1.1 The three test methods provide the means to measure the thermal conductivity in the range 0.05 W/(m·K)-500 W/(m·K) and thermal diffusivity in the range 0.1 mm2/s-100 mm2/s of homogeneous isotropic and anisotropic solid materials with a uniaxial structure over the approximate temperature range 200 K-600 K.
1.1.1 Test Method A—Determination of the thermal conductivity and thermal diffusivity of isotropic solid bulk specimen.
1.1.2 Test Method B—Determination of the thermal conductivity and thermal diffusivity of anisotropic solid bulk specimen with a uniaxial structure.
1.1.3 Test Method C—Determination of the thermal conductivity and thermal diffusivity of isotropic thin solid slab specimen. This test method is particularly suited to study materials with thermal conductivity higher than 5 W/(m·K), and the thermal conductivity shall not be lower than 1 W/(m·K).
1.2 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices as well as determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
thermal conductivity; thermal diffusivity; transient plane source (TPS); double spiral (DS) probe; DS probe; anisotropic thermal properties
A significant increase in the development and application of new and improved materials for broad ranges of physical, chemical, biological, and medical applications has necessitated better performance data from methods of measurement of thermal-transport properties. The introduction of alternative methods that are relatively simple, fast, and of good precision would be of great benefit to the scientific and engineering communities. A number of measurement techniques described as transient methods have been developed and several have been commercialized. These are being widely used and are suitable for testing many types of material. In some cases, they can be used to measure several properties separately or simultaneously.
The title and scope are in draft form and are under development within this