| Material Type | CT-23 |
| Classification Temperature ( ºC ) | 1250 ± 30 |
| Density (kg/m3) | 500 ± 50 |
| Cold Crushing Strength (MPa) | 1.1 ± 0.2 |
| Cold Modulus Rupture (MPa) | 0.8 ± 0.2 |
| Permanent Linear Change (1230 ºC× 4h) | 0.4 ± 0.1% |
| Linear Thermal Expansion | 0.46 ± 0.05% |
| Thermal Conductivity ºC | |
| Mean Temperature, ºC | W/ ( m · k ) |
| 400 | 0.16 |
| 600 | 0.19 |
| 800 | 0.22 |
| 1000 | 0.25 |
| Chemical Analysis | % |
| Al2O3 | 36.3 ± 2 |
| Fe2O3 | 0.98 ± 0.1 |
| SiO2 | 60 ± 2 |
| TiO2 | 0.7 ± 0.01 |
| CaO | 0.55 ± 0.01 |
| MgO | 0.16 ± 0.01 |
| K2O | 0.85 ± 0.01 |
| Na2O | 0.3 ± 0.01 |
| Dimensional Tolerances (mm) | ± 0.5 |