ISO 23071:2021 耐火制品 用XRD法测定含碳耐火材料中的还原物种
标准编号：ISO 23071:2021
中文名称：耐火制品 用XRD法测定含碳耐火材料中的还原物种
英文名称：Refractory products — Determination of reduced species in carbon containing refractories by XRD
发布日期：2021-04
标准范围
本文件描述了使用Bragg-Brentano衍射仪通过X射线衍射(XRD)测定含碳或石墨耐火产物中通常作为添加剂或反应产物存在的矿物学相的方法。它包括样品制备的细节以及矿物学相组成定性和定量分析的一般原则。介绍了α-Si3N4、β-Si3N4、AlN、金属铝、Al4C3、金属硅、碳化硼和BN的定量测定。重点介绍了一些测定中遇到的问题。一些耐火材料中存在的其他还原物质可能包括Al2O3？AlN固溶体（所谓的Alons），Si3N4？SiO2固溶体和Si3N4？Al2O3固溶体（赛隆）。这些固溶体组分中的一些的存在将导致鉴定和定量的问题，因为它们不是很好-定义的结构。笔记？为了使含氮相合理化，根据EN？使用12698-1。
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.
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