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|
Properties |
Value |
|
Density/（g/cm3） |
2.15 |
|
Coefficient of thermal expansion/×10-7℃-1 |
5.4 |
|
Young's modulus/×10-4MPa |
7.4 |
|
Electrical resistivity（20℃）/(Ω/cm) |
2×1015 |
|
Electrical resistivity（800℃）/(×105Ω/cm) |
2×105 |
|
Thermal inertia |
Reaching equilibrium temperature 10~30s |
|
Breakdown voltage（400℃）/kV |
3.25 |
|
Permeability（100℃） |
Non permeable to aqueous and acidic solutions |
|
Voltage withstand（20℃）/（kV/mm） |
10 |
|
Voltage withstand（500℃）/（kV/mm） |
2~3 |
|
Thermal radiation coefficient ε |
0.92 |
|
Electricity to radiation conversion rate η/% |
60~65 |
|
Purity（SiO2）/% |
99.8~99.9 |
|
Far infrared transmittance |
Good |
