Ternary mullite fibrous felt/opacifier/aerogel composites (MYTC) were prepared by impregnating the TiO₂ opacifier/Y₂SiO₅ aerogels into mullite felts. The effect of the TiO₂ opacifiers on the thermal insulation property of aerogel composite was investigated by adjusting the TiO₂ opacifier contents from 0 to 15 wt%. The as-prepared MYTC exhibited low density of 0.195 g/cm³ and low thermal conductivity of 0.042 W/m/K. The high-temperature resistance of MYTC was tested using a self-designed thermal insulation test system. It was found that the addition of Y₂SiO₅ aerogels and TiO₂ opacifiers significantly improved the thermal insulation performance of aerogel composites. The results demonstrated that MYTC showed more efficient heat insulation property as the back surface temperature of the MYTC was 157 °C lower than that of the mullite fiber felts as the front surface temperature of both was about 1200 °C. The as-prepared MYTC exhibited excellent high-temperature thermal insulation performance, making the materials potential application to high-temperature thermal insulation.

通过将TiO ₂遮光剂/ Y ₂ SiO ₅气凝胶浸渍到莫来石毡中来制备三元莫来石纤维毡/遮光剂/气凝胶复合材料（MYTC）。在TiO的效果_2个上气凝胶复合材料的热绝缘性遮光剂，通过调节在TiO研究₂为0〜15重量％的遮光剂的内容。所制备的MYTC表现出0.195g / cm ^3的低密度和0.042W / m / K的低热导率。使用自行设计的隔热测试系统对MYTC的高温电阻进行了测试。发现添加了Y ₂ SiO ₅气凝胶和TiO ₂遮光剂显着改善了气凝胶复合材料的隔热性能。结果表明，由于MYTC的后表面温度比莫来石纤维毡的底表面温度低约157℃，因为两者的前表面温度均为约1200℃，因此MYTC显示出更有效的隔热性能。所制备的MYTC具有优异的高温绝热性能，使该材料具有潜在的高温绝热应用前景。