UNE EN 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)
Análisis químico de materias primas y de productos refractarios que contengan carburo de silicio, nitruro de silicio, oxinitruro de silicio y sialón. Parte 4: Métodos de DRX (ISO 21068-4:2024) (Ratificada por la Asociación Española de Normalización en agosto de 2024.)
| Označení normy: | UNE EN ISO 21068-4:2024 |
| Počet stran: | 21 |
| Vydáno: | 2024-08-01 |
| Status: | Norma |
UNE EN ISO 21068-4:2024
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, ²-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.