Thermal conductivity

The Linseis LFA 500 Light Flash offer a versatile tool to measure the Thermal Diffusivity, Thermal Conductivity and Specific Heat Values for up to 18 Samples at the same time. Information of the thermo physical properties of materials and heat transfer optimization of final products is becoming more and more vital for industrial applications. Over the past few decades, the flash method has developed into the most commonly used technique for the measurement of the thermal diffusivity and thermal conductivity of various kinds of solids, powders and liquids. The sample is either positioned on a sample robot, which is surrounded by a furnace (LFA 500-LT/500/1000) or within one out of five microheaters located on a moveable linear stage (LFA 500/1250). For the measurement, the furnace is held at a predetermined temperature and a programmable energy pulse irradiates the back side of the sample, resulting in a homogeneous temperature rise at the sample surface. The resulting temperature rise of the surface of the sample is measured by a very sensitive high speed IR detector. Both, thermal diffusivity and specific heat can be determined from the temperature vs. time data. If the density (r) is identified, the thermal conductivity can be calculated.