methods

Laser Flash Technique (LFA)

based on, e.g., ASTM E1461, DIN EN 821-2, DIN 30905, ISO 22007-4, ISO 18755 

Principle of the LFA Method

The laser or light flash method is used for measurement of the Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity of a variety of different materials.

The front surface of a plane-parallel sample is heated by a light pulse and the resulting temperature rise at the sample’s rear face is recorded as a function of time. The higher the thermal diffusivity, the faster the temperature rise reaches the rear face.