This document specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the light flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face.
The method is applicable to homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, α, in the range over a temperature range from −100 °C to +400 °C.
BS EN ISO 22007-4:2024 history
2024BS EN ISO 22007-4:2024 Plastics. Determination of thermal conductivity and thermal diffusivity - Light flash method
2017BS EN ISO 22007-4:2017 Plastics. Determination of thermal conductivity and thermal diffusivity. Laser flash method
2012BS EN ISO 22007-4:2012 Plastics. Determination of thermal conductivity and thermal diffusivity. Laser flash method