Laser Flash Analysis (LFA)

Laser-Flash Analysis

Investigation of the thermal conductivity a, thermal conductivity λ and the spec. Heat capacity cp of solids

With the laser flash analysis, a vertical energy input takes place on the underside of a plane-parallel sample. The energy is brought in by a xenon flash lamp. An infrared detector is located above the sample, which measures the temperature rise on the top of the sample. The thermal diffusivity of the sample material is determined from the time lag between the energy input and output. Due to the strong temperature dependence of the conductivity, the investigation is carried out at operating points at constant temperature, so that the measurement is carried out isothermally.
By taking into account radiation losses and convection on the top of the sample, highly accurate and temperature-dependent results can be achieved with the laser flash method.

After the measurement, both the thermal conductivity and the spec. Heat capacity can be determined.

Our laser flash system conforms to the national and international standards ASTM E-1461, DIN 30905 and DIN EN 821.

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