British Standards Institution

Source:: CEN
Committee:: RPI/1 - Refractory products and materials
Categories:: Information management | Standardization. General rules | Manufacturing | Chemical technology | Chemical analysis

Scope

As per ISO document i.e.

This standard describes methods for the determination of mineralogical phases typically apparent in nitride and oxy-nitride bonded silicon carbide refractory products using a Bragg-Brentano diffractometer. It includes details of sample preparation and general principles for qualitative and quantitative analysis of mineralogical phase composition. Quantitative determination of -Si3N4, - Si3N4, Si2ON2, AlN, and SiAlON are described. NOTE For the refinement procedures the total nitrogen content, analysed in accordance with ISO 21068-3 is needed.

Purpose

Note : This CEN WI is requested to develop ISO/AWI 21068-4, ISO id 83603, under the Vienna Agreement process (ISO lead) which is proposed as the chemical methods of ISO 21068 series and EN 12698-1 are being merged together. Therefore, it is proposed to implement the XRD methods of EN 12698-2 also as part 4 of the ISO 21068 series. The content of EN 12698-2 will not be changed.

Comment on proposal

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

06/12/2022

Proposal end date:

14/01/2023

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

N614 - NWI for CEN to develop ISOAWI 21068-4 under VA Chemical analysis of raw materials and refractory products containing silicon carbide, silicon nitride, silicon oxynitride and sialon — Part 4: XRD methods

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