Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention provides a short SiC (Silicon Carbide) fiber/SiO2 (Silicon Dioxide) aerogel heat-insulation composite material and a preparation method thereof. The composite material is characterized by being prepared from a SiC fiber and SiO2 collosol. The preparation method comprises the following steps; adding the SiC fiber to the SiO2 collosol, mixing uniformly, standing to form a gel, and aging to form alcogel; soaking the alcogel in absolute ethyl alcohol; modifying the surface of the alcogel by hexamethyldisiloxane or hexamethyl disiloxane; replacing a solvent in the alcogel with glycol and methanol respectively; and performing atmospheric pressure drying on a gel at different temperatures, thereby obtaining the short SiC fiber/SiO2 aerogel composite material. The composite material prepared by the method has the characteristics of large specific surface area, low heat conductivity factor, high-temperature resistance and the like, and the preparation method is simple and low in cost, and is suitable for industrial production.
The invention provides a short SiC (Silicon Carbide) fiber/SiO2 (Silicon Dioxide) aerogel heat-insulation composite material and a preparation method thereof. The composite material is characterized by being prepared from a SiC fiber and SiO2 collosol. The preparation method comprises the following steps; adding the SiC fiber to the SiO2 collosol, mixing uniformly, standing to form a gel, and aging to form alcogel; soaking the alcogel in absolute ethyl alcohol; modifying the surface of the alcogel by hexamethyldisiloxane or hexamethyl disiloxane; replacing a solvent in the alcogel with glycol and methanol respectively; and performing atmospheric pressure drying on a gel at different temperatures, thereby obtaining the short SiC fiber/SiO2 aerogel composite material. The composite material prepared by the method has the characteristics of large specific surface area, low heat conductivity factor, high-temperature resistance and the like, and the preparation method is simple and low in cost, and is suitable for industrial production.
| Europäisches Patentamt | 2023
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