耐高温氧化铝气凝胶隔热复合材料研究进展

彭飞, 姜勇刚, 冯坚, 蔡华飞, 冯军宗, 李良军

Research Progress on Alumina Aerogel Composites for High-temperature Thermal Insulation

PENG Fei, JIANG Yonggang, FENG Jian, CAI Huafei, FENG Junzong, LI Liangjun

图13 引入氧化钛的莫来石纤维增强氧化铝气凝胶复合材料的高温热导率(a)[47], 不同氧化钛含量复合材料的高温热导率(b)[54], 含氧化钛的复合材料(厚度为20 mm)在丁烷火焰加热(1300 ℃, 15 min)下的冷面温度(c)[54], 复合材料的传热机制(λs、λg分别为固态、气态热导率)(d)[54]

Fig. 13 The mullite fiber felt reinforced alumina-silica aerogel composite doped with TiO2 (a) High-temperature thermal conductivity[47]; (b) High-temperature thermal conductivity of composites with different content of TiO2[54]; (c) Temperature (cold-face) of the composite (doped with 10wt% TiO2) fired by the flame of butane spray gun at 1300 ℃ for 15 min[54]; (d) Heat transfer mechanism of the composite (λs and λg refering to solid and gaseous thermal conductivity, respectively)[54]