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Coppen Light Clay

Alternate Names: Coppen Light Ball Clay

Oxide Analysis Formula
CaO 0.12% 0.01
K2O 0.64% 0.03
MgO 0.22% 0.02
Na2O 0.08% 0.00
TiO2 1.57% 0.07
Al2O3 26.95% 1.00
P2O5 0.13% 0.00
SiO2 58.33% 3.67
Fe2O3 1.14% 0.03
MnO 0.12% 0.01
LOI10.52%
SO30.04%
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
----
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

Related Information

Links

Materials Ball Clay
Suppliers H. C. Spinks Clay Company Inc.
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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