Simple and cost-effective measurement of thermal conductivity

Description

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

The LINSEIS Light Flash LFA L51 series is ideal for determining/measuring the thermal diffusivity, thermal conductivity and specific heat of up to 18 samples in a temperature range from -100 °C to +1250 °C.

Measuring principle:

The sample to be measured is positioned horizontally on the sample carrier / sample changer in an IR or resistance-heated furnace. The furnace heats the sample to a fixed isothermal temperature. The lower side of the sample is then irradiated by a programmed energy pulse using a laser or xenon flashlamp.

This energy pulse leads to a homogeneous temperature rise on the top of the sample, which is measured against time using an infrared detector. The temperature and thermal conductivity can be calculated from this measurement data.