ISO 21068-1:2024 含碳化硅、氮化硅、氮氧化硅和赛隆的原材料和耐火制品的化学分析 第1部分：一般信息、术语和样品制备

标准编号：ISO 21068-1:2024

中文名称：含碳化硅、氮化硅、氮氧化硅和赛隆的原材料和耐火制品的化学分析 第1部分：一般信息、术语和样品制备

英文名称：Chemical analysis of raw materials and refractory products containing silicon-carbide, silicon-nitride, silicon-oxynitride and sialon — Part 1: General information, terminology and sample preparation

发布日期：2024-05

标准范围

本文件给出了定义并规定了用于含碳化硅原材料和耐火产品化学分析的样品制备技术，包括:A）？碳化硅原料；b）？含有碳化硅的石墨砖；c）？碳化硅砖（包括含氮化硅、氧氮化硅、sialon的砖）；d）？含有与粘土混合的碳和/或碳化硅的耐火材料；e）？含有与二氧化硅(和熔融二氧化硅)混合的碳和/或碳化硅的耐火材料；(f)？含有与高氧化铝材料混合的碳和/或碳化硅的耐火材料；(g)？含有与氧化镁(和白云石)混合的碳和/或碳化硅的耐火材料；(h)？含有与铬矿物或氧化镁混合的碳和/或碳化硅的耐火材料-铬材料；i)？含有碳和/或碳化硅的耐火材料，除了上述a)至h)中描述的那些。ISO中描述的分析项目？21068-2，ISO？21068-3和ISO 21068-4如下:—？干燥失重(LOD)；—？烧失量(LOI)；—？总碳，Ctotal；—？游离碳，Cfree；—？碳化硅，SiC；—？游离硅(Sifree)；—？游离铝(Alfree)；—？游离镁(Mgfree)；—？游离铁(Fefree)；—？二氧化硅(IV)(SiO2)；—？氧化铝(III)(Al2O3)；—？氧化铁(III)(Fe2O3)；—？氧化钛(IV)(TiO2)；—？氧化钙(CaO)；—？氧化镁(MgO)；—？氧化钠(Na2O)；—？氧化钾(K2O)；—？氧化铬(III)(Cr2O3)；—？氧化锆(IV)(ZrO2)；—？氧化硼（总硼以B2O3计算）；—？氮；—？氧气；—？氮化物(未分化的:Si3N4、AlN、BN、sialon、氧氮化物等)；—？矿物学相（XRD方法）。

This document gives definitions and specifies techniques for the preparation of samples for the chemical analysis of silicon-carbide-containing raw materials and refractory products including:

a)       SiC raw materials;

b)       graphite brick containing silicon carbide;

c)        silicon carbide brick (includes the bricks containing silicon nitride, silicon oxynitride, sialon);

d)       refractories containing carbon and/or silicon carbide mixed with clay;

e)       refractories containing carbon and/or silicon carbide mixed with silica (and fused silica);

f)         refractories containing carbon and/or silicon carbide mixed with high alumina material;

g)       refractories containing carbon and/or silicon carbide mixed with magnesia (and dolomite);

h)       refractories containing carbon and/or silicon carbide mixed with chrome mineral or magnesia-chrome materials;

i)         refractories containing carbon and/or silicon carbide except those described in a) to h) above.

The items of analysis described in ISO 21068-2, ISO 21068-3 and ISO 21068-4 are as follows:

—     loss on drying (LOD);

—     loss on ignition (LOI);

—     total carbon, C_total;

—     free carbon, C_free;

—     silicon carbide, SiC;

—     free silicon (Si_free);

—     free aluminium (Al_free);

—     free magnesium (Mg_free);

—     free iron (Fe_free);

—     silicon(IV) dioxide (SiO₂);

—     aluminium(III) oxide (Al₂O₃);

—     iron(III) oxide (Fe₂O₃);

—     titanium(IV) oxide (TiO₂);

—     calcium oxide (CaO);

—     magnesium oxide (MgO);

—     sodium oxide (Na₂O);

—     potassium oxide (K₂O);

—     chromium(III) oxide (Cr₂O₃);

—     zirconium(IV) oxide (ZrO₂);

—     boron oxide (total boron calculated as B₂O₃);

—     nitrogen;

—     oxygen;

—     nitrides (undifferentiated: Si₃N₄, AlN, BN, sialon, oxy-nitrides, etc.);

—     mineralogical phases (XRD-methods).

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