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Whether you are an industrial company or a research lab, to understand the thermal behavior of the materials you use, you need reliable data to feed a model, or to verify the suitability of these materials for a specific application. LNE allows you to measure their thermal and radiative properties over a wide temperature range (-140 to 2000°C).
In sectors as critical as aerospace, defense, nuclear or transportation, you need reliable and accurate data on the thermal properties of your materials, in order to:
- provide parameters for numerical simulation tools, which are essential at the design stage,
- check their suitability for your specific applications,
- Scale and then safely operate the systems in which they are integrated.
To meet this need, LNE has developed a metrological platform dedicated to the characterization of the thermophysical properties of various types of materials (metals, ceramics, polymers, composites, etc.) over a wide temperature range (from -140 °C to 2000 °C) and benefits from a proven experience of the applications and constraints of these critical sectors.
Services offered
To characterize a material from a thermal point of view, LNE offers a wide range of services:
- Measurement of mass heat capacity (23°C to 2000°C)
- Measurement of the coefficient of thermal expansion (between -140°C and 2000°C)
- Measurement of thermal diffusivity (23°C to 2000°C)
- Determination of the thermal conductivity of conductive and medium-conductive materials (from 0.2 W.m-1. K-1) by indirect method (23°C to 2000°C)
- Measurement of induction time to oxidation
- DSC (Temperature and Enthalpy of Fusion) Differential Thermal Analysis
- Emissivity measurement
- Solar absorption factor measurement
- Measurement of the spectral reflectance factor
Determining the conductivity of a material
The thermal conductivity is equal to the product of three quantities:
Density x Mass Heat Capacity x Thermal Diffusivity
Our service therefore includes the measurements of these three quantities.
Means
Video of our ‘MATIS’ platform for characterising the thermal properties of materials
| Instrumentation | Measurements taken | Units |
|---|---|---|
| DSC Calorimeter | Mass heat capacity, transition enthalpy | Cp (J.kg-1.K-1) |
| Diffusivity meter | Diffusivité thermique | a (m2/s) |
| Dilatometer | Coefficient of thermal expansion | Alpha (K-1) |
| Dilatometer + DSC + Diffusivity Meter | Thermal conductivity | Lambda (W.m-1.K-1) |
| Visible spectrophotometer/FTIR | Emissivity and reflection factor | Unitless |
Test standards for the characterization of a material
- ASTM E228 : Standard Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
- ISO 11359-2: Plastics — Thermomechanical Analysis (TMA) — Part 2: Determination of the coefficient of linear thermal expansion and the glass transition temperature
- ISO 11357-3: Plastics — Differential calorimetric analysis (DSC) — Part 3: Determination of temperature and enthalpy of melting and crystallization
- ISO 11357-4: Plastics — Differential Calorimetric Analysis (DSC) — Part 4: Determination of Mass Heat Capacity
- ISO 22007-4: Plastics — Determination of thermal conductivity and thermal diffusivity — Part 4: Laser flash method
- NF EN 1159-2: Advanced technical ceramics - Composite ceramics - Thermophysical properties - Part 2: Determination of thermal diffusivity
Affected products
Metals, ceramics, polymers, bilayers, composites (isotropic or orthotropic) ...
Accreditations
The services are carried out under COFRAC* accreditation Calibration n° 2-56
New !
LNE has just extended its accreditation for diffusivity and thermal conductivity measurements up to 2000°C, for all types of materials (metals, ceramics, composites, etc.).
Why choose LNE
- Services provided under COFRAC* accreditation (accreditation no. 2-56) used for research purposes as well as for the realization of studies and measurements for industry
- Europe's most comprehensive metrological platform for measuring the thermophysical properties of materials
- Coordination of working groups on thermal properties within international metrological bodies (Euramet and BIPM)
- Participation in the development of national and international standards (ISO and CEN) in this field
- Experience in setting up scientific and industrial partnerships, as well as in the certification of reference materials
*List of sites and scopes available on www.cofrac.fr
LNE clients testify
Le LNE est le seul à avoir les compétences techniques et les équipements pour faire des essais complets de marquage CE des produits isolants thermiques industriels.
Jean-Philippe COIN
Responsable Qualité Sécurité Environnement - Ouest Isol
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