China Vacuum Ceramic Insulation Alumina Crucible Boats for Muffle Furnace, Find details about China Crucible Boats, Crucible from Vacuum Ceramic Insulation Alumina Crucible Boats for Muffle Furnace
Feature
1. High purity: Al2O3>99%, good chemical corrosion resistance
2, good temperature resistance, long-term use at 1600ºC, short-term 1800ºC
3 . Corundum ceramic aluminum crucible is suitable for melting samples with anhydrous Na2CO3 and other weak alkaline substances as flux, but not suitable for melting samples with Na2O2, NaOH and other strong alkaline substances and acidic substances as flux (such as K2S2O7 and so on)Technical Parameters
Item | Unit | Corundum Material |
Al2O3 Content | % | 99.3 |
SiO2 Content | % | - |
Density | g /cm3 | 3.88 |
Water Absorption | % | 0.01 |
Compression Strength at Room Temperature
| MPa | 350 |
Leakage Rate 20ºC | Torr/ L. Sec | <10-11 |
Bending Strength | mm | ≤0.2mm 1600ºC |
Bonding at High Temperature | - | No Bonding 1600ºC |
Thermal Expansion Coefficient 20-1000ºC | mm. 10-6/ºC. m | 8.2 |
Thermal Conductivity | W/ m. k | 25 |
Electric Insulation Strength | KV/ mm | 20 |
DC Insulation Resistance 20ºC | Ohm/ cm | 1014 |
High Temperature Insulation Resistance | 1000ºC MΩ | ≥0.08 |
| 1300ºC MΩ | ≥0.02 |
Resistance To Thermal Shock | - | No Cracks 1550ºC for 4 times |
Max. Temperature | ºC | 1800 |