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Rescor® Castable Ceramics are available in 6 refractory compositions offering the ultimate selection of ceramics to the materials engineer. Now, an unlimited number of high temperature applications, requiring custom ceramic shapes, can be easily solved. Just mix the ceramic powders with their liquid activators and pour into any non-absorbent moulds.
Rescor® Castable Ceramics harden overnight to produce highly detailed ceramics, usable to 2200°C. They offer excellent resistance to high temperature, thermal shock, molten metals, oxidizing and reducing atmospheres, erosion, most acids and alkalise.
Rescor® 740 liquid foam forms lightweight, high strength, machinable, thermally and electrically insulating parts usable to 1260°C. Just mix the ceramic powder with its liquid activator and pour into non- absorbent moulds. Hardens overnight to produce high strength, insulating prototypes and parts.
Can be used up to 1260°C with high temperature structural stability and excellent resistance to oxidizing and reducing atmospheres. Resistant to molten non-ferrous metals, steam most chemicals and solvents.
Suitable for near net shape processing which involves casting a ceramic blank into a shape that requires minimal or no machining to final shapes. Post curing Rescor® 740 improves its machinability.
Technical data: Rescor 740 from Cotronics
|
Composition |
Units |
Rescor® 740 |
|
Base |
Al2O3-SiO2 |
|
|
Grain size (min-max) |
µm |
≤45 - 300 |
|
Density |
g/cm3 |
0.64 |
|
Max Temperature |
°C |
1260 |
|
Shrinkage (after curing at room temperature) |
% |
0.5 |
|
Shrinkage (540°C) |
% |
1.0 |
|
Compressive Strength |
N/cm2 |
1030 |
|
Breaking Strength (900°C) |
N/cm2 |
620 |
|
Thermal Conductivity |
W/m.K |
0.14 |
|
Expansibility |
10-6.K-1 |
8.1 |
|
Breakdown |
kV/mm |
3.9 |
|
Mix (weight) Base |
100 |
|
|
Catalyser |
64 |
Rescor 740 - Moldable Ceramic, Foam Insulation
FAQs that can help you in this category
A castable ceramic cement has low viscosity, enabling casting or pouring in moulds of complex shapes. It is formulated to limit segregation, to ensure effective dimensional reproducibility, and to produce a ceramic part. Potting cement is used to encapsulate or fix components in an assembly.
At Final Advanced Materials castable cements are optimised for the manufacture of parts (final density 2.0–3.0 g/cm³), while potting cements are designed to prioritise adhesion in assemblies (housings, resistor overmoulding, etc.).
For foundry moulds Final Advanced Materials produces alumina, silicon carbide, silica or zirconia-based cements, which are suited for temperatures between 1,200 and 2,200°C. Zirconia formulations are particularly suitable if a very high resistance to chemicals is required. Alumina cements have better mechanical resistance (>40 MPa in compression). SiC cement is a very good option for molten metal casting, launders, crucibles or nozzles. The choice depends on the cast metal and the temperature (e.g.: aluminium ~700°C, steel >1,500°C) and the thermal shock resistance.
The ceramic casting cements produced by Final Advanced Materials have standard compression resistances of 10 to 40 MPa, depending on the formulation and porosity. Thermal shrinkage is generally low, reducing internal stresses and cracking. Dense alumina-based formulations offer the best mechanical performance, while more insulating systems have a lower resistance, but reduced thermal conductivity (<0.15 W/m·K).