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samedi 8 octobre 2011

Cone 4 Quintessence

EPK 20
Kaolin (Calc.) 20
Frit 3134 60
Total 100

Bentonite 2

Na2O 0.31 Al2O3 0.47 SiO2 2.46
K2O 0.00 B2O3 0.62 P2O5 0.00
MgO 0.01 TiO2 0.01
CaO 0.68 Fe2O3 0.01

Alumina:Silica ratio is 1.00:5.23
Neutral:Acid ratio is 1.00:2.28
Alk:Neut:Acid ratio is 1.00:1.09:2.47

Expansion: 77.4 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

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