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ASTM E3088-25

Standard Test Methods for Thermal Conductivity and Thermal Diffusivity Using a Double-Spiral Configuration of the Transient Plane Source Method
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ASTM E3088-25

Standard Test Methods for Thermal Conductivity and Thermal Diffusivity Using a Double-Spiral Configuration of the Transient Plane Source Method

PUBLISH DATE 2025
PAGES 12
ASTM E3088-25

1.1 The three test methods provide the means to measure the thermal conductivity in the range 0.05 W/(m·K) to 500 W/(m·K) and thermal diffusivity in the range 0.1 mm2/s to 100 mm2/s of homogeneous isotropic and anisotropic solid materials with a uniaxial structure over the approximate temperature range 200 K to 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 and 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.

5.1 Thermal transport properties are required for such purposes as design applications, estimation of operating temperature, process and quality control, or ranking products in relative order of their thermal transport properties.

5.2 The methods determine true bulk thermal properties of a wide range of materials over a broad temperature range from a single transient recording.

5.3 Thermal properties are determined as “at temperature” rather than “mean temperature” measurements, such that the results are not averaged over the large thermal gradient inherent in, for example, some steady-state techniques.

5.4 The methods and DS configuration of the transient plane source method are particularly advantageous because of ease of specimen preparation, flexible specimen size, rapidity of measurements, and ease of handling.

SDO ASTM: ASTM International
Document Number E3088
Publication Date Oct. 15, 2025
Language en - English
Page Count 12
Revision Level 25
Supercedes
Committee E37.05
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