Coppen Light Clay

Alternate Names: Coppen Light Ball Clay

Description: Refractory ball clay

Oxide	Analysis	Formula
CaO	0.12%	0.01
K2O	0.64%	0.03
MgO	0.22%	0.02
Na2O	0.08%	-
TiO2	1.57%	0.07
Al2O3	26.95%	1.00
P2O5	0.13%	-
SiO2	58.33%	3.67
Fe2O3	1.14%	0.03
MnO	0.12%	0.01
LOI	10.52%	n/a
SO3	0.04%	n/a
Oxide Weight		337.98
Formula Weight		377.89

Notes

The manufacturer states: A fine-grained engineered blend offering high Al₂O₃ percentage and excellent PCE characteristics. Excellent fired color and plasticity make this product ideally suited for refractory and dinnerware applications

Relative Viscosity (1.2 Sp. Gr.):* 1.49
Casting Rate: (gms per 15 min/426 cm2):* 203
Water of Plasticity:* 19.5
% Dry Shrinkage:* 5.33
Dry M.O.R., psi:* 503

Cone 04 8 11
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Fired Shrinkage:* 0.3% 1.8% 1.7%
Absorption:* 17.1% 14.4% 14.1%
M.O.R. psi:* 1427 4156 4588

Thermal Expansion, Cone 8: 0.398% at 700C
P.C.E.: 31
pH: 4.6
Oil Absorption: 36
Bulk Density, lbs per cubic foot: 33-38
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
97% 93% 85% 70% 55% 37% 13%

*Specimens: De-aired, extruded, 50% ball clay, 50% flint

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Materials	Ball Clay A fine particled highly plastic secondary clay used mainly to impart plasticity to clay and porcelain bodies and to suspend glaze, slips and engobe slurries.
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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