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| 99% Alumina Ceramic Properties | ||
| Item | Unit | |
| Physical Properties | ||
| Color | Ivory/Beige | |
| Density | g/cm3 | 3.85 |
| Alumina Content | % | 99% |
| Gas permeability | 0 | |
| Water Absorption | 0 | |
| Mechanical Properties | ||
| MONS' Hardness | Grade | 9 |
| Rockwell Hardness | HRA | 92 |
| Vickers Hardness (Hv50) | Gpa(Kg/mm²) | 15.7（1600） |
| Flexural Strength(20°C) | Mpa | 330 |
| Compressive Strength(20°C) | Mpa | 2000 |
| Fracture Toughness(20°C) | MPam1/2 | 4 |
| Modulus of Elasticity | Gpa | 350-400 |
| Thermal Properties | ||
| Thermal Conductivity(20°C-400°C) | W（m.K） | 27.5 |
| Thermal Expansion Coefficient | 10-6/°C | 7.6 |
| Thermal Shock Resistance | △T°C | 200 |
| Maximum Use Temperature | °C | 1650 |
| Electronic Properties | ||
| Dielectric Strength | KV/mm | ＞10 |
| Dielectric Constant | Er | 9.1 |
| Dielectric Loss Angle(1MHz) | 0.0002-0.0003 | |
| Volume Resistivity(20°C） | Ω.cm | ＞1014 |
Alumina (Al2O3) is a very common and widely used ceramic material. It is known for its excellent comprehensive performance and high reliability,
and is used in many demanding industrial fields.
1. Wide range of applications and balanced mechanical properties
Alumina is popular for its balanced mechanical properties, including high strength, high hardness and good wear resistance. These properties
enable alumina to play a key role in many fields.
High-temperature industrial applications: Alumina is very common in the manufacture of refractory materials for high-temperature industrial
furnaces. Its high melting point and stability allow it to work in extreme high-temperature environments without deformation or damage.
Electronic components: Alumina is also widely used in the electronics industry, especially in the manufacture of substrates, insulators, and
packaging materials. Its excellent electrical insulation and thermal conductivity make it an ideal material for electronic components.
2. Stability of chemical and physical properties
The stability of alumina's chemical and physical properties makes it an indispensable material in precision industries. These properties include heat
resistance, high thermal conductivity, high strength and hardness, as well as excellent electrical insulation and corrosion resistance.
Thermal properties: Alumina's heat resistance and good thermal conductivity make it very useful in applications that require rapid heat dissipation, such as in LED lighting and power electronics.
Mechanical properties: High strength and hardness ensure the durability of aluminum oxide when subjected to physical stress, which is
particularly important in aerospace and automotive manufacturing.
Other properties: Alumina's high electrical insulation and strong corrosion resistance make it suitable for chemical processing environments and
electrical applications. In addition, its high biocompatibility also makes it very popular in medical devices and bio-implant materials
