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| Item | unit | |
| use temperature | oC | 1380 |
| density | g/cm3 | >3.03 |
| thermal conductivity | w/m.k | 43(1200oc) |
| breath rate | % | <0.1 |
| coefficient of thermal expansion | K-1 * 10-6 | 4.5 |
| Elasticity | Gpa | 335(20oc) |
| Gpa | 310(1200oc) | |
| Bending strength | Mpa | 250(20oc) |
| Mpa | 285(1200oc) | |
| Mohs hardness | 13 | |
| Acid degree | stubborn |
Hot 2011 silicon nitride protective tube