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product name:Industrial alumina ceramic tube
Aluminum oxide ceramics are high-purity aluminum oxide products
with excellent physical properties and chemical stability. The
following are the performance characteristics and applications of
alumina ceramics:
1. High hardness: Aluminum oxide ceramics have a very high
hardness, up to level 9, which is more than 8 times that of steel.
Therefore, they can be used to manufacture wear-resistant and
high-temperature resistant components.
2. High melting point: Aluminum oxide ceramics have a high melting
point of about 2050 ℃, making them suitable for use in
high-temperature environments. For example, they can be used to
manufacture high-temperature furnaces, heat exchangers, etc.
Aluminum oxide ceramics have a wide range of applications in
industries, scientific research, military and other fields. For
example, in automobile manufacturing, alumina ceramics can be used
to manufacture wear-resistant components such as brake pads and
clutch plates; In the aerospace field, alumina ceramics can be used
to manufacture high-temperature engine nozzles, turbine blades,
etc; In the medical field, alumina ceramics can be used to
manufacture dentures, bone implants, etc; In the chemical industry,
alumina ceramics can be used to manufacture reaction vessels, mass
transfer equipment, and so on.
Physicochemical indexes of alumina solid rod:
| Item | Unit | Typical Values |
| Physical Properties |
| Colour | | Ivory |
| Density | g/cm3 | 3.85 |
| Alumina Content | % | 99% |
| Gas Permeability | | 0 |
| Water Absorption | % | 0% |
| Physical Properties |
| MONS’Hardness | | 82 |
| Vickers Hardness(Hv50) | Gpa(kg/mm2) | 15.7(1600) |
| Flexural Strength(20℃) | Mpa | 330 |
| Compressive Strength(20℃) | Mpa | 2000 |
| Fracture Thoughness(20℃) | Mpam1/2 | 4 |
| Thermal Properties |
| Thermal Conductivity(20℃) | W/(m.k) | 27.5 |
| Thermal Expansion Coeffcient | 10-6/℃ | 7.6 |
| Thermal Shock Resistance | △T℃ | 200 |
| Maximum Use Temperature | ℃ | 1650 |
| Electrical Properties |
| Dielectric Strength | KV/mm | ＞12 |
| Dielectric Conatant | ε0 | 9-10 |
| Dielectric Loss Angle(1MHz) | | 0.0002 |
| Volume Resistivity(20℃) | Ω.cm | ＞1014 |
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