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FprEN ISO 21068-4

Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon - Part 4: XRD methods (ISO/FDIS 21068‑4:2024) FprEN ISO 21068-4

Publication date:   Feb 29, 2024

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50.60 Close of voting. Proof returned by secretariat   Apr 23, 2024

CEN

CEN/TC 187 Refractory products and materials

European Norm

81.080   Refractories

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Scope

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.

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FprEN ISO 21068-4
50.60 Close of voting. Proof returned by secretariat
Apr 23, 2024