Xf. Zhang et E. Barziv, A NOVEL-APPROACH TO DETERMINE THERMAL-CONDUCTIVITY OF MICRON-SIZED FUEL-PARTICLES, Combustion science and technology, 130(1-6), 1997, pp. 79-95
A novel approach to determine absolute values of thermal conductivity
of single micron-sized particles, has been developed. A particle was s
uspended in an electrodynamic chamber and was unevenly irradiated to i
mpose a temperature gradient within the particle, by a focused CO2 las
er beam. Consequently, a photophoretic force was generated from which
the particle thermal conductivity was determined. Maximum uncertainty
was estimated to be about 25%. Thermal conductivity of highly porous c
har particles was measured as a function temperature, in the range of
350-1150 K, showing increase of thermal conductivity with temperature.