NF EN ISO 22007-4
Plastics - Determination of thermal conductivity and thermal diffusivity - Part 4 : laser flash method
ISO 22007-4:2008 specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the laser flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face. The method can be used for homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, α, in the range 1 x 10-7 m2s-1 < α < 1 x 10-4 m2s-1. Measurements can be carried out in gaseous and vacuum environments over a temperature range from -100 °C to +400 °C. For inhomogeneous specimens, the measured values may be specimen thickness dependent.
ISO 22007-4:2008 specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the laser flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face.
The method can be used for homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, α, in the range 1 x 10-7 m2s-1 < α < 1 x 10-4 m2s-1. Measurements can be carried out in gaseous and vacuum environments over a temperature range from -100 °C to +400 °C.
For inhomogeneous specimens, the measured values may be specimen thickness dependent.
<p>ISO 22007-4:2017 specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the laser flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face.</p> <p>The method can be used for homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, <i>α</i>, in the range 1 × 10<sup>−7</sup> m<sup>2</sup>⋅s<sup>−1</sup> < <i>α</i> < 1 × 10<sup>−4</sup> m<sup>2</sup>⋅s<sup>−1</sup>. Measurements can be carried out in gaseous and vacuum environments over a temperature range from −100 °C to +400 °C.</p> <p>NOTE For inhomogeneous specimens, the measured values can be specimen thickness dependent.</p>
- Avant-proposiv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Principe2
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5 Appareillage2
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5.1 Généralités2
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5.2 Four ou enceinte climatique3
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5.3 Source flash4
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5.4 Détecteurs transitoires5
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5.5 Dispositif de mesure de l'épaisseur5
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6 Éprouvette5
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6.1 Forme et dimension de l'éprouvette5
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6.2 Préparation et conditionnement de l'éprouvette5
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6.3 Revêtement de l'éprouvette6
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7 Étalonnage et vérification6
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7.1 Étalonnage de l'appareillage6
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7.2 Vérification de l'appareilllage6
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8 Mode opératoire7
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9 Analyse des données8
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10 Incertitude9
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11 Rapport d'essai9
- Annexe A (informative) Correction relative à l'effet d'impulsion finie11
- Annexe B (informative) Autres méthodes de calcul de la diffusivité thermique12
- Bibliographie13
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