采用新型的动态热机械性能分析仪,针对切割和打磨加工成小块的二氧化硅气凝胶试样,通过测定应力-应变曲线得到了弹性模量,还在低温(通过液氮冷却降温)、室温和高温等连续变化的温度范围内,通过测量其储能模量和损耗角正切值随温度变化的关系曲线,确定了力学性能与制备方法及温度之间的关系,并用实验证实了气凝胶低温吸附凝聚现象。 A new dynamic thermomechanical analyzer was developed for the cutting and grinding of small samples of airgel silica gel. The modulus of elasticity was obtained by measuring the stress-strain curve and was also measured at low temperature (cooled by liquid nitrogen cooling) , Room temperature and high temperature continuously changing temperature range, by measuring the relationship between storage modulus and loss tangent value with temperature, to determine the relationship between the mechanical properties and preparation methods and temperature, and experimentally confirmed the gas Gel cryogenic adsorption aggregation phenomenon.