R-OM #4 Ball Clay

Description: Tennessee Ball Clay

Oxide	Analysis	Formula
CaO	0.40%	0.03
K2O	1.10%	0.04
MgO	0.40%	0.04
Na2O	0.20%	0.01
TiO2	1.20%	0.06
Al2O3	27.20%	1.00
SiO2	55.90%	3.49
Fe2O3	1.10%	0.03
LOI	12.50%	n/a
Oxide Weight		328.13
Formula Weight		375.00

Notes

An intermeadiate-grained ball clay with good plasticity and strength. Can be used in casting or plastic formed bodies. Applications include dinnerware and artware.

Physical Properties
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Water of Plasticity*: 37.0%
% Dry Shrinkage*: 6.5
Dry M.O.R., psi:* 825
pH: 4.4
C.E.C., meq/100g: 11.0
Specific Surface Area, sq metre/g: 24.4
Soluble sulfur+: Low

P.C.E.: 32

Particle Size, Microns: 20 10 5 2 1 0.5 0.2
(% finer than) 99% 97% 93% 81% 72% 56% 35%

Fired Properties
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Cone 5 10
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Total Shrinkage: 13.0% 14.5%
Absorption: 10.0% 1.0%

Shipped from Mayfield, KY

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*Extruded, 50% ball clay, 50% flint
+Low-trace to 150, Med-150-400, High-450+
**50% Clay, 50% Nepheline Syenite

Related Information

Links

Typecodes	Ball Clay Ball clays are abundant and very plastic and are used in all types of plastic forming bodies. They are not as white-burning or refractory as kaolins but lower in iron and fluxes than bentonites.

By Tony Hansen
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