Spinks HC#5 Clay
Alternate Names: Spinks #5, Spinks No. 5, Spinks HC5
Description: White burning, low carbon for plastic bodies
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.27% | 0.02 | |
| K2O | 0.31% | 0.01 | |
| MgO | 0.21% | 0.02 | |
| Na2O | 0.10% | 0.01 | |
| TiO2 | 1.59% | 0.07 | |
| Al2O3 | 27.65% | 1.00 | |
| P2O5 | 0.14% | - | |
| SiO2 | 56.25% | 3.45 | |
| Fe2O3 | 1.13% | 0.03 | |
| MnO | 0.02% | - | |
| LOI | 12.40% | n/a | |
| SO3 | 0.03% | n/a | |
| Oxide Weight | 323.41 | ||
| Formula Weight | 369.32 | ||
Notes
This ball clay is very white firing and is quite similar to the popular Old Hickory #5 material, infact it was developed to emulate it. It is thus also a good choice to suspend glazes. Amounts of only 15% are needed in a recipe having no other clay materials, however beware not to use too much or the glaze will gel.
Relative Viscosity (1.2 Sp. Gr.):* 1.29
Casting Rate: (gms per 15 min/426 cm2):* 242
Water of Plasticity:* 21.2
% Dry Shrinkage:* 5.14
Dry M.O.R., psi:* 230
Cone 04 8 11
----
Fired Shrinkage:* 0.1% 1.5% 2.1%
Absorption:* 16.9% 14.0% 12.6%
M.O.R. psi:* 1758 2830 5863
Thermal Expansion, Cone 8: .335% at 700C
P.C.E.: 32+
pH: 4.2
Oil Absorption: 32
Bulk Density, lbs per cubic foot: 35-40
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
93% 82% 65% 44% 30% 18% 6%
*Specimens: De-aired, extruded, 50% ball clay, 50% flint
Related Information
Links
| Materials |
No. 5 Ball Clay
|
| 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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