Typical application
BP MULLITE is dedicated to superstructure application. Due to its high creep resistance at very high temperature, BP MULLITE is used in crowns and feeder covers for reinforcement and textile fiber glass furnaces as well as for vitroceramic, borosilicate and sodium silicate glass furnaces.
For very heavy insulation crown application, refer to BP MULLITE REC.
If mortar is required, use BP MULLITE MORTAR.
Chemical and physical properties
Microstructure
Image
Typical chemical composition
Typical crystallographic analysis
Main phase: mullite
Secondary phase: corundum + silicate
Physical characteristics
| Description | International standards | British standards |
|---|---|---|
| Refractoriness under load 0.2Mpa at 0.5% | 1,700°C | 3,092°F |
| Cold crushing strength | 100Mpa | 14,504si |
| Coefficient of thermal expansion | 5.4 10-6K-1 | 3 10-6°F-1 |
| Thermal conductivity at 1,000°C | 2 W.m-1.K-1 | 13.8 BTU in hr-1ft-2°F-1 |
| Creeping at 1,700°C under load 0.4Mpa 0-100h | 2% | 2% |
| Porosity | 15% | 15% |
| Typical bulk density | 2.7g/cm3 | 168.5pcf |
Storage
The sintered fused mullite 75% alumina, BP MULLITE solution must be stored in a dry environment protected from weather conditions.