IEC TS 62607-2-6-2024 PDF

Full title and description

IEC TS 62607-2-6:2024 — Nanomanufacturing — Key control characteristics — Part 2-6: Carbon nanotube-related products — Thermal diffusivity of vertically-aligned carbon nanotubes: flash method. This Technical Specification defines a standardized flash-lamp or laser pulse method and the associated measurement and analysis procedure to determine the thermal diffusivity of vertically-aligned carbon nanotube (VACNT) films grown on solid substrates; it is intended for use in characterization and quality control of VACNT films used as thermal interface or heat-spreading materials.

Abstract

This document specifies a protocol for measuring the thermal diffusivity of VACNT films on solid substrates using a front-side flash (light pulse) and rear-surface transient temperature monitoring. It covers sample preparation notes, thickness and mass-density considerations, instrumentation (flash/laser pulse and rear-surface temperature sensors), a bilayer analytical model for data analysis, reporting requirements and informative annexes with case studies and guidance for estimating thermal conductivity from measured diffusivity.

General information

• Status: Published — Technical Specification (current publication).
• Publication date: 7 August 2024.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 07.120 (Nanotechnologies).
• Edition / version: Edition 1.0 (2024).
• Number of pages: 19 pages.

Scope

IEC TS 62607-2-6:2024 specifies measurement procedures and data-analysis approaches for evaluating the thermal diffusivity of vertically-aligned carbon nanotube films on solid substrates by the flash method. The scope includes front-side pulse irradiation (flash lamp or laser), rear-surface transient temperature measurement, requirements for sample thickness and mass-density characterization, environmental and coating considerations, and a bilayer analytical model for extracting VACNT-film diffusivity and estimating thermal conductivity where appropriate. Annexes provide worked case studies and calculation guidance.

Key topics and requirements

• Definition of the flash-method measurement geometry for VACNT films on substrates (front-side pulse, rear-surface detection).
• Requirements and recommendations for sample preparation, substrate/coating treatments and measurement environment.
• Procedures for measuring film thickness and mass density as inputs to diffusivity analysis.
• Instrumentation and pulse specifications (flash-lamp or laser pulse characteristics and rear-surface temperature sensors).
• Data analysis using a bilayer analytical model to separate film and substrate contributions and derive thermal diffusivity.
• Reporting templates and minimum information to support repeatability and inter-laboratory comparison.
• Informative annexes with case studies and guidance for estimating thermal conductivity from measured diffusivity.

Typical use and users

Intended users include nanomaterials researchers, materials characterization and metrology laboratories, nanomanufacturing process engineers, electronics packaging and thermal management engineers, and quality/acceptance teams in VACNT supply chains. The TS supports product development, process control, supplier qualification and comparative benchmarking of thermal transport properties for VACNT films used in thermal interface or heat-spreading applications.

Related standards

Relevant and related documents include other parts of the IEC 62607 series (Nanomanufacturing — Key control characteristics), notably IEC TS 62607-2-5:2022 (mass density of VACNTs by X-ray absorption) and cross-references to ISO/IEC or material-specific flash-method references such as ISO 18755:2022 (flash method for ceramics) that provide analytical and procedural context. Consult the IEC 62607 series for complementary KCC (key control characteristic) measurement methods.

Keywords

VACNT, vertically-aligned carbon nanotubes, thermal diffusivity, flash method, thermal interface materials, nanomanufacturing, key control characteristic, bilayer model, TC 113, metrology.

FAQ

Q: What is this standard?

A: IEC TS 62607-2-6:2024 is a Technical Specification from IEC that defines a standardized procedure to measure the thermal diffusivity of vertically-aligned carbon nanotube films on solid substrates using a flash (light-pulse) method.

Q: What does it cover?

A: It covers the measurement principle (front-side pulse / rear-surface transient temperature monitoring), sample preparation considerations, thickness and mass-density measurement inputs, pulse and sensor requirements, data analysis using a bilayer model, reporting requirements, and informative case studies and guidance for estimating thermal conductivity.

Q: Who typically uses it?

A: Researchers, metrology and test laboratories, nanomanufacturing engineers, electronics thermal-management teams, and standards developers or product specifiers working with VACNT-based thermal materials.

Q: Is it current or superseded?

A: It was published on 7 August 2024 and is the current Technical Specification (Edition 1.0) as published by IEC; the IEC entry shows a stability period indicating no planned change until at least 2027. There is no indication of supersession as of the publication.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62607 series “Nanomanufacturing — Key control characteristics,” which contains multiple parts addressing KCCs for carbon nanotube materials, luminescent nanomaterials, graphene-related products and other nano-enabled systems. See other parts (for example 62607-2-5) for complementary methods.

Q: What are the key keywords?

A: Thermal diffusivity; VACNT; flash method; vertically-aligned carbon nanotubes; nanomanufacturing; key control characteristic; bilayer analytical model; thermal interface material.