CHEMICAL ANALYSIS

SiO2

52 - 53 %

Al2O3

42 - 44 %

Fe2O3

1,0 %

TiO2

0,08 %

CaO

0,1 %

MgO

0,1 %

K2O

1,5 - 2 %

Na2O

0,1 %  

X-ray mineralogic analysis:

Mullite

56 %

Amorphous silicon glass

44 %

Pyroscopic exam:

Softening temperature

 Upper to the cone 35 - 1770°C

Linear thermal expansion:

From 20° - 1000°C

 4,44 x 10exp-6

Softening under load – Initial deformation:

Cone 34 - 35

1750°C / 1770°C

Real specific weight

2,70

Real porosity

6 - 8 %

Hardness

7 - 8 Mohs

Shipment packing density

Molochite in grains 1200 / 1320 kg/m3