THERMAL DIFFUSIVITY & THERMAL CONDUCTIVITY

Thermal diffusivity is a thermophysical property that defines the rate of transfer of heat of a material from the hot side to the cold side (conduction). As thermal diffusivity is temperature dependent, it is usually measured over the same range of temperatures the material will be required to operate. The thermal diffusivity is related to the thermal conductivity through specific heat capacity and density.

The most effective method used for measuring thermal diffusivity over a wide range of temperatures is the flash method. This transient technique is an absolute test, i.e. does not require calibration, features short measurement times, is completely non-destructive, and provides values with excellent accuracy and reproducibility.

The light flash technique provides information on a material’s ability to store and transfer heat through measurements of thermal diffusivity, thermal conductivity, and specific heat capacity. Thorough understanding of these properties is critical for any process or material which experiences a large or fast temperature gradient, or for which the tolerance against temperature change is exacting. Accurate values of these properties are essential for modeling and managing heat, whether the component of interest is called on to insulate, conduct, or simply withstand temperature changes. Information about these properties is routinely used in heat transfer models of all complexities. Heat transfer property measurements also reflect important information about material composition, purity and structure, as well as secondary performance characteristics such as tolerance to thermal shock.

Rotalab provides a full range of benchtop and floor-standing laser and Xenon light flash diffusivity analyzers for the precise and accurate measurement of heat transfer properties of a wide range of material types and temperatures.

  • LaserPIT

    ULVAC
    Thermal Diffusivity Measurement System
    Thermal Property Measurement System
  • FTC

    ULVAC
    Thermal Diffusivity Measurement System
    Thermal Property Measurement System
  • TD-1

    ULVAC
    Thermal Diffusivity Measurement System
    Thermal Property Measurement System
  • TC-1200RH

    ULVAC
    Thermal Constant Measurement System
    Thermal Property Measurement System
  • TC-9000

    ULVAC
    Thermal Constant Measurement System
    Thermal Property Measurement System
  • TC-UVH

    ULVAC
    Thermal Constant Measurement System
    Thermal Property Measurement System