Thermal Conductivity of Monolithic Organic Aerogels
- 21 February 1992
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 255 (5047) , 971-972
- https://doi.org/10.1126/science.255.5047.971
Abstract
The total thermal conductivity λ of resorcinol-formaldehyde aerogel monoliths has been measured as a function of density ρ in the range from ρ = 80 to 300 kilograms per cubic meter. A record-low conductivity value in air at 300 K of λ ≈ 0.012 watt per meter per kelvin was found for ρ ≈ 157 kilograms per cubic meter. Caloric measurements under variation of gas pressure as well as spectral infrared transmission measurements allowed the determination of solid conductivity, gaseous conductivity, and radiative conductivity as a function of density. The development of such low conductivity materials is of great interest with respect to the substitution of environmentally harmful insulating foams made from chlorofluorocarbons.Keywords
This publication has 4 references indexed in Scilit:
- Optimization of monolithic silica aerogel insulantsPublished by Elsevier ,2003
- Organic aerogels from the polycondensation of resorcinol with formaldehydeJournal of Materials Science, 1989
- ON THE FRACTAL STRUCTURE OF SILICA AEROGELSLe Journal de Physique Colloques, 1989
- AerogelsSpringer Proceedings in Physics, 1986