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A3 Stoneware Clay

Pr#3 A3, Buff Firing Stoneware Clay

OxideAnalysisFormula
CaO0.25%0.024
MgO0.65%0.085
K2O2.00%0.112
Na2O0.05%0.004
P2O50.02%0.001
TiO20.65%0.043
Al2O319.25%1.000
SiO266.00%5.819
Fe2O31.50%0.050
MnO0.01%0.001
LOI8.40
Oxide Weight478.90
Formula Weight522.81
If this formula is not unified correctly please contact us.

A high temperature plastic clean buff stoneware mined at Ravenscrag, Sask. Many of their low, middle and high temperature buff burning clay bodies are based on this material. It is balanced and almost usuable as a cone 10 stoneware straight out of the ground.

Analysis was done July 97.

357 Ba ppm
33 Sr pmm
24 Y ppm
14 Sc ppm
261 Zr ppm
2 Be ppm
82 V ppm


Ravenscrag Saskatchewan clays fired at cone 10R (top) and at cone 10R with glaze (bottom): A1, A2, A3, 3B, 3C, 3D. The bottom row has also shows solubles salts (SOLU test).

Plainsman A3 Native Stoneware fired test bars

Plainsman A3 Native Stoneware fired test bars

These are fired to cone 6, 8, 9 and 10 (top to bottom).

Physical properties for Plainsman A3

Physical properties for Plainsman A3

This chart shows lab measurements and calculated results for drying shrinkage, fired shrinkage, absorption, drying factor, sieve analysdis, LOI and water content of plastic material.

Out Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="A3 Stoneware Clay" descrip="Pr#3 A3, Buff Firing Stoneware Clay" searchkey="" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.250" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.650" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.000" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.050" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.020" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.650" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="19.250" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="66.000" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.500" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.010" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="8.400" tolerance=""/> </volatiles> </material>


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