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HaoRui
custom 01017
The Most Well-known Oxide Ceramic Material
Properties of Alumina/Aluminum Oxide (Al2O3)
Alumina, or aluminum oxide (Al2O3), is a versatile material with a wide range of properties that make it suitable for various industrial applications. Some of the key properties of alumina include:
High hardness: Alumina is a very hard material, ranking 9 on the Mohs scale of mineral hardness. This property makes it highly resistant to wear and abrasion.
Excellent wear resistance: Alumina exhibits exceptional wear resistance, making it suitable for use in applications where materials are subjected to high levels of friction and abrasion.
High temperature resistance: Alumina has a high melting point and can withstand temperatures up to 1600°C, making it ideal for use in high-temperature applications such as furnace linings and ceramic crucibles.
Good thermal conductivity: Alumina has good thermal conductivity, allowing it to efficiently transfer heat and resist thermal shock.
Electrical insulation: Alumina is an excellent electrical insulator, making it suitable for use in electrical and electronic applications where high voltage insulation is required.
Chemical inertness: Alumina is chemically inert and resistant to most chemicals, acids, and alkalis, making it suitable for use in corrosive environments.
Biocompatibility: Alumina is biocompatible and non-toxic, making it suitable for use in medical implants and prosthetics.
Overall, the combination of these properties makes alumina a highly versatile material that is used in a wide range of applications across various industries.
| Property | Item | 95% Al2O3 | 99% Al2O3 | 99.8%Al2O3 | Unit |
| Mechanical Characteristics | Color | White | light yellow | Ivory | |
| Bulk Density | 3.7 | 3.85 | 3.93 | g/cm3 | |
| Water Absorption | 0 | 0 | 0 | % | |
| Bending Strength | 300 | 310 | 370 | MPa | |
| Compressive Trength | 2,300 | 2,400 | 2500 | MPa | |
| Elastic Modulus | 320 | 340 | 390 | GPa | |
| Fracture Toughness | 3~4 | 3~4 | 4 | MPa m1/2 | |
| Weber Coefficient | 12 | 12 | 12 | m | |
| Vickers Hardness | 1,400 | 1,600 | 1850 | HV 0.5 | |
| Thermal Characterics | Coefficient of Line Thermal Expansion | 7~8 | 7~8 | 7~8 | 10-6 K-1 |
| Thermal Conductivity | 20 | 29 | 32 | W/mK | |
| Thermal Shock Resistance (Put in Water) | 250 | 200 | 280 | ΔT °C | |
| Max Working Temperature | 1,500 | 1,600 | 1700 | °C | |
| Electrical Characteristics | Volume Resistance At 20°C | >1014 | >1014 | >1014 | Ωcm |
| Dielectric Strength | 15×106 | 15×106 | 15×106 | V/m | |
| Dielectric Constant | 9 | 10 | 10 | εr | |
| One MHZ Dielectric Loss Angle at 20°C | 0.0004 | 0.0002 | 0.0001 | tanδ | |
| Chemical Characteristics | Nitric Acid (60%) 90°C | 0.1 | 0.1 | 0.05 | 24H WT Loss mg/cm2 |
| Sulphuric Acid (95%) 95°C | 0.3 | 0.34 | 0.22 | ||
| Caustic Soda (30%) 80°C | 0.9 | 0.95 | 0.04 |
Company overview
Shenzhen Haorui Industrial Technology Co., Ltd. is a professional manufacturer of advanced engineering ceramic components, with 19 years of industry experience since its establishment in June 2006. Haorui specializes in the precision machining of zirconia ceramic and alumina ceramic structural parts, serving demanding applications in the semiconductor and optical fiber communication industries. With in-house CNC machining, precision grinding, fine polishing and strict inspection processes, we are capable of producing high-precision ceramic components with tight tolerances and stable dimensional accuracy. Our engineering ceramic products are widely used in semiconductor equipment, fiber optic fusion splicers, optical fiber alignment systems, microelectronic devices and precision optoelectronic equipment, where material purity, machining accuracy and long-term stability are critical. Haorui supports OEM & ODM customization, accepting CAD / STEP / PDF drawings, and provides reliable solutions from prototype development to mass production. Backed by a complete quality management system and experienced technical team, we deliver zirconia ceramic structural components with excellent wear resistance, low particle generation and high consistency, suitable for cleanroom and precision environments. Over the past 19 years, Haorui has served more than 1,000 customers worldwide and maintained close cooperation with over 30 universities and research institutions, earning a strong reputation for precision, reliability and professional service in the advanced ceramics industry.




