，满足飞行器对极端热力环境下透波隔热材料的需求，产品在1600℃处理2h收缩在2％以内，并具备良好的隔热性能、透波性能和综合力学性能。
Alumina aerogel composite material and preparation method thereof
The invention discloses an aluminum oxide aerogel composite material and a preparation method thereof, and the preparation method comprises the following steps: preparing a ceramic fiber prefabricated member by adopting high-temperature-resistant ceramic fiber as a raw material in a tiling and needling manner, and preparing aluminum oxide-silicon oxide sol by adopting an organic aluminum source precursor; the aluminum oxide aerogel composite material is prepared through the processes of sol dipping, gel pre-aging, supercritical drying, high-temperature and high-pressure aging, heat treatment and the like. By means of the preparation method, a large-size and large-thickness (20 mm or above) complex special-shaped component can be formed, the requirement of an aircraft for a wave-transparent heat insulation material in an extreme thermal environment is met, the product is shrunk within 2% after being treated for 2 h at the temperature of 1600 DEG C, and good heat insulation performance, wave-transparent performance and comprehensive mechanical performance are achieved.
本发明公开了一种氧化铝气凝胶复合材料及其制备方法，包括：采用耐高温陶瓷纤维为原料通过平铺、针刺方式制备陶瓷纤维预制件，采用有机铝源先驱体制备氧化铝‑氧化硅溶胶，通过溶胶浸渍、凝胶预老化、超临界干燥与高温高压老化、热处理等工艺制备氧化铝气凝胶复合材料。本发明的制备方法可以成型大尺寸、大厚度(20mm以上)的复杂异形构件，满足飞行器对极端热力环境下透波隔热材料的需求，产品在1600℃处理2h收缩在2％以内，并具备良好的隔热性能、透波性能和综合力学性能。
Alumina aerogel composite material and preparation method thereof
一种氧化铝气凝胶复合材料及其制备方法
PENG FEI (Autor:in) / GAO QINGFU (Autor:in) / XIONG XI (Autor:in) / YANG BIN (Autor:in) / LI YONG (Autor:in)
09.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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