All crucibles, alumina, magnesia and zirconia to name a few, are manufactured in Capital's own modern purpose-built facility in the Czech Republic where we press, cast and fire various materials into crucibles.
Capital Refractories is able to supply a full range of isostatically pressed crucibles from 2 kg capacity to 75 kg, in different grades and qualities. We use a state-of-the-art semi-automated cold isostatic press. Cold isostatic pressing applies pressure to the workpiece in all directions producing products of uniform density.
The advantages of Isostatically Pressed Crucibles are:
Crucibles are produced by vibration casting (vibrocast) when the required size or shape is uneconomical or impractical by the isopressing production method.
Capital Refractories can offer a range of vibration cast crucibles, including T-Pot Ladles:
Complex shapes, e.g. internal pouring siphon
To complement our range of crucibles we also offer numerous ancillary products and materials used within the investment and related foundry industries.
|Zircon||ZN66I||Used for non-ferrous and precious metals|
|Zirconia||.....||Used in the vacuum melting of superalloys and precious metals|
|.....||ZC95I||High thermal shock resistance for noble metals|
|.....||ZC96I||Fine grained structure for noble metals|
|Quality||Al2O3||SiO2||CaO||Fe2O3||ZrO2 + HfO2|
|Quality||Bulk Density / g cm-3||Apparent Porosity / %||Thermal Expansion / x10-6 K-1||Thermal Conductivity / W m-1 K-1||Maximum Service Temperature / °C|