Black Charm Clay
Alternate Names: Ball Charm Ball Clay
Description: Ball Clay
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.33% | 0.03 | |
| K2O | 1.34% | 0.06 | |
| MgO | 0.21% | 0.02 | |
| Na2O | 0.32% | 0.02 | |
| TiO2 | 0.20% | 0.01 | |
| Al2O3 | 22.66% | 1.00 | |
| P2O5 | 0.04% | - | |
| SiO2 | 62.96% | 4.72 | |
| Fe2O3 | 1.53% | 0.04 | |
| MnO | 0.05% | - | |
| LOI | 10.52% | n/a | |
| SO3 | 0.11% | n/a | |
| Oxide Weight | 403.50 | ||
| Formula Weight | 451.49 | ||
Notes
A coarse-grained engineered blend offering a high degree of moisture retention, plasticity, and naturally occurring organics. Ideally suited for a variety of bonding applications.
Relative Viscosity (1.2 Sp. Gr.):* 1.23
Casting Rate: (gms per 15 min/426 cm2):* 165
Water of Plasticity:* 26.4
% Dry Shrinkage:* 5.55
Dry M.O.R., psi:* 496
Cone 04 8 11
----
Fired Shrinkage:* 0.4% 1.5% 2.5%
Absorption:* 21.0% 18.3% 14.8%
M.O.R. psi:* 620 1830 4050
Thermal Expansion, Cone 8: .495% at 700C
P.C.E.: 29
pH: 4.6
Oil Absorption: 32
Bulk Density, lbs per cubic foot: 35-39
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
92% 81% 65% 45% 31% 16% 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. |
Data
| Pyrometric Cone Equivalent | 29 |
|---|
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