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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. Good insulation performance: Aluminum oxide ceramics have
excellent insulation performance, can withstand high voltage and
high frequency electric fields, and can be used to manufacture
high-voltage capacitors, dielectric materials, etc.
2. Good chemical stability: Aluminum oxide ceramics have good
chemical stability and can resist corrosion from acids, alkalis,
solvents, etc. They are widely used in chemical, medical,
biological and other fields.
3. Easy to process and shape: Aluminum oxide ceramics can be formed
through processes such as pressing, grouting, and spraying to
produce various shaped components. For example, they can be used to
manufacture ceramic cutting tools, ceramic seals, 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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