| Density(Kg/m3) | 300-600 | |
| Strength to resist bending(MPa,25C) | 0.72 | |
| Linear shrinkage rate % (1600Cx8hrs) | 0.13(1.7)* | |
| Expansion rate at %(600C) | 0.28 | |
| Average modulus of linear expansion (x10-6/K) | 1.77 | |
| Thermal conductivity rate GHP[W/(mK)] | 400C | 0.147 |
| 600C | 0.186 | |
| 800C | 0.236 | |
| 1000C | 0.296 | |
| Chemical composition | AL2O3:87% SiO2:13% |
| Type | JK-1000 | JK -1260 | JK -1400 | JK -1600 | JK -1700 | JK-1800 |
| Classification temperature | 1000 | 1260 | 1400 | 1600 | 1700 | 1800 |
| density (Kg/m3) | 200-600 | 200-600 | 200-600 | 200-600 | 350-600 | 350-600 |
| Line change(CX24hS) | 1.3 (900C) | 1.1 (1100C) | 1.6 (1200C) | <2.0 (1400C) | <2.0 (1500C) | <2.0 (1600C) |
| compressive strength | 0.5 | 0.5 | 0.5 | 0.3 | 0.3 | 0.3 |