
| Max service temperature | 1200 ℃ |
| Bulk density | 1000 kgs/m³ |
| Compress strength | >8 Mpa |
| Rupture strength | >2.5 Mpa |
| Reversible thermal expansion | 11x10-6 |
| Linear reheat shrinkage | <1% |
| SiO2 | 48-50 % |
| Al2O3 | 12-16 % |
| Fe2O3 | 4-6 % |
| TiO2 | 1-2 % |
| MgO | 12-16 % |
| CaO | 2-4 % |
| K2O | 5-8 % |
| Na2O | 0.2-1% |






