International Standard
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
Reference number
ISO 21068-2
Edition 2
Under publication
ISO 21068-2
Under publication (Edition 2, 2024)
Final production steps (up to seven weeks).
Will replace ISO 21068-2:2008


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.

General information

  •  : Under development
     : 2024-06
    : International Standard under publication [60.00]
  •  : 2
  • ISO/TC 33
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