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High-temperature-resistant heat-insulating composite material with sandwich structure and preparation method thereof
The invention discloses a high-temperature-resistant heat-insulation composite material with a sandwich structure and a preparation method of the high-temperature-resistant heat-insulation composite material, and belongs to the technical field of heat-insulation materials. The preparation method comprises the steps of preparing composite boron nitride ceramic, preparing composite aerogel, preparing mixed sol and compounding; the preparation method comprises the following steps: compounding: overlapping and needling the composite boron nitride ceramic and the composite aerogel, then adding into a mold, adding the mold into a vacuum tank, vacuumizing, adding the mixed sol, ensuring that the composite boron nitride ceramic and the composite aerogel are completely soaked in the mixed sol, standing, transferring into a drying oven, carrying out heat treatment, then completely soaking in absolute ethyl alcohol, aging, transferring into a high-pressure reaction kettle, and cooling to room temperature. Carrying out supercritical drying by using carbon dioxide, transferring into a tubular furnace, and carrying out high-temperature treatment in a nitrogen atmosphere; the high-temperature-resistant heat-insulating composite material with the sandwich structure prepared by the invention has the advantages of high temperature resistance, hydrophobicity, good toughness, small heat conductivity coefficient, light weight, high strength, good thermal shock resistance and good permeability to microwave signals at high temperature.
本发明公开了一种具有三明治结构的耐高温隔热复合材料及其制备方法，属于隔热材料技术领域，所述制备方法为制备复合氮化硼陶瓷，制备复合气凝胶，制备混合溶胶，复合；所述复合，将复合氮化硼陶瓷与复合气凝胶叠合并针刺，然后加入模具中，将模具加入真空罐中，抽真空，加入混合溶胶，保证完全浸泡于混合溶胶中，进行静置，转入烘箱，进行热处理，然后完全浸泡于无水乙醇中，进行老化，转入高压反应釜中，使用二氧化碳进行超临界干燥，转入管式炉中，在氮气气氛中，进行高温处理；本发明制备的具有三明治结构的耐高温隔热复合材料的耐高温性、疏水性、韧性好，导热系数小，重量轻，强度高，抗热震性好，在高温下对微波信号的透过性能好。
High-temperature-resistant heat-insulating composite material with sandwich structure and preparation method thereof
The invention discloses a high-temperature-resistant heat-insulation composite material with a sandwich structure and a preparation method of the high-temperature-resistant heat-insulation composite material, and belongs to the technical field of heat-insulation materials. The preparation method comprises the steps of preparing composite boron nitride ceramic, preparing composite aerogel, preparing mixed sol and compounding; the preparation method comprises the following steps: compounding: overlapping and needling the composite boron nitride ceramic and the composite aerogel, then adding into a mold, adding the mold into a vacuum tank, vacuumizing, adding the mixed sol, ensuring that the composite boron nitride ceramic and the composite aerogel are completely soaked in the mixed sol, standing, transferring into a drying oven, carrying out heat treatment, then completely soaking in absolute ethyl alcohol, aging, transferring into a high-pressure reaction kettle, and cooling to room temperature. Carrying out supercritical drying by using carbon dioxide, transferring into a tubular furnace, and carrying out high-temperature treatment in a nitrogen atmosphere; the high-temperature-resistant heat-insulating composite material with the sandwich structure prepared by the invention has the advantages of high temperature resistance, hydrophobicity, good toughness, small heat conductivity coefficient, light weight, high strength, good thermal shock resistance and good permeability to microwave signals at high temperature.
本发明公开了一种具有三明治结构的耐高温隔热复合材料及其制备方法，属于隔热材料技术领域，所述制备方法为制备复合氮化硼陶瓷，制备复合气凝胶，制备混合溶胶，复合；所述复合，将复合氮化硼陶瓷与复合气凝胶叠合并针刺，然后加入模具中，将模具加入真空罐中，抽真空，加入混合溶胶，保证完全浸泡于混合溶胶中，进行静置，转入烘箱，进行热处理，然后完全浸泡于无水乙醇中，进行老化，转入高压反应釜中，使用二氧化碳进行超临界干燥，转入管式炉中，在氮气气氛中，进行高温处理；本发明制备的具有三明治结构的耐高温隔热复合材料的耐高温性、疏水性、韧性好，导热系数小，重量轻，强度高，抗热震性好，在高温下对微波信号的透过性能好。
High-temperature-resistant heat-insulating composite material with sandwich structure and preparation method thereof
一种具有三明治结构的耐高温隔热复合材料及其制备方法
LI ZHANFENG (author) / WANG MENGMENG (author) / LIU HONGHUA (author) / QI KAIYU (author) / SUN CHENGGONG (author) / LI HAN (author) / CUI TANGYIN (author) / WANG JIALIN (author) / WANG GUANGHUI (author) / YANG YANG (author)
2024-12-13
Patent
Electronic Resource
Chinese
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