ivor & olive lewis on fri 8 may 09
Dear Stephani Stephenson ,
From the phase diagram Spodumene has a fusion point of 1423 deg C. (2593 F)=
.
In contrast, Potash felspar becomes an active flux when it decomposes at
1150 +/-20 deg C (2102 +/- 36 F).
If you could obtain Lithium Silicate as an auxiliary ingredient to create a
blend of 45% Lithium Monosilicate and 55% Spodumene you might induce meltin=
g
as low as 1026 deg C (1879 F).
Pumice is a rock containing silicon dioxide To incorporate it into a glaze
calc program you need to know its molecular composition. Analysis would be
dependent on composition of the original lava.
Enjoy the research,
Ivor Lewis,
Redhill,
South Australia
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