K&T Special
Alternate Names: Kentucky Special Ball Clay
Description: Kentucky Ball Clay
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.30% | 0.02 | |
| K2O | 0.90% | 0.04 | |
| MgO | 0.50% | 0.05 | |
| Na2O | 0.20% | 0.01 | |
| TiO2 | 1.50% | 0.07 | |
| Al2O3 | 27.40% | 1.00 | |
| SiO2 | 53.30% | 3.30 | |
| Fe2O3 | 1.10% | 0.03 | |
| LOI | 14.80% | n/a | |
| Oxide Weight | 317.17 | ||
| Formula Weight | 372.26 | ||
Notes
Water of Plasticity: 40.0%
% Dry Shrinkage: 7.5
Dry M.O.R., psi:* 890
pH: 4.3
C.E.C., meq/100g: 11.5
Soluble sulfur:** Med-High
Cone 5 10
----
Total Shrinkage: 15.5% 17.5%
Absorption: 14.0% 3.5%
P.C.E.: 32
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
97% 95% 90% 80% 70% 56% 31%
*Modulus of Rupture Specimens: De-aired, extruded, 50% ball clay, 50% flint
**Low-trace to 150, Med-150-400, High-450+
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 | 32 |
|---|
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