GB/T 22588-2026Determination of thermal diffusivity or thermal conductivity by the flash method (English PDF)

GB/T 22588-2026 is the English-translated version of 闪光法测量热扩散系数或导热系数.

GB/T 22588-2026 is the Chinese standard "Determination of thermal diffusivity or thermal conductivity by the flash method". Its scope clause reads: This document describes a method for measuring thermal diffusivity or thermal conductivity using the flash method.

This document applies to measurements of uniformly heated surfaces with temperatures ranging from 75K to 2800K and thermal diffusivity ranging from 10^-^7 m²/s to 10^-³ m²/s.

Homogeneous isotropic solid materials. Specific heat capacity and thermal conductivity are determined according to Appendix A. This document applies to the testing of opaque materials with energy pulse spectra, and also to samples of materials that are fully or partially transparent after pretreatment.

Determination of thermal diffusivity (see Appendix B). This document, strictly speaking, applies only to fully dense (or low-porosity), homogeneous, and isotropic solid materials.

In some cases... This method is also applied to porous materials or materials with other properties. When analyzing data, note that porosity, pore shape, size, and distribution characteristics have an impact.

Thermal diffusion behavior of materials. This document also raises the following special considerations when determining the thermal conductivity of porous materials or other materials with different properties. matter. ---Testing composite materials.

When the material exhibits significant inhomogeneity and anisotropy, the measured data will have substantial errors. These data... While these statistics often lack absolute accuracy, they can still be used to compare the performance of composite materials with similar structures.

Note that composite materials can... It can have a non-axial heat transfer mode. ---Testing liquids and melts. This document can determine the thermal diffusivity of molten materials and requires a special container for use. ---Testing Multilayer Materials.

This document can be used to determine the properties of an unknown layer in a multilayer structural material. In some cases, it can also measure... The contact thermal resistance of the interface is obtained. Its clauses include terms and definitions.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.

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