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Pearl Ash

Formula: K2CO3
Alternate Names: Potassium Carbonate, K2CO3, Pearlash

OxideAnalysisFormula
K2O68.16%1.000
CO231.84
Oxide Weight94.20
Formula Weight138.20
If this formula is not unified correctly please contact us.
DENS - Density (Specific Gravity) 2.30
GSPT - Frit Softening Point 896C M

This is the only material in ceramics that can deliver K2O in the exact amount required without bringing other oxides with it, however it is water soluble. The most common source of K2O in glazes is feldspar and normally all of the oxides that feldspar supplies are also needed in glazes (so it is rare that pure and much more expensive K2O is needed). Sometimes this is used to modify the color in glazes.

In the manufacture of frits, pearl ash can be an important source of potassium.


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By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Pearl Ash" descrip="" searchkey="Potassium Carbonate, K2CO3, Pearlash" loi="0.00" casnumber="584-08-7"> <oxides> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="68.160" tolerance=""/> </oxides> <volatiles> <volatile symbol="CO2" name="Carbon Dioxide" percent="31.840" tolerance=""/> </volatiles> </material>


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