An Automated Thermal Conductivity Probe and Applications to Powders
A thermal conductivity probe has been developed for measurements of powders and porous media from ambient temperature to 1300 K in vacuum or in an inert gas atmosphere. Automated data acquisition and graphical analysis programs have been developed in FORTRAN for use with a laboratory minicomputer. Nonlinear data analysis techniques are available which can account for the probe response due to the effects of contact resistance and the thermal mass of the probe. Programs have also been developed with terminal BASIC for use with a small, portable desktop computer system. Examples of the use of the probe and data acquisition and analysis system are shown for measurement of the effective thermal conductivity of ceramic and metal powders.
KeywordsContact Resistance Effective Thermal Conductivity Sandia National Laboratory Probe Heater Radial Heat Flow
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