prEN ISO 21068-1

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 1: General information and sample preparation (ISO/DIS 21068-1:2023)

This part of ISO 21068 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 g) above.
The items of chemical analysis described in ISO 21068, Parts 1 to 4 are as follows:
1)   loss on drying (LOD);
2)   loss on ignition (LOI);
3)   total carbon, Ctotal;
4)   free carbon, Cfree;
5)   silicon carbide, SiC;
6)   free silicon (Sifree);
7)   free aluminium (Alfree);
8)   free magnesium (Mgfree);
9)   free iron (Fefree);
10)   silicon(IV) dioxide (SiO2);
11)   aluminium oxide (Al2O3);
12)   iron(III) oxide (total iron oxide calculated as Fe2O3);
13)   titanium(IV) oxide (TiO2);
14)   calcium oxide (CaO);
15)   magnesium oxide (MgO);
16)   sodium oxide (Na2O);
17)   potassium oxide (K2O);
18)   chromium(III) oxide (Cr2O3);
19)   zirconium oxide (ZrO2);
20)   boron oxide (total boron calculated as B2O3);
21)   nitrogen;
22)   oxygen;
23)   nitrides (undifferentiated: Si3N4, AlN, BN, sialon, oxy-nitrides, etc.);
24)   XRD-methods.

Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliziumcarbid, Siliziumnitrid, Siliziumoxynitrid und Sialon enthalten - Teil1: Allgemeine Angaben und Probenvorbereitung (ISO/DIS 21068-1:2023)

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 et préparation des échantillons (ISO/DIS 21068-1:2023)

Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid, silicijev nitrid, silicijev oksinitrid in sialon - 1. del: Splošne informacije in priprava vzorcev (ISO/DIS 21068-1:2023)

General Information

• Status: Not Published
• Publication Date: 24-Dec-2024
• ICS: 81.080 - Refractories
• Technical Committee: CEN/TC 187 - Refractory products and materials
• Drafting Committee: CEN/TC 187/WG 4 - Chemical analysis
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 30-Nov-2023
• Completion Date: 30-Nov-2023
• Ref Project: oSIST prEN ISO 21068-1:2023 - Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 1: General information and sample preparation (ISO/DIS 21068-1:2023)

Relations

• Revises: EN ISO 21068-1:2008 - Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 1: General information and sample preparation (ISO 21068-1:2008)
• Effective Date: 17-Nov-2021

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 21068-1:2023
01-julij-2023
Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid,
silicijev nitrid, silicijev oksinitrid in sialon - 1. del: Splošne informacije in priprava
vzorcev (ISO/DIS 21068-1:2023)
Chemical analysis of raw materials and refractory products containing silicon-carbide,
silicon-nitride, silicon-oxynitride and sialon - Part 1: General information and sample
preparation (ISO/DIS 21068-1:2023)
Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliziumcarbid,
Siliziumnitrid, Siliziumoxynitrid und Sialon enthalten - Teil1: Allgemeine Angaben und
Probenvorbereitung (ISO/DIS 21068-1:2023)
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 et préparation des échantillons (ISO/DIS 21068-1:2023)
Ta slovenski standard je istoveten z: prEN ISO 21068-1
ICS:
71.040.40 Kemijska analiza Chemical analysis
81.080 Ognjevzdržni materiali Refractories
oSIST prEN ISO 21068-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 21068-1:2023

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oSIST prEN ISO 21068-1:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-1
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-06-01 2023-08-24
Chemical analysis of raw materials and refractory products
containing silicon-carbide, silicon-nitride, silicon-
oxynitride and sialon —
Part 1:
General information and sample preparation
ICS: 81.080
This document is circulated as received from the committee secretariat.
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oSIST prEN ISO 21068-1:2023

DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-1
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:

Chemical analysis of raw materials and refractory products
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oxynitride and sialon —
Part 1:
General information and sample preparation
ICS: 81.080
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oSIST prEN ISO 21068-1:2023
ISO/DIS 21068-1:2023(E)
Contents Page
Foreword .iv
Introduction .
...