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Bulletin of the National Research Centre

Table 3 Chemical composition of the design batch no. 2

From: Flux ceramic tiles based on Egyptian trachyte

Oxides %

20% trachyte

80% clay

Total

SiO2

12.36

42.38

54.74

Al2O3

3.34

23.26

26.60

TiO2

0.04

1.18

1.22

Fe2O3

0.10

3.14

3.24

CaO

0.22

0.4

0.62

MgO

0.06

0.16

0.22

Na2O

1.60

0.05

1.65

K2O

0.87

0.22

1.09

SO3

0.01

0.61

0.62

ZrO2

0.05

–

0.05

LOI

0.32

8.50

8.82

Total

18.97

79.90

98.87

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