ISO 21068-1:2024

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 1: General information, terminology and sample preparation

This document gives definitions and specifies techniques for the preparation of samples for the chemical analysis of silicon-carbide-containing raw materials and refractory products including: a) SiC raw materials; b) graphite brick containing silicon carbide; c) silicon carbide brick (includes the bricks containing silicon nitride, silicon oxynitride, sialon); d) refractories containing carbon and/or silicon carbide mixed with clay; e) refractories containing carbon and/or silicon carbide mixed with silica (and fused silica); f) refractories containing carbon and/or silicon carbide mixed with high alumina material; g) refractories containing carbon and/or silicon carbide mixed with magnesia (and dolomite); h) refractories containing carbon and/or silicon carbide mixed with chrome mineral or magnesia-chrome materials; i) refractories containing carbon and/or silicon carbide except those described in a) to h) above. The items of analysis described in ISO 21068-2, ISO 21068-3 and ISO 21068-4 are as follows: — loss on drying (LOD); — loss on ignition (LOI); — total carbon, Ctotal; — free carbon, Cfree; — silicon carbide, SiC; — free silicon (Sifree); — free aluminium (Alfree); — free magnesium (Mgfree); — free iron (Fefree); — silicon(IV) dioxide (SiO2); — aluminium(III) oxide (Al2O3); — iron(III) oxide (Fe2O3); — titanium(IV) oxide (TiO2); — calcium oxide (CaO); — magnesium oxide (MgO); — sodium oxide (Na2O); — potassium oxide (K2O); — chromium(III) oxide (Cr2O3); — zirconium(IV) oxide (ZrO2); — boron oxide (total boron calculated as B2O3); — nitrogen; — oxygen; — nitrides (undifferentiated: Si3N4, AlN, BN, sialon, oxy-nitrides, etc.); — mineralogical phases (XRD-methods).

Analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium, nitrure de silicium, oxynitrure de silicium et sialon — Partie 1: Informations générales, terminologie et préparation des échantillons

Le présent document donne des définitions et spécifie des techniques de préparation des échantillons pour l'analyse chimique des matières premières et des produits réfractaires contenant du carbure de silicium comprenant: a) matières premières contenant du carbure du silicium; b) brique de graphite contenant du carbure de silicium; c) brique de carbure de silicium (inclut les briques contenant du nitrure de silicium, de l’oxynitrure de silicium, du SIAlON); d) réfractaires contenant du carbone et/ou du carbure de silicium mélangés à de l’argile; e) réfractaires contenant du carbone et/ou du carbure de silicium mélangés à de la silice (et de la silice vitreuse); f) réfractaires contenant du carbone et/ou du carbure de silicium mélangés à des matériaux à haute teneur en alumine; g) réfractaires contenant du carbone et/ou du carbure de silicium mélangés à de la magnésie (ou de la dolomite); h) réfractaires contenant du carbone et/ou du carbure de silicium mélangés à des minéraux contenant du chrome ou des matériaux de magnésie-chrome; i) réfractaires contenant du carbone et/ou du carbure de silicium sauf ceux décrits ci-dessus en a) et h). L'ISO 21068-2, l'ISO 21068-3 et l'ISO 21068-4 décrivent des analyses chimiques sur: — la perte au séchage (LOD); — la perte au feu (LOI); — le carbone total, Ctotal; — le carbone libre, Clibre; — le carbure de silicium, SiC; — le silicium libre (Silibre); — l’aluminium libre (Allibre); — le magnésium libre (Mglibre); — le fer libre (Felibre); — l’oxyde de silicium (IV) (SiO2); — l’oxyde d'aluminium (Al2O3); — l’oxyde de fer (III) (Fe2O3); — l’oxyde de titane (IV) (TiO2); — l’oxyde de calcium (CaO); — l’oxyde de magnésium (MgO); — l’oxyde de sodium (Na2O); — l’oxyde de potassium (K2O); — l’oxyde de chrome (III) (Cr2O3); — l’oxyde de zirconium (ZrO2); — l’oxyde de bore (bore total calculé comme B2O3); — l’azote; — l’oxygène; — les nitrures (indifférencié: Si3N4, AlN, BN, SiAlON, oxynitrures, etc.); — les phases minéralogiques (méthodes de DRX).

General Information

• Status: Published
• Publication Date: 02-May-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: 03-May-2024
• Due Date: 08-Nov-2024
• Completion Date: 03-May-2024

Relations

• Consolidates: ISO 26082-1:2019 - Leather — Physical and mechanical test methods for the determination of soiling — Part 1: Rubbing (Martindale) method
• Effective Date: 06-Jun-2022
• Revises: ISO 21068-1:2008 - Chemical analysis of silicon-carbide-containing raw materials and refractory products — Part 1: General information and sample preparation
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 21068-1
Second edition
Chemical analysis of raw materials
2024-05
and refractory products containing
silicon-carbide, silicon-nitride,
silicon-oxynitride and sialon —
Part 1:
General information, terminology
and sample preparation
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, nitrure de silicium,
oxynitrure de silicium et sialon —
Partie 1: Informations générales, terminologie et préparation des
échantillons
Reference number
ISO 21068-1:2024(en) © ISO 2024

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ISO 21068-1:2024(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 21068-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Sampling and preparation of the test sample . 4
4.1 General .4
4.2 Sample pre-treatment .4
4.2.1 General .4
4.2.2 Crushing .4
4.2.3 Thermal pre-treatment – Drying .4
5 Preliminary analyses . 5
6 Expression of results . 5
7 Test report . 5
Bibliography . 6

© ISO 2024 – All rights reserved
iii

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ISO 21068-1:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodi
...

Norme
internationale
ISO 21068-1
Deuxième édition
Analyse chimique des matières
2024-05
premières et des produits
réfractaires contenant du carbure
de silicium, nitrure de silicium,
oxynitrure de silicium et sialon —
Partie 1:
Informations générales,
terminologie et préparation des
échantillons
Chemical analysis of raw materials and refractory products
containing silicon-carbide, silicon-nitride, silicon-oxynitride and
sialon —
Part 1: General information, terminology and sample preparation
Numéro de référence
ISO 21068-1:2024(fr) © ISO 2024

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ISO 21068-1:2024(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
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Publié en Suisse

© ISO 2024 – Tous droits réservés
ii

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ISO 21068-1:2024(fr)
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d'application . 1
2 Références normatives . 2
3 Termes et définitions . 2
4 Échantillonnage et préparation de l'échantillon d'essai . 4
4.1 Généralités .4
4.2 Pré-traitement de l'échantillon .4
4.2.1 Généralités .4
4.2.2 Broyage .4
4.2.3 Pré-traitement thermique - Séchage .5
5 Analyses préalables . 5
6 Expression des résultats . 5
7 Rapport d'essai . 5
Bibliographie . 7

© ISO 2024 – Tous droits réservés
iii

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ISO 21068-1:2024(fr)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO)
...

FINAL DRAFT
International
Standard
ISO/FDIS 21068-1
ISO/TC 33
Chemical analysis of raw materials
Secretariat: BSI
and refractory products containing
Voting begins on:
silicon-carbide, silicon-nitride,
2024-02-07
silicon-oxynitride and sialon —
Voting terminates on:
2024-04-03
Part 1:
General information, terminology
and sample preparation
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, nitrure de silicium,
oxynitrure de silicium et sialon —
Partie 1: Informations générales, terminologie et préparation des
échantillons
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 21068-1:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
FINAL DRAFT
ISO/FDIS 21068-1:2024(en)
International
Standard
ISO/FDIS 21068-1
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 1:
General information, terminology
and sample preparation
Analyse chimique des matières premières et des produits
réfractaires contenant du carbure de silicium, nitrure de silicium,
oxynitrure de silicium et sialon —
Partie 1: Informations générales, terminologie et préparation des
échantillons
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 21068-1:2024(en) © ISO 2024

© ISO 2024 – All rights reserved
ii

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ISO/FDIS 21068-1:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Sampling and preparation of the test sample . 4
4.1 General .4
4.2 Sample pre-treatment .4
4.2.1 General .
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ISO/TC 33
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Secretariat: BSI .
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draft edition
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2023-12-1
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Date: 2024-xx
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Chemical analysis of raw materials and refractory products
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containing silicon-carbide, silicon-nitride, silicon-oxynitride and
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sialon —
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Part 1:
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Partie 1: Informations générales, terminologie et préparation des échantillons
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ISO/FDIS 21068-1:2023(E2024(en)
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ISO/FDIS 21068-1:2023(E2024(en)
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Introduction . vi
1 Scope . 1
2 Normative references . 2
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4 Sampling and preparation of the test sample .
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