Chemical Analysis of Refractories Containing Silicon-Carbide, Silicon-Nitride, Silicon-Oxynitride and Sialon—Part 3: Determination of Nitrogen, Oxygen and Metallic and Oxidic Constituents (Draft for Comments)

This document is intended for manufacturers, testing bodies and related laboratories dealing with refractories containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon. It specifies terms and definitions, methods for determining total nitrogen, total oxygen, metallic and oxidic constituents, as well as requirements for expression of results and test reports, and applies to the above refractories. The document provides TC-IR combined analysis, fusion decomposition, Kjeldahl distillation, ICP-OES, gas volumetric methods and related impurity determination methods, and requires sample preparation and drying, instrument calibration, blank tests and parallel determinations, calculation of results and issuance of test reports. As a draft for comments, the drafting notes recommend implementation 6 months after approval and publication.