Alumina ceramic (also called al2o3 or aluminum oxide ceramic) is widely applied in high temperature fields because of their good resistance to high temperature, it can withstand high temperature up to 1800℃, in addtion to its stable chemical properties, high mechanical strength and electrical insulation, alumina ceramic is widely used to make ceramic tubes for high temperature furnace, one end closed ceramic tubes or multi-hole insulating rods for thermocoulples, square ceramic tubes for corona electrode.
Alumina ceramic (also called al2o3 or aluminum oxide ceramic) is widely applied in high temperature fields because of their good resistance to high temperature, it can withstand high temperature up to 1800℃, in addtion to its stable chemical properties, high mechanical strength and electrical insulation, alumina ceramic is widely used to make ceramic tubes for high temperature furnace, one end closed ceramic tubes or multi-hole insulating rods for thermocoulples, square ceramic tubes for corona electrode. STA is able to produce ceramic tubes as long as 2000mm using the extrusion molding technology, custom size is available, please contact us when you have any demand.
Manufacturing Specification
Materail: 95% / 99% / 99.5% alumina ceramic (C795 / C799)
Available shape: round tubes, square tubes or custom shapes
Usage of tubes:
thermocouple protection tubes（one end closed, single hole）
ceramic furnace tube (open both ends, single hole)
ceramic insulting rods for thermocouples (open both ends, single hole/double holes/four holes/multi holes)
square ceramic tubes for corona electrode
Product Size:
Square alumina tube | |||||
Item NO. | Length * width (mm) | Thickness (mm) | Length Available | Purity Available | Remark |
STA201 | 15*15 | 2.5-3 | L≤2500mm | Al2O3=99% | R angle or Right angle |
STA202 | 16*12 | 2.5-3 | R angle or Right angle | ||
STA203 | 16*15.25 | 2.5-3 | Single grooved | ||
Features
High mechanical strength and hardness
Extreme wear resistance
Good electrical insulation
Low dielectric constant and dielectric loss
Excellent corrosion resistance
Good resistance to high temperature
Material Data Sheet
Technical Parameter Of Alumina Ceramics | |||||
Item | Test condition | Unit&Symbol | 95% | 99% | 99.7% |
The Main | Al2O3 | Al2O3 | Al2O3 | ||
Bulk Density | g/cm³ | >3.6 | 3.89 | 3.96 | |
Maximum Use Temperature | ºC | 1450 | 1600 | 1650 | |
Water Absorption | % | 0 | 0 | 0 | |
ROHS Hardness | ≥85 | ≥ 89 | ≥89 | ||
Flexural Strength | 20 ºC | Mpa(psi*10³) | 358(52) | 550 | 550 |
Compressive Strength | 20 ºC | Mpa(psi*10³) | 2068(300) | 2600(377) | 2600(377) |
Fracture Toughness | K(lc) | Mpa m 1/2 | 4-5 | 5.6 | 6 |
Coefficient Of Thermal Expansion | 25-1000 ºC | 1*10 -6 /ºC | 7.6 | 7.9 | 8.2 |
Coefficient Of Thermal Conductivity | 20 ºC | W/mk | 16 | 30.0 | 30.4 |
Thermal Shock Resistance | ΔTc | ºC | 250 | 200 | 200 |
Dielectricity Constant | 1MHz.25 ºC | 9 | 9.7 | 9.7 | |
Dielectricity Strength | ac-kV/mm(ac V/mil) | 8.3(210) | 8.7(220) | 8.7(220) | |
Volumn Resistivity | 100 ºC | ohm-cm | >10 13 | >10 14 | >10 14 |
Alumina ceramic (also called al2o3 or aluminum oxide ceramic) is widely applied in high temperature fields because of their good resistance to high temperature, it can withstand high temperature up to 1800℃, in addtion to its stable chemical properties, high mechanical strength and electrical insulation, alumina ceramic is widely used to make ceramic tubes for high temperature furnace, one end closed ceramic tubes or multi-hole insulating rods for thermocoulples, square ceramic tubes for corona electrode. STA is able to produce ceramic tubes as long as 2000mm using the extrusion molding technology, custom size is available, please contact us when you have any demand.
Manufacturing Specification
Materail: 95% / 99% / 99.5% alumina ceramic (C795 / C799)
Available shape: round tubes, square tubes or custom shapes
Usage of tubes:
thermocouple protection tubes（one end closed, single hole）
ceramic furnace tube (open both ends, single hole)
ceramic insulting rods for thermocouples (open both ends, single hole/double holes/four holes/multi holes)
square ceramic tubes for corona electrode
Product Size:
Square alumina tube | |||||
Item NO. | Length * width (mm) | Thickness (mm) | Length Available | Purity Available | Remark |
STA201 | 15*15 | 2.5-3 | L≤2500mm | Al2O3=99% | R angle or Right angle |
STA202 | 16*12 | 2.5-3 | R angle or Right angle | ||
STA203 | 16*15.25 | 2.5-3 | Single grooved | ||
Features
High mechanical strength and hardness
Extreme wear resistance
Good electrical insulation
Low dielectric constant and dielectric loss
Excellent corrosion resistance
Good resistance to high temperature
Material Data Sheet
Technical Parameter Of Alumina Ceramics | |||||
Item | Test condition | Unit&Symbol | 95% | 99% | 99.7% |
The Main | Al2O3 | Al2O3 | Al2O3 | ||
Bulk Density | g/cm³ | >3.6 | 3.89 | 3.96 | |
Maximum Use Temperature | ºC | 1450 | 1600 | 1650 | |
Water Absorption | % | 0 | 0 | 0 | |
ROHS Hardness | ≥85 | ≥ 89 | ≥89 | ||
Flexural Strength | 20 ºC | Mpa(psi*10³) | 358(52) | 550 | 550 |
Compressive Strength | 20 ºC | Mpa(psi*10³) | 2068(300) | 2600(377) | 2600(377) |
Fracture Toughness | K(lc) | Mpa m 1/2 | 4-5 | 5.6 | 6 |
Coefficient Of Thermal Expansion | 25-1000 ºC | 1*10 -6 /ºC | 7.6 | 7.9 | 8.2 |
Coefficient Of Thermal Conductivity | 20 ºC | W/mk | 16 | 30.0 | 30.4 |
Thermal Shock Resistance | ΔTc | ºC | 250 | 200 | 200 |
Dielectricity Constant | 1MHz.25 ºC | 9 | 9.7 | 9.7 | |
Dielectricity Strength | ac-kV/mm(ac V/mil) | 8.3(210) | 8.7(220) | 8.7(220) | |
Volumn Resistivity | 100 ºC | ohm-cm | >10 13 | >10 14 | >10 14 |
