Ceramic tube
High temperature resistance, chemical attack resistance, high dielectric strength , thermal shock resistance, wear
Ceramic tube is widely used in the industries of high temperature endurable parts, electric insulators,fire resistance materials
Ceramic tube is of good chemical resistance,hardness,high temperature resistance,insulation,and widely used in the industries of machine parts,high-temperature endurable parts,electric or electric equipment insulators,fire-resistance materials.
Idex | Unit | 95% alumina | 99% alumina | steatite ware |
composition | AL2O3 | AL2O3≥95% | AL2O3≥99% | MgO SiO2 |
density | g/cm3 | 3.6 | 3.9 | 2.8 |
water absorption | % | 0 | 0 | 0 |
firing temperature | °C | 1,680 | 1,700 | 1,350 |
hardness | HV | 1,500 | 1,700 | 800 |
flexural strength(4pt) | kgf/cm2 | 3,000 | 3,500 | 900 |
composition strength | kgf/cm2 | 25,000 | 30,000 | 4,000 |
maximum use temperature | °C | 1,450 | 1,500 | 1,100 |
thermal expansion 0-1000°C | /°C | 8.0*10-6 | 8.0*10-6 | 6.0*10-6 |
thermal shock resistance | T(°C) | 220 | 200 | 200 |
dielectric strength | KV/mm | 18 | 18 | 10 |
dielectric constant(100Mhz) | (E) | 9.5 | 10 | 5.8 |
dielectric tangent | (tg s) | 0.4*10-3 | 0.4*10-3 | 0.4*10-3 |
Surface finish:
a) Normal polish Ra 0.9-1.0μm
b) Fine polish Ra 0.4-0.6μm .
c) Diamond polish Ra 0.2μm
Tolerance: DIN ISO 2768-1 and DIN 40680 m
