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OM #4 Ball Clay

Tennessee Ball Clay

Alternate Names: OM4 Ball Clay, OM4, OM#4, OM 4, Old Mine #4, OM-4 Ball Clay

OxideAnalysisFormula
CaO0.20%0.014
MgO0.50%0.048
K2O1.10%0.045
Na2O0.20%0.013
TiO22.00%0.097
Al2O326.30%1.000
SiO259.70%3.853
Fe2O31.30%0.032
LOI9.30
Oxide Weight354.09
Formula Weight390.40
If this formula is not unified correctly please contact us.
PCE - Pyrometric Cone Equivalent 31

Old Mine #4, Mayfield, KY.
A fine-grained ball clay with excellent plasticity and strength. Old Mine #4 is an "industry standard" based on its popularity in both casting and plastic formed bodies. It is also widely used as a suspension aid in glazes.

OM#4 ball clay is variable in nature and tends to be more vitreous than some of the more refractory ball clays that are available. It has some soluble salts which can give a brown coloration to the surface, so barium carbonate may be needed to precipitate these.

Physical Properties
===================
Water of Plasticity: 32.8%
% Dry Shrinkage: 6.2
Dry M.O.R. (50:50 ball clay:silica, psi): 610
pH: 4.0
M.B.I. (meq/100g): 9.2
Specific Surface Area (sq-metre/g): 23.1
Soluble sulphur SO4: Low

P.C.E.: 32

Particle Size, Microns: 20 10 5 2 1 0.5
(% finer than) 96% 91% 83% 68% 57% 46%

Fired Properties
================
Cone 5 10
Total Shrinkage: 11.3% 13.6%
Absorption: 11.1% 4.2%

Shipped from Mayfield, KY

*This info is from a data sheet from Jan 2013


OM4 Ball clay fired from cone 10R (top), 10 down to 4 (downward)

OM4 Ball clay fired from cone 10R (top), 10 down to 4 (downward)

Ball clays are normally refractory, none of these are vitrified to any extent. The cone 10R bar is yellow because it is stained by the soluble salts present in the material.

Out Bound Links

In Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="OM #4 Ball Clay" descrip="Tennessee Ball Clay" searchkey="OM4 Ball Clay, OM4, OM#4, OM 4, Old Mine #4, OM-4 Ball Clay" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.200" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.500" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="1.100" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.200" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="2.000" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="26.300" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="59.700" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.300" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="9.300" tolerance=""/> </volatiles> </material>


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