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ISO 21068-4:2024

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 4: XRD methods ISO 21068-4:2024

Publication date:   Jun 10, 2024

General information

60.60 Standard published   Jun 10, 2024

ISO

ISO/TC 33 Refractories

International Standard

81.080   Refractories

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Scope

This document 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 preparations and general principles for qualitative and quantitative analyses of mineralogical phase composition. Quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN, and β’- SiAlON are described.
For quantitative determination of α-Si3N4, β-Si3N4, Si2ON2, AlN and β’-SiAlON refinement procedures based on the total nitrogen content of the sample are described.
NOTE            ISO 21068-3 is used for the analysis of the total nitrogen content of the sample.

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PUBLISHED
ISO 21068-4:2024
60.60 Standard published
Jun 10, 2024