jeudi 13 octobre 2011

Cone 4 #25 Quintessence

Custer feldspar 48
Zinc oxide (Calc.) 9
Whiting 19
EPK 14
Silica 6
Frit 3134 4
Total 100

Na2O 0.07 Al2O3 0.33 SiO2 1.97
K2O 0.13 B2O3 0.03 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.52 Fe2O3 0.00
ZnO 0.28

Alumina:Silica ratio is 1.00:5.92
Neutral:Acid ratio is 1.00:5.39
Alk:Neut:Acid ratio is 1.00:0.37:1.98

Expansion: 83.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

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