Remote monitoring of thermal conductivity of a powder by a flash radiometry technique
- 15 August 1988
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 64 (4) , 2227-2229
- https://doi.org/10.1063/1.341690
Abstract
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.This publication has 7 references indexed in Scilit:
- Thermal conductivity of porous powder materialsPowder Metallurgy and Metal Ceramics, 1984
- Techniques of flash radiometryJournal of Applied Physics, 1984
- Heat Transport of Powder as the Subject of Cryogenic Insulation : 1st Report, Effective Thermal Conductivity at Atmospheric and Low PressuresBulletin of JSME, 1984
- Remote sensing applications of pulsed photothermal radiometryApplied Physics Letters, 1983
- Ultrasonic measurements in fine powders using a photoacoustic pulse-generation techniqueApplied Optics, 1983
- Thermal conductivity of magnesium-nickel hydride powder beds in a hydrogen atmosphereInternational Journal of Hydrogen Energy, 1982
- The thermal conductivity of powder beds. a model, some measurements on UO2 vibro-compacted microspheres, and their correlationJournal of Nuclear Materials, 1981