China Aluminum Oxide Al2O3 Ceramic Bolt, Nut and Screw, Find details about China 99.7% Al2O3 Screws, Ceramic Alumina Screws from Aluminum Oxide Al2O3 Ceramic Bolt, Nut and Screw
AL2O3 conent % | 60 | 75 | 80 | 85 | 92 | 95 | 99 | 99.7 |
Bulk density(g/cm3) | 3 | 3.1 | 3.3 | 3.4 | 3.6 | 3.7 | 3.81 | 3.85 |
Flexural Strength(MPa) | 205 | 280 | 215.7 | 230 | 312 | 304 | 340 | 370 |
Coefficient of linear expansion(×10-6/°C)(25-800°C) | 7.1 | 7.6 | 7.6 | 7.6 | 7.5 | 7.3 | 7.6 | 7.6 |
Thermal conductivity[w/(m.R)] | 16 | 17 | 17 | 17 | 18 | 20 | 34 | 35 |
Insulated strength(KV/mm) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Bulk density resistance(Ω.cm)20°C | >1014 | >1014 | >1014 | >1014 | >1014 | >1014 | >1014 | >1014 |
300°C | >1013 | >1013 | >1013 | >1013 | >1013 | >1012 | >1010 | >1010 |
Long term operating temperature (°C) | 1350 | 1000 | 1250 | 1290 | 1390 | 1480 | 1600 | 1700 |
Hardness | 7.5 | 7.5 | 7.5 | 7.5 | 8.5 | 8.8 | 9 | 9 |
Refractoriness | 1800 | 1700 | 1800 | 1850 | 1920 | 2000 | 2030 | 2040 |