Third in the world of boron product

Calcium borate

Typical quality data:
Parameters Guaranteed value
1 Mass ratio B2O3/CaO 1.20 – 1.24
2 Boron oxide (B2O3), %, min 44.5 – 46.5
3 Calcium oxide (CaO), %, min 36.5 – 37.5
4 Aluminium oxide (Al2O3), %, max 0.04
5 Iron oxide (Fe2O3), %, max 0.05
6 Silicon dioxide (SiO2), %, max 0.4
7 Manganese oxide (MnO), %, max 0.1
8 Magnesium oxide (MgO), %, max 0.3
9 Sulfur oxide (SO3), %, max 0.4
10 Sodium Oxide (Na2O), %, max 0.1
11 Potassium oxide (K2O), %, max 0.1
12 Iron (Fe), ppm, max 5
Main applications:
  • Calcium borate glasses
  • Textile fibre glass reinforcement
  • Vitreous enamels, frits and glazes
  • Slag treatment
  • Boron nitride binder
  • Fertilizers
  • Fire retardants
  • Petrochemicals additives