標準號：BS EN ISO 21068-1-2008
中文標準名稱：含碳化硅的原材料和耐火制品的化學分析.一般信息和樣品制備
英文標準名稱：Chemical analysis of silicon-carbide-containing raw materials and refractory products -Part 1: General information and sample preparation
標準類型：Q41
發布日期：2008/9/30 12:00:00
實施日期：2008/9/30 12:00:00
中國標準分類號：Q41
國際標準分類號：81.080
引用標準：ISO 31-0;ISO 5022;ISO 8656-1;ISO 12677-2003;EN 12698-2;ISO 21068-2-2008
適用范圍：This part of ISO 21068 gives definitions and specifies techniques for the preparation of samples for thechemical analysis of silicon-carbide-containing raw materials and refractory products including:a) graphite brick containing silicon carbide;b) silicon carbide brick (includes the bricks containing silicon nitride);c) refractories containing carbon and/or silicon carbide mixed with clay;d) refractories containing carbon and/or silicon carbide mixed with silica (and fused silica);e) refractories containing carbon and/or silicon carbide mixed with high alumina material;f) refractories containing carbon and/or silicon carbide mixed with magnesia (and dolomite);g) refractories containing carbon and/or silicon carbide mixed with chrome mineral or magnesia-chromematerials;h) refractories containing carbon and/or silicon carbide except those described in a) to g) above.The items of chemical analysis described in ISO 21068, Parts 1 to 3 are as follows:1) loss on drying (LOD);2) loss on ignition (LOI);3) total carbon, Ctotal;4) free carbon, Cfree;5) silicon carbide, SiC;6) free silicon (Sifree);7) free aluminium (Alfree);8) free magnesium (Mgfree);9) free iron (Fefree);10) silicon(IV) oxide (SiO2);11) aluminium oxide (Al2O3);12) iron(III) oxide (total iron oxide calculated as Fe2O3);13) titanium(IV) oxide (TiO2);14) calcium oxide (CaO);15) magnesium oxide (MgO);16) sodium oxide (Na2O);17) potassium oxide (K2O);18) chromium(III) oxide (Cr2O3);19) zirconium oxide (ZrO2);20) boron oxide (total boron calculated as B2O3);21) nitrogen;22) oxygen;23) nitrides (undifferentiated: Si3N4, AlN, BN, sialon, oxy-nitrides, etc.).