Kentucky Stone
Alternate Names: Kentky Stn, Kentucky Stone Clay
Description: Kentucky Ball Clay
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.20% | 0.02 | |
| K2O | 1.20% | 0.06 | |
| MgO | 0.50% | 0.06 | |
| Na2O | 0.20% | 0.02 | |
| TiO2 | 1.30% | 0.08 | |
| Al2O3 | 20.00% | 1.00 | |
| SiO2 | 69.00% | 5.86 | |
| Fe2O3 | 1.80% | 0.06 | |
| LOI | 7.10% | n/a | |
| Oxide Weight | 480.42 | ||
| Formula Weight | 517.14 | ||
Notes
A coarse-grained, siliceous, illitic Ball Clay known for its high strength and plasticity. Applications include artware and ceramic tile. The high free silica content means that bodies with a high percentage of this material could cause certain glazes to shiver.
Physical Properties
===================
Water of Plasticity*: 26.6%
% Dry Shrinkage*: 5.4
Dry M.O.R. (50:50 ball clay:silica) psi:* 776
pH: 3.9
M.B.I. (meq/100g): 10.1
Specific Surface Area (sq metre/g): 20
Soluble sulfur SO4: Medium
P.C.E.: 24
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
(% finer than) 91% 81% 69% 55% 59% 37% 26%
Fired Properties
================
Cone 5 10
Total Shrinkage: 8.0% 10.1%
Absorption: 12.1% 5.1%
*This info is from a data sheet data Jan 2013
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 | 24 |
|---|
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