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.
|Alumina||.....||General purpose crucible with good resistance to acidic and basic slags. Used for wide range of alloys and stainless steels|
|.....||AL97I||Superior erosion resistance|
|.....||AL88I||Improved thermal shock resistance|
|......||AL97C||High resistance to slags.|
|.....||90C||General purpose with excellent strength and thermal shock resistance.|
|.....||97C||Good resistance to slags|
|.....||98C||Very low silica - preferred for vacuum melting.|
|Quality||Bulk Density (g / cm³)||Apparent Porosity (%)||Thermal Expansion (x10⁻⁶ / K)||Thermal Conductivity (W / m K)||Maximum Service Temperature (°C)|