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Indiana Red Clay
| Oxide | Analysis | Formula | |
|---|---|---|---|
| SiO2 | 65.00% | 6.45 | |
| Al2O3 | 17.10% | 1.00 | |
| TiO2 | 1.20% | 0.09 | |
| Fe2O3 | 6.70% | 0.25 | |
| CaO | 0.30% | 0.03 | |
| MgO | 1.10% | 0.16 | |
| K2O | 2.80% | 0.18 | |
| Na2O | 0.60% | 0.06 | |
| LOI | 0.20% | n/a | |
| Oxide Weight | 565.47 | ||
| Formula Weight | 597.75 | ||
Notes
A smooth plastic red burning earthenware clay with excellent drying properties. It fires very vitreous by cone 02.
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Clay Other
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically. |
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Data
| Firing Shrinkage | Cone 06: 1% Cone 02: 7% Cone 2: 8% |
|---|---|
| Modulus of Rupture - Dry | 300-400 (Dry) |
| Pyrometric Cone Equivalent | 19 |
| Surface Area (m2/gm) | 13 |
| Water absorption | Cone 06: 15% Cone 02: 2% Cone 2: 0% |
| pH for dry powder | 9.0 @10% solids |
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