ISO 22007-7:2023 PDF

Plastics — Determination of thermal conductivity and thermal diffusivity — Part 7: Transient measurement of thermal effusivity using a plane heat source

Название (английский):

ISO 22007-7:2023

Plastics — Determination of thermal conductivity and thermal diffusivity — Part 7: Transient measurement of thermal effusivity using a plane heat source

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 18 апреля 2023 г.
Издание:: ISO IS 22007 edition 1 version 1
ICS:: 83.080.01

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Описание (английский):

This document specifies a method for the determination of the thermal effusivity. This document is applicable to materials with thermal effusivity in the approximate range 40 W⋅s1/2⋅m−2⋅K−1 bn W⋅s1/2⋅m‑2⋅K‑1, and temperatures in the range of 50 K T

Технические детали

Технический комитет: ISO/TC 61/SC 5 - Physical-chemical properties
SKU: ISO 22007-7:2023

Abstract

Overview

ISO 22007-7:2023 - "Plastics - Determination of thermal conductivity and thermal diffusivity - Part 7" - specifies a transient, plane-heat-source method for measuring thermal effusivity of plastics and polymer-based materials. The method uses a self-heated planar probe (combined heater and resistance thermometer) embedded in or between specimens and records the transient temperature response after a single-step heat pulse. The standard covers materials with thermal effusivity roughly from 40 to 40 000 W·s1/2·m−2·K−1 and temperatures from 50 K to 1000 K.

Key topics and technical requirements

Measurement principle: Single-step heat pulse with a planar probe acting as both heater and temperature sensor; analysis of temperature vs. time to derive the normal-direction thermal effusivity (b = sqrt(λ · ρ · cp)).
Two experimental configurations:
- Configuration A (rod-shaped specimens) - for higher-effusivity materials (≈ > 1 000 W·s1/2·m−2·K−1). Typical cross-section area ~7 mm² up to ~1 000 mm²; rod lengths ~3 mm to ~100 mm. Probe cross-section should match specimen cross-section.
- Configuration B (bulk specimens) - for lower-effusivity materials (≈

Overview

Key topics and technical requirements

Measurement principle: Single-step heat pulse with a planar probe acting as both heater and temperature sensor; analysis of temperature vs. time to derive the normal-direction thermal effusivity (b = sqrt(λ · ρ · cp)).
Two experimental configurations:
- Configuration A (rod-shaped specimens) - for higher-effusivity materials (≈ > 1 000 W·s1/2·m−2·K−1). Typical cross-section area ~7 mm² up to ~1 000 mm²; rod lengths ~3 mm to ~100 mm. Probe cross-section should match specimen cross-section.
- Configuration B (bulk specimens) - for lower-effusivity materials (≈

ISO 22007-7:2023 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

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