Submicron SiO₂ Powder: Characterization and Effects on Properties of Cement-Free Iron Ditch Castables

Table 1

Chemical composition of submicron ultrahigh-purity SiO₂ powder (wt.%).

SiO2	Al2O3	Fe2O3	CaO	MgO	Na2O	K2O	TiO2		C
99.9	0.01	0.02	0.01	0.01	0.01	0.01	0.003	0.006	0.01