|
Standard
ISO 21068-2
Second edition
Chemical analysis of raw materials
2024-06
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
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
Reference number
ISO 21068-2:2024(en) © ISO 2024
---------------------- Page: 1 ----------------------
ISO 21068-2:2024(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: +41 22 749 01 11
Email: [email protected]
Website: www.iso.org
Published in Switzerland
© ISO 2024 – All rights reserved
ii
---------------------- Page: 2 ----------------------
ISO 21068-2:2024(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Determination of volatile components by gravimetric methods . 1
4.1 General .1
4.2 Determination of the loss on drying at 250 °C (w ) .2
LOD250
4.2.1 Principle .2
4.2.2 Apparatus .2
4.2.3 Procedure .2
4.2.4 Calculation .2
4.3 Determination of the loss on ignition in argon (w ) .2
LOIAr
4.3.1 Principle .2
4.3.2 Apparatus .3
4.3.3 Test assembly .3
4.3.4 Reagents .
...