ISO 21068-3:2024

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.

Analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium, du nitrure de silicium, de l’oxynitrure de silicium et du SiAlON — Partie 3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés

Ce document spécifie des techniques analytiques permettant de doser l’azote total et l’azote calculés sous forme de nitrure de silicium, l’oxygène total et les composés métalliques et oxydés dans les matières premières et produits réfractaires de carbure de silicium.

General Information

• Status: Published
• Publication Date: 09-Jun-2024
• ICS: 81.080 - Refractories
• Technical Committee: ISO/TC 33 - Refractories
• Drafting Committee: ISO/TC 33 - Refractories
• Current Stage: 6060 - International Standard published
• Start Date: 10-Jun-2024
• Due Date: 08-Nov-2024
• Completion Date: 10-Jun-2024

Relations

• Consolidates: ISO 8521:2020 - Glass-reinforced thermosetting plastic (GRP) pipes — Test methods for the determination of the initial circumferential tensile wall strength
• Effective Date: 06-Jun-2022
• Revises: ISO 21068-3:2008 - Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 3: Determination of nitrogen, oxygen and metallic and oxidic constituents
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 21068-3
Second edition
Chemical analysis of raw materials
2024-06
and refractory products containing
silicon-carbide, silicon-nitride,
silicon-oxynitride and sialon —
Part 3:
Determination of nitrogen, oxygen
and metallic and oxidic constituents
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, du nitrure de
silicium, de l’oxynitrure de silicium et du SiAlON —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants
métalliques et oxydés
Reference number
ISO 21068-3:2024(en) © ISO 2024

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ISO 21068-3:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

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ISO 21068-3:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Determination of nitrogen and oxygen. 2
4.1 General .2
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal
conductivity (TC) and infrared (IR) absorption detection .2
4.2.1 Principle .2
4.2.2 Reagents .3
4.2.3 Apparatus .3
4.2.4 Nickel pre-treatment .3
4.2.5 Calibration . . .4
4.2.6 Procedure .4
4.2.7 Precision .5
4.3 Determination of total nitrogen content by fusion decomposition .5
4.3.1 General .
...

Norme
internationale
ISO 21068-3
Deuxième édition
Analyse chimique des matières
2024-06
premières et des produits
réfractaires contenant du carbure
de silicium, du nitrure de silicium,
de l’oxynitrure de silicium et du
SiAlON —
Partie 3:
Dosage de l'azote, de l'oxygène et des
constituants métalliques et oxydés
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
Numéro de référence
ISO 21068-3:2024(fr) © ISO 2024

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ISO 21068-3:2024(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2024
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse

© ISO 2024 – Tous droits réservés
ii

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ISO 21068-3:2024(fr)
Sommaire Page
Avant-propos .v
Introduction .vi
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 2
4 Dosage de l’azote et de l’oxygène . 2
4.1 Généralités .2
4.2 Dosage combiné de l’oxygène et de l’azote au moyen d’un analyseur avec détection
d’absorption infrarouge et conductivité thermique .2
4.2.1 Principe.2
4.2.2 Réactifs .3
4.2.3 Appareillage.3
4.2.4 Traitement préalable du nickel .4
4.2.5 Étalonnage .4
4.2.6 Mode opératoire . .4
4.2.7 Fidélité .5
4.3 Dosage de l’azote total par décomposition par fusion .5
4.3.1 Généralités .
...

FINAL DRAFT
International
Standard
ISO/FDIS 21068-3
ISO/TC 33
Chemical analysis of raw materials
Secretariat: BSI
and refractory products containing
Voting begins on:
silicon-carbide, silicon-nitride,
2024-02-28
silicon-oxynitride and sialon —
Voting terminates on:
2024-04-24
Part 3:
Determination of nitrogen, oxygen
and metallic and oxidic constituents
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, du nitrure de
silicium, de l’oxynitrure de silicium et du SiAlON —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants
métalliques et oxydés
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 21068-3:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
FINAL DRAFT
ISO/FDIS 21068-3:2024(en)
International
Standard
ISO/FDIS 21068-3
ISO/TC 33
Chemical analysis of raw materials
Secretariat: BSI
and refractory products containing
Voting begins on:
silicon-carbide, silicon-nitride,
silicon-oxynitride and sialon —
Voting terminates on:
Part 3:
Determination of nitrogen, oxygen
and metallic and oxidic constituents
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, du nitrure de
silicium, de l’oxynitrure de silicium et du SiAlON —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants
métalliques et oxydés
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
COPYRIGHT PROTECTED DOCUMENT
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 21068-3:2024(en) © ISO 2024

© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/FDIS 21068-3:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Determination of nitrogen and oxygen. 2
4.1 General .2
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal
conductivity (TC) and infrared (IR) absorption detection .
...

Restricted

ISO/DISFDIS 21068-3:2023(E)
ISO/TC 33
Secretariat: BSI
draft edition
2023-08
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
Analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium, du
nitrure de silicium, de l’oxynitrure de silicium et du sialon —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydiquesSiAlON —
Partie 3: Dosage de l'azote, de l'oxygène et des constituants métalliques et oxydés
FDIS stage

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Restricted
ISO/DISFDIS 21068-3:2023(E2024(en)
© ISO 20232024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO'sISO’s member body in the country of the requester.
ISO Copyright Officecopyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
E-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
© ISO 2024 – All rights reserved

ii

---------------------- Page: 2 ----------------------
Restricted
ISO/DISFDIS 21068-3:2023(E2024(en)
Contents Page
Foreword . vii
Introduction . ix
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Determination of nitrogen and oxygen . 2
4.1 General . 2
4.2 Combined determination of nitrogen and oxygen by an analyser with thermal conductivity (TC) and
infrared (IR) absorption detection . 3
4.2.1 Principle . 3
4.2.2 Reagents . 3
4.2.3 Apparatus . 4
4.2.4 Nickel pre-treatment . 4
4.2.5 Calibration . 4
4.2.6 Procedure . 4
4.2.7 Precision . 5
4.3 Determination of total nitrogen content by fusion decomposition . 5
4.3.1 General.
...