It has a good warm-keeping temperature and balancing heat.
Specifications（mm）：1600×950×（10～100）
Properties
| Bulk density | Heat conductivity |
Cracking strength | Carbon content | Hydrogen content | Nitrogen content | Ash content |
| 0.15～0.22g/cm3 | 0.12w/m.k(500℃) | 0.12MPa | >92.0% | 1.2% | 1.5% | 0.75% |