摘要
本研究用一种在较高温度和较高压力下正硅酸乙酯的碱性溶液中老化湿硅凝胶的方法,得到的硅石气凝胶无裂纹,比表面积高达983 m2/g,孔体积为6.09 mL/g,孔隙率为91.8%,并与常规的老化方法作了比较。
A new method of silica aerogel aging under the condition of high temperature, high pressure and alkaline solution of ethyl orthosilicate is studied. The silica aerogel obtained by this method has low bulk density （0.18 g/cm^3） ,high specific surface area （983 m^2/g）, specific pore volume （6.09 mL/g） and porosity （91.8%）. The new method is prior to the major methods aged in pure ethanol at room temperature.
出处
《河南化工》
CAS
2008年第8期19-20,共2页
Henan Chemical Industry
基金
河南工业大学博士基金资助项目
关键词
硅石气凝胶
老化
超临界干燥
silica aerogel
aging
supercr/tical drying
