Typical application
Mainly used for glass contact and superstructure application for insulation glass furnaces.
LEAF 50 is made of grains from a unique manufacturing process, the very specific chemical and crystallographic structure provides high corrosion resistance with several others benefits such as :
- smooth corrosion profile,
- lower joint corrosion thru better joint closure after heat-up,
- good electrical resistivity,
LEAF 50 is the preferred material for hot overcoating applications.
Chemical and physical properties
Microstructure
Image
Typical chemical properties
Typical crystallographic analysis
Main phase:
- Cr2O3-Al2O3 solid solution
- monoclinic zirconia
Physical characteristics
| Description | International standards | British standards |
|---|---|---|
| Cold crushing strength | 75Mpa | 10,878psi |
| Refractoriness under load 2 105Pa, 0.5% at | 1,477°C | 2,691°F |
| Coefficient of thermal expansion | 8.2 10-6K-1 | 4.5 10-6°F-1 |
| Thermal conductivity at 1,000°C | 2.6W.m-1.K-1 | 18BTU in hr-1ft-2°F-1 |
| Porosity | 13.7% | 13.7% |
| Typical bulk density | 3.5g/cm3 | 218pcf |
Storage
The bonded 50% chrome-alumina, LEAF 50 solution must be stored in a dry environment protected from weather conditions.