... materials as follows: feldspar, clay, kaolin, limestone, dolomite, calcite, bauxite, quartz and other.Determination scope of each component are: SiO2 0 ... %; TiO2 0.10 ~ 15.00% ; MgO 0.10 ~ 60.00% , quartz (SiO2> 98.00%, platinum crucible are needed here); zircon in ...