Technology Ceramics :
| Water/Powder Ratio by Weight : | 14/100 |
| Working Time : | 5-5½ minutes |
| Setting Time : | 10 minutes max. |
| Water/Powder Ratio by Weight : | 16-18/100 |
| Working Time : | 5-6 minutes |
| Setting Time : | 6½-10 minutes |
| Binder/Powder Ratio : | 32/100 by weight (or 29 ml of binder per 100 g of powder) |
| Pouring Time : | 12-15 minutes |
| Setting Time : | 50-60 minutes |
| 2-hour Green Strength : | 120 psi |
| 1600°F (871°C) Fired Strength : | 400 psi |
| Binder Density : | 1.11 g/ml |
| Volume of Mix : | 18.7 cubic inches per 1 lb. of powder (or 675 cubic centimeters per 1 kg of powder) |
We have a standard range of pouring cups (listed in attachment), but can manufacture to bespoke requirements.
Ceramic Pouring Cup specifications:
| Chemical Analysis (Wt.%) | |||
| Al203 | Sio2 | Fe2O3 | |
| Fused Silica FS 76J | 21.9 | 76.4 | 0.60 |
The advantages of vibro-cast crucibles include:
# Melt capacities of up to 1 tonne.
# Complex shapes, e.g. internal pouring siphon.
| Chemical Analysis (Wt.%) | ||||||
AL2O3 | SiO2 | Fe2O3 | CaO + MgO | K2O + Na2O | Cr2O3 | |
Alumina AL97C | 96.6 | 2.5 | <0.1 | 0.1 | 0.2 | |
Alumina AL92C | 92.1 | 7.2 | <0.1 | 0.1 | 0.2 | |
Chrome Alumina CA93C | 93.0 | 2.8 | <0.1 | 0.1 | 0.2 | 3.5 |
Sillimanite SL70C | 70.6 | 27.1 | 0.7 | 0.2 | 0.2 | |
Sillimanite SL63C | 63.8 | 34.2 | 0.5 | 0.3 | 1.1 | |
Bulk Density | Apperent Porosity | Thermal Expansion | Thermal Conductivity | Max. Service Temp / *C | |
Alumina AL97C | 3.1 | 19.6 | 8.0 | 4.06 | 1800 |
Alumina AL92C | 2.95 | 24.8 | 8.0 | 4.2 | 1750 |
Chrome Alumina CA93C | 3.14 | 19.3 | 8.2 | 3.0 | 1750 |
Sillimanite SL70C | .45 | 19.5 | 4.5 | 1.6 | 1700 |
Sillimanite SL63C | 2.32 | 22.0 | 5.0 | 1.4 | 1650 |