High-performance LaserFlash for measuring thermophysical properties

Description

Information about the thermophysical properties of materials and the optimization of heat flow in end products is becoming increasingly important in many industrial applications. In recent decades, the flash method has become the most commonly used technique for determining the thermal diffusivity and thermal conductivity of solids, powders and liquids.

The LINSEIS LFA L52 LaserFlash Analyzer is an effective method for measuring thermal conductivity, thermal diffusivity and specific heat with simultaneous measurement of up to three, six or 18 samples. Various furnaces allow measurement in a temperature range from -125°C to 2800°C. A turntable for a second furnace is available as an option.

The LaserFlash Analyzer uses a modulated laser beam that is focused on the bottom side of the sample to bring in a controlled amount of heat energy. The sample absorbs the laser puls and heat is transferred through the sample layer. At the top side of the sample there is a focus lense, an iris and a diode based IR-detector to monitor the amount of transferred heat and the transition time of the heat wave. By applying literature known models on the detector readout, the thermal diffusivity and thermal conductivity of the sample can be calculated depending on the sample temperature.