NF EN ISO 21068-2

NF EN ISO 21068-2

June 2024
Standard Current

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 2 : determination of volatile components, total carbon, free carbon, silicon carbide, total and free silicon, free and surface silica

This document specifies analytical techniques for the determination of volatile components by thermal treatment at specified temperatures, and methods for the determination of the total carbon, free carbon, silicon carbide, total and free silicon and free and surface silica content of silicon-carbide, silicon-nitride and silicon-oxynitride containing raw materials and refractory products.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2024

Number of pages

48 p.

Reference

NF EN ISO 21068-2

ICS Codes

81.080   Refractories

Classification index

B49-423-2

Print number

1

International kinship

ISO 21068-2:2024

European kinship

EN ISO 21068-2:2024
Sumary
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 2 : determination of volatile components, total carbon, free carbon, silicon carbide, total and free silicon, free and surface silica

This document specifies analytical techniques for the determination of volatile components by thermal treatment at specified temperatures, and methods for the determination of the total carbon, free carbon, silicon carbide, total and free silicon and free and surface silica content of silicon-carbide, silicon-nitride and silicon-oxynitride containing raw materials and refractory products.

Replaced standards (1)
NF EN ISO 21068-2
October 2008
Standard Cancelled
Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 2 : determination of loss on ignition, total carbon, free carbon and silicon carbide, total and free silica and total and free silicon

ISO 21068-2:2008 specifies analytical techniques for the determination of change in mass by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, silicon, total silica and free silica content of silicon-carbide-containing raw materials and refractory products.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Dosage des composés volatils par des méthodes gravimétriques
  • 5 Détermination de la teneur en carbone total
  • 6 Détermination de la teneur en carbone libre
  • 7 Détermination de la teneur en carbure de silicium
  • 8 Détermination de la teneur en silicium total
  • 9 Détermination de la teneur en silicium libre
  • 10 Détermination de la teneur en silice libre
  • 11 Détermination de la teneur en silice superficielle
  • 12 Expression des résultats
  • 13 Rapport d'essai
  • A Données de fidélité
  • B Exemples de matériaux de référence certifiés pour l'étalonnage de l'analyseur de carbone
  • C Correction de la teneur en carbone libre en cas d'oxydation du SiC
  • Bibliographie
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