A high-temperature-resistant radiation-resistant heat insulation component and its preparation method
A radiation-resistant and high-temperature-resistant technology, applied in ceramic products, other household appliances, household appliances, etc., can solve the problems of not including a radiation-resistant layer, cannot withstand high temperature, and cannot be used, and achieves good radiation resistance. The effect of high temperature thermal insulation performance
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[0041] (1) Preparation of core layer:
[0042] A fiber-reinforced matrix formed of at least one fiber selected from the group consisting of quartz fibers, mullite fibers, and alumina fibers is selected. The density of the fiber reinforced matrix can be 0.1g / cm 3 to 0.14g / cm 3 . After preparing the Si-Al sol precursor, add a catalyst such as ammonia (the concentration can be 0.10% to 0.15% by mass, such as 0.12% by mass) and stir evenly, and use the RTM method to impregnate. After the impregnation is completed, after 24h to 48h After aging at room temperature, after 48h-72h of high-temperature aging, the mold was removed for solvent replacement twice, and then supercritical carbon dioxide drying was carried out for 96h. Finally, moisture-proof treatment is carried out in the atmosphere of hydrophobic agent, the treatment temperature is 100-150°C, and the treatment time is 24-48h. Then, the silicon dioxide airgel core layer material is obtained through machining and finishin...
Embodiment 1
[0051] Choose a density of 0.1g / cm 3 The mullite fiber-reinforced matrix is paved into the mold and clamped in place. After the Si-Al sol precursor with a concentration of 15% is prepared, it is mixed with 0.1mol / L NH 3 ·H 2 O Stir evenly according to the mass ratio of 100:3, use the RTM method for impregnation, after the impregnation is completed, after 48 hours of room temperature aging, and then after 48 hours of high temperature aging at 100 ° C, use ethanol for solvent replacement twice after demoulding, and then carry out Dry with supercritical carbon dioxide for 96 hours. Finally, moisture-proof treatment at 100° C. for 48 hours was carried out in an atmosphere of methyltrimethoxysilane. After finishing machining the inner and outer profiles, the airgel is evenly distributed with holes with a diameter of 1mm and a hole spacing of 30mm to obtain the airgel core layer material. After that, the graphite paper with a thickness of 0.2mm is laid flat and cut into a singl...
Embodiment 2
[0054] Choose a density of 0.1g / cm 3 The mullite fiber and quartz fiber are made into a uniform fiber-reinforced matrix in a ratio of 9:1. Lay it into the mold and close the mold in place. After preparing the Si-Al sol precursor with a concentration of 20%, mix it with 0.1mol / L NH 3 ·H 2 O was stirred evenly according to the mass ratio of 100:3, impregnated by the RTM method, aged at room temperature for 48 hours after impregnation, and then aged at 100°C for 48 hours at high temperature. Critical carbon dioxide drying for 96h. Finally, moisture-proof treatment at 150° C. for 24 hours was carried out in an atmosphere of methyltrimethoxysilane. After finishing machining the inner and outer profiles, the airgel is evenly distributed with holes with a diameter of 1mm and a hole spacing of 30mm to obtain the airgel core layer material. Afterwards, the graphite paper with a thickness of 0.5 mm is laid flat and cut into a single-sided size according to the inner and outer surfac...
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