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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
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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 -Si3N4, -Si3N4, Si2ON2, AlN, and ’- SiAlON are described.

For quantitative determination of -Si3N4, -Si3N4, Si2ON2, AlN and Â’-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.

SDO ISO: International Organization for Standardization
Document Number ISO 21068
Publication Date Jan. 1, 2024
Language en - English
Page Count 18
Revision Level
Supercedes
Committee ISO/TC 33
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