Sodium Carbonate
The most common form of sodium carbonate
Formula: Na2CO3 or Na2O.CO2
| DENS - Density (Specific Gravity) |
1.44 |
| MLPT - Melting Point (MP) |
34C D |
In ceramics, a common use of soda ash is as a soluble deflocculant in ceramic slips and glazes. It works well in combination with sodium silicate to produce slips that do not gel too quickly and whose rheology can be adjusted for changes in the hardness of the water. Higher soda ash in proportion to sodium silicate will produce a slip that gives a softer cast (stays wet longer). The total soda ash and sodium silicate amount should be tuned to create a slip that will eventually gel if left to stand. This thixotropic behavior will prevent it from settling.
Sodium carbonate is the preferred deflocculant for thinning glaze slurries.
Soda ash is not normally used as a source of Na2O in glazes because it is soluble. It is used as a source of sodium in frits and glass. Its solubility makes it an ideal flux for Egyptian paste glazes.
Out Bound Links
In Bound Links
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Sodium Carbonate" descrip="The most common form of sodium carbonate" searchkey="Soda Ash, Calcined Soda, Anhydrous Sodium Carb, Na2CO3" loi="0.00" casnumber="3313-92-6">
<oxides>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="U" percent="58.700" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="CO2" name="Carbon Dioxide" percent="41.300" tolerance=""/>
</volatiles>
</material> | 
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