NF EN ISO 21068-3

NF EN ISO 21068-3

June 2024
Standard Current

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 3 : determination of nitrogen, oxygen and metallic and oxidic constituents

This document specifies analytical techniques for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and metallic and oxidic components in silicon carbide 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

34 p.

Reference

NF EN ISO 21068-3

ICS Codes

81.080   Refractories

Classification index

B49-423-3

Print number

1

International kinship

ISO 21068-3:2024

European kinship

EN ISO 21068-3:2024
Sumary
Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 3 : determination of nitrogen, oxygen and metallic and oxidic constituents

This document specifies analytical techniques for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and metallic and oxidic components in silicon carbide raw materials and refractory products.

Replaced standards (1)
NF EN ISO 21068-3
October 2008
Standard Cancelled
Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 3 : determination of nitrogen, oxygen and metallic and oxidic constituents

ISO 21068-3:2008 specifies methods for the determination of total nitrogen and nitrogen calculated as silicon nitride, total oxygen, and free metallic and oxidic components in silicon carbide raw materials and refractory products. It applies only to silicon carbide materials that are not bonded with nitrogen. Nitride-bonded silicon carbide refractories are covered in EN 12698-1.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Dosage de l'azote et de l'oxygène
  • 5 Dosage du fer soluble par extraction avec de l'acide chlorhydrique, suivi d'une analyse par spectroscopie d'émission optique avec plasma induit par haute fréquence (ICP-OES)
  • 6 Dosage de l'aluminium (libre) métallique par la méthode de génération d'hydrogène
  • 7 Dosage du magnésium et de l'aluminium soluble dans l'acide
  • 8 Dosage des impuretés élémentaires dans les matières premières à base de SiC
  • 9 Expression des résultats
  • 10 Rapport d'essai
  • A Données de fidélité
  • Bibliographie
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