W. Zapka, M. Levenson, et al.
Optics Letters
We study the dependence of the thermal conductivity of a carbon-loaded epoxy powder on its porosity using a noncontact flash radiometry technique. The thermal conductivity is found to be very small when the porosity of the sample is higher than a critical value. Below the critical porosity Pcrit, thermal conductivity increases linearly with packing density. This phenomenon can be explained by a two-phase model; the powder exhibits continuous thermal conduction paths only when the porosity is less than Pcrit.
W. Zapka, M. Levenson, et al.
Optics Letters
A.C. Tam, W. Zapka, et al.
Applied Optics
A.C. Tam, B. Sullivan
Applied Physics Letters
W. Zapka, Winfrid Ziemlich, et al.
Advanced Materials for Optics and Electronics