Share this page by mail Refractory Alumina Foam
Overview of refractory alumina foam
SIZAL-Cell® is a range of non-fibrous insulation products manufactured from alumina microspheres. Ultra-light, SIZAL-Cell® is designed for high-temperature applications up to 1,650 °C.
Ceramic foam board
The main component of the insulation is a microsphere made from alumina and silica. The higher the percentage of alumina, the higher the maximum operating temperature will be. An exclusive and innovative process allows the industrial production of this unique element. The internal structure of the cell is a honeycomb-like thread that ensures the mechanical quality of the insulation, whatever the temperature of use. A specific binder means the assembly is homogeneous - this particular construction is light and porous and, consequently, insulating and mechanically efficient.
Main properties
- Guaranteed use up to 1,650 °C (for the powder with 80.5 % alumina)
- Effective in all atmospheres, including reducing or oxidising atmospheres.
- Low thermal conductivity
- Low density, ultra-light insulation, easy to implement through machining
- Long life, no shrinkage or distortion, no decrease in quality and performance over time.
- Excellent resistance to thermal shock. Suitable for repeated and rapid hot and cold cycles, allowing production to increase without premature wear to the furnace lining
- Good resistance to abrasion and burner gas flows.
- Stabilised chemical composition (all plates undergo a heat treatment at their classification temperature) allowing a wide range of applications, with no pollution to the furnace atmosphere.
- Free from fibres and organic binders, and safe and environmentally friendly
- No carcinogenic classification in accordance with regulation EC No. 1907/2006 REACH.
Applications
- Insulation panels for industrial or laboratory installations
- Furnace linings (electric and gas)
- Furnace, burner or turbine components.
- Mechanical parts, part supports, and more.
- Repairs
- Support for heating resistors
Feel free to consult us; we can provide you with raw plates measuring 900 x 600 x 50 mm or machine your custom parts based on plans.
Technical Specifications
|
Référence |
Unités |
1260-380 |
1430-380 |
1540-380 |
1650-420 |
1705-420 |
|
Classification temperature |
°C |
1,260 |
1,430 |
1,540 |
1,650 |
1,705 |
|
Chemical composition (%) |
Al2O3 |
50.2 |
59.8 |
65.3 |
70.4 |
80.5 |
|
|
SiO2 |
46.4 |
38.1 |
32.1 |
28.5 |
17.8 |
|
|
Autre |
3.4 |
2.1 |
2.6 |
1.1 |
1.7 |
|
Mineral Phase |
|
Mullite + Corindon |
Mullite + Corindon |
Mullite + Corindon |
Mullite + Corindon |
Mullite + Corindon |
|
Continuous operating |
°C |
1,160 |
1,330 |
1,440 |
1,550 |
1,605 |
|
Short-duration |
°C |
1,210 |
1,380 |
1,490 |
1,600 |
1,650 |
|
Density |
kg/m3 |
380 |
380 |
380 |
420 |
420 |
|
Open porosity |
% |
88 |
87 |
86 |
86 |
87 |
|
Resistance to cold crushing |
MPa |
1.2 |
2.6 |
3.1 |
4.2 |
2.9 |
|
Resistance to cold bending |
MPa |
0.7 |
0.9 |
2 |
2.6 |
1.8 |
|
Permanent dimensional variation after 24 hours |
% |
±0.3 (1230°C) |
+/- 0.33 (1400°C) |
+/- 0.12 (1510°C) |
+/- 0.43 (1620°C) |
+/- 0.29 (1680°C) |
|
Thermal conductivity 200°C |
W/m.K |
0.13 |
0.15 |
0.2 |
0.18 |
0.17 |
|
400°C |
W/m.K |
0.14 |
0.17 |
0.21 |
0.21 |
0.19 |
|
600°C |
W/m.K |
0.19 |
0.19 |
0.22 |
0.24 |
0.21 |
|
800°C |
W/m.K |
0.2 |
0.22 |
0.24 |
0.26 |
0.25 |
|
1000°C |
W/m.K |
0.21 |
0.25 |
0.27 |
0.3 |
0.28 |
|
1200°C |
W/m.K |
/ |
0.28 |
0.3 |
0.33 |
0.31 |
|
Standard dimensions |
mm |
900 x 600 x 50 |
900 x 600 x 50 |
900 x 600 x 50 |
900 x 600 x 50 |
900 x 600 x 50 |