Category: Transient Plane Source
Author(s): Bin Zhou, Guang Wu Liu, Qiu Jie Yu, Xing Yuan Ni
Keywords: density, Pore Size Distribution, SBET, SEM, Silica aerogels, specific surface area, Thermal Conductivity, thermal insulation, Transient Plane Heat Source Method
Abstract: Ultralow density silica aerogels were formulated by sol-gel process using tetramethyl orthosilicate as the precursor. A supercritical drying step was performed using acetonitrile solvent extraction. These aerogels were found to have a high specific surface area (~812m2/g) and they were found to be excellent thermal insulators with thermal conductivities ranging from 0.024 to 0.043 W/m K at temperatures up to 400oC.
Reference: Key Engineering Materials, 519 (2012) 83-86