Standard Practice for Thermal Diffusivity by the Flash Method

Importancia y uso:

5.1 Thermal diffusivity is an important property, required for such purposes under transient heat flow conditions, such as design applications, determination of safe operating temperature, process control, and quality assurance.

5.2 The flash method is used to measure values of thermal diffusivity, α, of a wide range of solid materials. It is particularly advantageous because of simple specimen geometry, small specimen size requirements, rapidity of measurement and ease of handling.

5.3 Under certain strict conditions, specific heat capacity of a homogeneous isotropic opaque solid sample can be determined when the method is used in a quantitative fashion (see Test Method E1461, Appendix 1).

5.4 Thermal diffusivity results, together with related values of specific heat capacity (C_p) and density (ρ) values, can be used in many cases to derive thermal conductivity (λ), according to the relationship:

Subcomité:

E37.05

Referida por:

E3045-22, C1470-20, E1461-13R22

Volúmen:

14.01

Número ICS:

17.200.10 (Heat. Calorimetry)

Palabras clave:

flash method; infrared detectors; intrinsic thermocouples; specific heat capacity; thermal conductivity; thermal diffusivity; transient temperature measurements;