欧洲标准局IRMM JRC 参考物质证书 BCR-301_product_information_sheet.pdf

EUROPEAN COMMISSION JOINT RESEARCH CENTRE Institute for Reference Materials and Measurements MATERIAL INFORMATION BCR®–301 MULLITE DESCRIPTION Mullite is an orthogonal aluminium silicate with the following stoichiometric composition 3Al O .2SiO . It is present in a variety of refractories rich in alumina. 2 3 2 The sample consists of approximately 50 g of granular material with a particle size from 1 to 4 mm, in a small bottle. MULLITE (3Al O .2SiO ) 2 3 2 1) Uncertainty 2) Mass fraction COMPOSITION [g/kg] [g/kg] SiO2 278 5 Al2O3 715 3 Fe2O3 < 2 n.a. CaO < 1.2 n.a. MgO < 0.5 n.a. Na2O < 1 n.a. K2O < 0.5 n.a. TiO2 < 0.5 n.a. 1) Unweighted mean of accepted mean values, independently obtained by 6 laboratories. The value is traceable to the International System of Units (SI).