METAKAOLIN

Metakaolin is ground, thermally processed washed kaolin. It is used as an additive to refractory materials, concretes and mortars, as a filling agent to rubber and plastics as well as for further applications.

Typical properties
Al2O3 %                 40 - 42
SiO2 %                   51 - 53
Fe2O3 %               1,2 - 1,4
TiO2 %                  0,7 - 0,75
K2O + Na2O %  1,35 - 1,45
CaO %                 0,25 - 0,30
MgO %                 0,35 - 0,40
Further not specified oxides % ca 0,5
Annealing loss (1100°C) % ca 1,5
Specific surface m2.g-1  
   
Informative properties
Distribution of corn
Sedigraph                       20 - 40 µm » 2,5%                            2 - 5 µm » 15,5%
                                          10 - 20 µm » 9,6%                            1 - 2 µm » 18,1%
                                             5 - 10 µm » 27,4%                            < 1 µm » 26,9%

Screen residue 0,063 µm % ca 1,0
 0,040 µm % ca 1,8
Oil number g/100 l ca 63
Whiteness (R 457) % ca 71
Mass activity Ra226 Bq/kg  100
Mass activity index I -  0,8