Spinks Blend Ball
Alternate Names: Spinks Blend #1, Spinks Blend Ball Clay
Description: Ball clay for casting slips
| Oxide | Analysis | Formula | Tolerance |
|---|---|---|---|
| CaO | 0.23% | 0.02 | |
| K2O | 0.67% | 0.03 | |
| MgO | 0.24% | 0.02 | |
| Na2O | 0.19% | 0.01 | |
| TiO2 | 1.50% | 0.07 | |
| Al2O3 | 26.80% | 1.00 | |
| P2O5 | 0.11% | - | |
| SiO2 | 58.70% | 3.72 | |
| Fe2O3 | 1.06% | 0.03 | |
| MnO | 0.02% | - | |
| LOI | 10.65% | n/a | |
| Oxide Weight | 340.71 | ||
| Formula Weight | 381.32 | ||
Notes
A coarse to fine-grained engineered blend designed as the complete ball clay fraction of casting slip. This clay exhibits excellent rheological, casting, and firming characteristics while promoting green strength. Ideally suited for all casting applications.
Relative Viscosity (1.2 Sp. Gr.):* 1.43
Casting Rate: (gms per 15 min/426 cm2):* 244
Cone 04 8 11
----
Fired Shrinkage:* 0.0% 1.6% 2.0%
Absorption:* 18.0% 15.3% 14.1%
M.O.R. psi:* 1091 2538 3994
Thermal Expansion, Cone 8: .624% at 700C
P.C.E.: 31
pH: 4.9
Oil Absorption: 32
Bulk Density, lbs per cubic foot: 34-40
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
91% 84% 75% 60% 48% 35% 15%
*MOR, dry shrinkage 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. |
| Materials |
KT #1-4 Ball Clay
|
Data
| Drying Shrinkage | 4.98% |
|---|---|
| Modulus of Rupture - Dry | 496 psi |
| Water of Plasticity | 18.8 |
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