FprEN ISO 21068-2

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 (ISO/FDIS 21068-2:2024)

This part of ISO 21068 specifies analytical techniques for the determination of volatile components by thermal treatment at specified temperatures, and methods for the determination of the total carbon content, free carbon, silicon carbide, total and free silicon and free and surface silica content of silicon carbide, silicon nitride, silicon oxynitride and sialon containing raw materials and refractory products.

Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliciumcarbid, Siliciumnitrid, Siliciumoxinitrid und Sialon enthalten - Teil2: Bestimmung des Gehaltes an flüchtigen Bestandteilen, Gesamtkohlenstoff, freiem Kohlenstoff, Siliziumcarbid, gesamtem und freiem Silizium, freiem und anhaltendem Siliziumdioxid (ISO/FDIS 21068-2:2024)

Dieses Dokument legt Analysenverfahren für die Bestimmung flüchtiger Bestandteile durch Wärme-behandlung bei festgelegten Temperaturen, sowie Verfahren für die Bestimmung des Gehaltes an Gesamtkohlenstoff, freiem Kohlenstoff, Siliciumcarbid, gesamtem und freiem Silicium sowie des Gehaltes an freiem und anhaftendem Silicium(IV)  von Siliciumcarbid, Siliciumnitrid und Siliciumoxinitrid enthaltenden Rohstoffen und feuerfesten Erzeugnissen fest.

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 2: Dosage des composés volatils, du carbone total, du carbone libre, du carbure de silicium, du silicium total et libre et de la silice libre et superficielle (ISO/FDIS 21068-2:2024)

Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid, silicijev nitrid, silicijev oksinitrid in sialon - 2. del: Določevanje hlapnih sestavin, celotnega ogljika, prostega ogljika, silicijevega karbida, celotnega in prostega silicija, prostega in površinskega silicija (ISO/DIS 21068-2:2023)

General Information

• Status: Not Published
• Publication Date: 22-Jul-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: 5060 - Closure of Vote - Formal Approval
• Start Date: 23-Apr-2024
• Completion Date: 23-Apr-2024
• Ref Project: kSIST FprEN ISO 21068-2:2024 - 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 (ISO/DIS 21068-2:2023)

Relations

• Revises: EN ISO 21068-2:2008 - 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)
• Effective Date: 17-Nov-2021

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 21068-2:2023
01-julij-2023
Kemijska analiza surovin in ognjevzdržnih izdelkov, ki vsebujejo silicijev karbid,
silicijev nitrid, silicijev oksinitrid in sialon - 2. del: Določevanje hlapnih sestavin,
celotnega ogljika, prostega ogljika, silicijevega karbida, celotnega in prostega
silicija, prostega in površinskega silicija (ISO/DIS 21068-2:2023)
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 (ISO/DIS 21068-2:2023)
Chemische Analyse von Rohstoffen und feuerfesten Erzeugnissen, die Siliciumcarbid,
Siliciumnitrid, Siliciumoxinitrid und Sialon enthalten - Teil2: Bestimmung des Gehaltes an
flüchtigen Bestandteilen, Gesamtkohlenstoff, freiem Kohlenstoff, Siliziumcarbid,
gesamtem und freiem Silizium, freiem und anhaltendem Siliziumdioxid (ISO/DIS 21068-
2:2023)
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
2: Dosage des composés volatils, du carbone total, du carbone libre, du carbure de
silicium, du silicium total et libre et de la silice libre et superficielle (ISO/DIS 21068-
2:2023)
Ta slovenski standard je istoveten z: prEN ISO 21068-2
ICS:
71.040.40 Kemijska analiza Chemical analysis
81.080 Ognjevzdržni materiali Refractories
oSIST prEN ISO 21068-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 21068-2:2023

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oSIST prEN ISO 21068-2:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-2
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-06-02 2023-08-25
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
ICS: 81.080
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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NATIONAL REGULATIONS.
ISO/DIS 21068-2:2023(E)
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oSIST prEN ISO 21068-2:2023

DRAFT INTERNATIONAL STANDARD
ISO/DIS 21068-2
ISO/TC 33 Secretariat: BSI
Voting begins on: Voting terminates on:

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
ICS: 81.080
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
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FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
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