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Status : Active
Standard Type : Main
Document No : ISO 23071:2021
Document Year : 2021
Pages : 7
Edition : 1
Section Volume : Refractories (ISO/TC 33.)
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.