標準號：DIN 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.第1部分: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 (ISO 21068-1:2008); English version of DIN EN ISO 21068-1:2008-12
標準類型：Q41
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 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;ISO 21068-2-2008;EN 12698-2
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-chrome materials;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 (AI203);12) iron(Ill) oxide (total iron oxide calculated as Fe203);13) titanium(IV) oxide (TiO2);14) calcium oxide (CaO);15) magnesium oxide (MgO);16) sodium oxide (Na20);17) potassium oxide (K20);18) chromium(Ill) oxide (Cr203);19) zirconium oxide (ZrO2);20) boron oxide (total boron calculated as B203);21) nitrogen;22) oxygen;23) nitrides (undifferentiated: Si3N4, AIN, BN, sialon, oxy-nitrides, etc.).