scope:

This European Prestandard applies to refractory materials in the allumino-silicate family. It is intended for the determination of the following constituents within the following range: SiO2 40 to 93 %; AL2O3 1 to 60 %; Fe2O3 0 to 10 %; TiO2 CaO 0,01 to 5%, MgO K2O 0,01 to 5 %; Na2O 0,01 to 5 %. NOTE 1: Though Fe2 O3 contents higher than 5 % are quite unusual in refractory materials, the field of application of this standard extends to 10 % Fe2O3. NOTE 2: Using FAAS, K and Na are determined inemission mode. NOTE 3: For contents in Al2O3 and SiO2 greater than 10 %, it is recommended to use.