氧化铝气凝胶的合成与性能

杨景锋, 王齐华, 王廷梅

Synthesis and Property of Alumina Aerogel

Jing-Feng YANG, Qi-Hua WANG, Ting-Mei WANG

表1 几种干燥方式的特点

Table 1 Characteristics of several drying methods

Drying method Characteristics Drying process Alumina aerogel Supercritical drying Short drying period, high synthesis cost Low density, high porosity and specific surface area, low volume shrinkage[34,35] Ambient pressure drying Long drying period, inexpensive synthesis cost, complicated drying process High volume shrinkage, large pore size, high density and low specific surface area [34,35,36,37] Freeze drying Long drying period, inexpensive synthesis cost High volume shrinkage, large pore size, high density and low specific surface area