DIN 51079-2:2004 PDF

Scope: This standard specifies a method of analysing the silicon carbide (c~-SiC and l~-SiC) used, for example, as raw material for high-performance ceramics by digesting it with acid in a pressure vessel. It does not cover materials containing silicon carbide along with oxidic constituents and binders. The method can be used to determine the total contents of the trace impurities aluminium, calcium, chromium, iron, magnesium, nickel and titanium provided they are present in amounts of not less than 50 mg/kg. Other metallic trace elements can be determined provided they form a permanent solution under the digestion conditions. NOTE 1 Aluminium contents greater than I 000 mg/kg, calcium contents greater than 500 mg/kg or magnesium contents greater than 100 mg/kg may give results that are too Iow owing to the formation of sparingly soluble fluorides. NOTE 2 The aluminium, calcium, iron, magnesium, manganese and titanium contents may be determined, for example, by the methods specified in DIN EN 955-2 or DIN 51083-1 to DIN 51083-10, respectively. NOTE 3 General information on methods of digestion for specific groups of substances prior to X-ray fluorescence analysis (XRF) are given in Supplement 1 to DIN 51001-1 for materials containing oxidic constituents and binders, including silicon carbide.

DIN 51079-2:2004 history

2008 DIN EN ISO 21068-1:2008 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
2004 DIN 51079-2:2004 Testing of ceramic materials - Chemical analysis of silicon carbide used as raw material and as constituent in materials - Part 2: Pressure decomposition with acid