China Rectangular Shape High Purity 99-99.97% Ceramic Alumina Boat Crucible, Find details about China Alumina Boat Crucible, Gold Melting Ceramic Crucibles from Rectangular Shape High Purity 99-99.97% Ceramic Alumina Boat Crucible
High Alumina Ceramic Crucible Properties | |||
Unit | 95% | 99% | |
Density | g/cm3 | 3.6 | 3.8 |
Water absorption | % | <0.4 | <0.2 |
Firing temperature | °C | 1600 | 1800 |
Hardness | HRA | 70 | 80 |
Coefficient of linear expansion | *10-6/°C | 5.5 | 5.3 |
Dielectric constant | 9 | 10.5 | |
Volume resistivity | Ω·cm | - | 1013 |
Breakdown voltage | KV/mm | 14 | 15 |
Breaking strength | Mpa | 250 | 300 |