Hays Special Clay
Alternate Names: Hays Special Ball Clay
Description: Ball Clay
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.20% | 0.01 | |
| K2O | 0.98% | 0.04 | |
| MgO | 0.34% | 0.03 | |
| Na2O | 0.21% | 0.01 | |
| TiO2 | 1.37% | 0.07 | |
| Al2O3 | 25.30% | 1.00 | |
| P2O5 | 0.07% | - | |
| SiO2 | 60.00% | 4.02 | |
| Fe2O3 | 1.30% | 0.03 | |
| MnO | 0.01% | - | |
| LOI | 10.15% | n/a | |
| SO3 | 0.05% | n/a | |
| Oxide Weight | 361.96 | ||
| Formula Weight | 403.07 | ||
Notes
Relative Viscosity (1.2 Sp. Gr.):* 1.29
Casting Rate: (gms per 15 min/426 cm2):* 208
Water of Plasticity:* 20.6
% Dry Shrinkage:* 4.75
Dry M.O.R., psi:* 447
Cone 04 8 11
----
Fired Shrinkage:* 0.0% 1.5% 2.3%
Absorption:* 22.1% 15.6% 10.6%
M.O.R. psi:* 1930 3420 5349
Thermal Expansion, Cone 8: .475% at 700C
P.C.E.: 31
pH: 5.4
Oil Absorption: 36
Bulk Density, lbs per cubic foot: 35-40
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
95% 90% 81% 60% 42% 25% 5%
*Specimens: De-aired, extruded, 50% ball clay, 50% flint
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. |
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