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Clay Ex. Ukraine   

1) Ball clays for ceramic tile body:




Parameter ChPK-1 grade Ch-3 grade
Al2O3, % 22-25 27-29
Fe2O3, % 1.0-1.2 1.0-1.3
TiO2, % 1.0-1.4 1.0-1.4
K2O, % 2.05 2.00
Na2O, % 0.50 0.50
CaO, % 0.30 0.45
MgO, % 0.50 0.55
Organic carbon, % 0.1-0.25 0.1-0.35
Moisture, % 18 (+/-4) 18 (+/-4)
Ceramic properties
Parameter ChPK-1 grade Ch-3 grade
Aver. Min. Max. Aver. Min. Max.
Flowability, sec 17.8 17.2 19.9 35,8 34 40
Modulus of rupture, N/mm2 7.2 6.9 7.68 7,7 7,5 7,9
Shrinkage, % 5.9 5.55 6.79 6,9 6,5 7,5
Water absorption, % 0.63 0.3 1.15 0,25 0,2 0,31
L.O.I., % 6.17 5.33 7.34 7,51 6,09 8,51


Particle size distribution
Size, mcn ChPK-1 grade Ch-3 grade
10 94,5 94,5
5 87,6-93,7 87,6-93,7
2 73,6-81,8 73,6-81,8
1 65,6-73,8 65,6-73,8
0,5 57,0-64,0 57,0-64,0
0,3 52,4 52,4

Mineral composition
Mineral / clay grade ChPK-1 grade Ch-3 grade
Kaolinite 40% 44%
Quartz 36% 25%
Illite 22% 29%
Smectite 2% 2%

     Note: data on calcined matter


 
Whiteness





ChPK-1 grade
Ch-3 grade
L 75 74.5
a 3.3 2.94
b 16.4 16.96
Note: whiteness was determined at 1200 degrees Centigrade with 6 min exposure.


 
2) Clays for production of glazes:

   
 
Parameter Ch-0 grade Ch-1 grade
SiO2 52-60 53.5-61
Al2O3, % 33-35 32-33
Fe2O3, % 0.8-1.3 1.0-1.6
TiO2, % 0.6-1.6 0.6-1.6
Na2O + K2O, % 2.3-2.7 2.3-2.7
CaO, % 0.3-0.9 0.3-0.9
MgO, % 0.3-0.82 0.3-0.87
Physical and mechanical properties
Parameter Ch-0 grade Ch-1 grade
Moisture at pressing, % 6.5-7.5
Dry bending strength , kg/cm2 80.1 77.7
Water absorption (at 1210°C), % 0-0.8
Linear shrinkage after firing (at 1210°C) 8.7 8.24
L.O.I., % 9-14 8.5-16.5
LResidue on sieve 0063 Traces to 0.4 0.2 to 1.2



                                            
Particle size distribution 
Size, mcn Ch-0 grade Ch-1 grade
10 94,5 94,5
5 87,6-93,7 87,6-93,7
2 73,6-81,8 73,6-81,8
1 65,6-73,8 65,6-73,8
0,5 57,0-64,0 57,0-64,0
0,3 52,4 52,4

Note: data on calcined matter



 

 

Whiteness



Ch-0 grade
Ch-1 grade
L 83.71 77.36
a 2.11 2.47
b 14.93 14.34
The materials can be supplied also in milled form (<1 mm – 100%, <0.5 mm – 70%).

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