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This document describes methods for the determination of mineralogical phases often present as additives or reaction products in carbon containing or graphitic refractory products by X-ray Diffraction (XRD) 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 α-Si3N4, β-Si3N4, AlN, aluminium metal, Al4C3, silicon metal, boron carbide and BN are described. The problems encountered with some determinations are highlighted.

Additional reduced species present in some refractories could include Al2O3⋅AlN solid solutions (so called Alons), Si3N4⋅SiO2 solid solutions and Si3N4⋅Al2O3 solid solutions (Sialons). The presence of some of these solid solution components will cause problems with both identification and quantification as they are not well-defined structures.

NOTE      For rationalisation of nitrogen containing phases, the total nitrogen content, analysed in accordance with EN 12698-1 is used.


Общая информация 

  • Текущий статус
     : Опубликовано
    Дата публикации
     : 2021-04
  • Версия
     : 1
  • Технический комитет
     : ISO/TC 33 Refractories
  • ICS
     :
    81.080 Refractories

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  2. Интернет-магазин
  3. Каталог стандартов
  4. ТК
  5. ISO/TC 33
  6. ISO 23071:2021