THERMAL-CONDUCTIVITY OF MONOLITHIC ORGANIC AEROGELS

被引：466

作者：

LU, X ^{[1
]}

ARDUINISCHUSTER, MC ^{[1
]}

KUHN, J ^{[1
]}

NILSSON, O ^{[1
]}

FRICKE, J ^{[1
]}

PEKALA, RW ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CHEM & MAT RES SCI,BERKELEY,CA 94720

来源：

SCIENCE | 1992年 / 255卷 / 5047期

关键词：

D O I：

10.1126/science.255.5047.971

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The total thermal conductivity lambda of resorcinol-formaldehyde aerogel monoliths has been measured as a function of density-rho in the range from rho = 80 to 300 kilograms per cubic meter. A record-low conductivity value in air at 300 K of lambda almost-equal-to 0.012 watt per meter per kelvin was found for rho almost-equal-to 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.

引用

页码：971 / 972

页数：2

共 12 条

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