Ceramic – Glass
Raw materials for Glass Manufacturing:
Having seen the processing methods of silica sand, we shall now see the desired specification of silica sand for different varieties of glass.
Specification of Silica Sand for Optical Glass
Silica (SiO2) —————————– 99.5% (Min)
Iron Oxide (Fe2O3) ——————– 0.008% (Max)
Titanium (TiO2) ———————— 0.030% (Max)
Cr2O3 ———————————— 0.0002% (Max)
Specification of Silica Sand for Higher Grade Decorative Glass
Silica (SiO2) —————————– 99.5% (Min)
Iron Oxide (Fe2O3) ——————– 0.013% (Max)
Cr2O3 ———————————— 0.0002% (Max)
Specification of Silica Sand for Colourless Container Glass
Silica (SiO2) —————————– 98.5% (Min)
Iron Oxide (Fe2O3) ——————– 0.030% (Max)
Cr2O3 ———————————— 0.0006% (Max)
To be Contd…..
