Thermal and electrical conductivity of monolithic carbon aerogels

The thermal and electrical conductivity of monolithic carbon aerogels was investigated at room temperature. Results showed both the solid thermal conductivity and the electrical conductivity scale with the density in the range between 60 and 650 kg m−3. The scaling exponents for the two conductivities have identical values of 1.5. For a density of 82 kg m−3 a thermal conductivity of 0.029 W m−1 K−1 in air and 0.018 W m−1 K−1 after evacuation was found.

[1]  R. Pekala,et al.  Organic aerogels from the polycondensation of resorcinol with formaldehyde , 1989 .

[2]  D. W. Schaefer,et al.  Polymers, Fractals, and Ceramic Materials , 1989, Science.

[3]  T. Woignier,et al.  Elastic properties of silica aerogels , 1987 .

[4]  C. Cremers,et al.  Thermal conductivity 21 , 1990 .

[5]  J. Gross,et al.  Ultrasonic velocity measurements in silica, carbon and organic aerogels , 1992 .

[6]  R. Pekala,et al.  Thermal Conductivity of Monolithic Organic Aerogels , 1992, Science.

[7]  P. Scheuerpflug,et al.  Low-temperature thermal transport in silica aerogels , 1991 .

[8]  W. W. Tyler,et al.  THERMAL CONDUCTIVITY, ELECTRICAL RESISTIVITY AND THERMOELECTRIC POWER OF GRAPHITE , 1953 .

[9]  J. R. Thomas,et al.  Thermal Conductivity 20 , 1989 .

[10]  R. Pekala,et al.  Organic aerogels: microstructural dependence of mechanical properties in compression , 1990 .

[11]  X. Lu,et al.  Optimization of monolithic silica aerogel insulants , 1992 .

[12]  X. Lu,et al.  Thermal transport in opacified monolithic silica aerogels , 1991 .

[13]  J. Gross,et al.  Correlation between thermal conductivity and elasto-mechanical properties of compressed porous media , 1989 .

[14]  R. Pekala,et al.  Aerogels derived from multifunctional organic monomers , 1992 .

[15]  O. Johansen.  Thermal Conductivity of Soils , 1977 .

[16]  Gross,et al.  Elastic nonlinearity of aerogels. , 1992, Physical review. B, Condensed matter.

[17]  Doug Probert,et al.  Thermal conductivity 19: Edited by D. W. Yarbrough. Plenum Press, New York, USA, 1988. 565 pp. ISBN 0 306 42787 7. Price: US$138 , 1989 .

[18]  A. Nagashima,et al.  ABSOLUTE MEASUREMENT OF THE THERMAL CONDUCTIVITY OF ELECTRICALLY CONDUCTING LIQUIDS BY THE TRANSIENT HOT-WIRE METHOD (THERMAL CONDUCTIVITY OF AN AQUEOUS NaCl SOLUTION AT HIGH PRESSURE). , 1981 .

[19]  Feng,et al.  Transport properties of continuum systems near the percolation threshold. , 1987, Physical review. B, Condensed matter.