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The Most Well-known Oxide Ceramic Material
Aluminum Oxide (Al2O3)
Alumina ceramic, also known as aluminum oxide, is a type of ceramic material that is commonly used in various industrial applications due to its excellent combination of properties. Alumina ceramic is known for its high hardness, wear resistance, and chemical inertness, making it ideal for use in high-wear and high-temperature environments. It also has good thermal conductivity and electrical insulation properties, making it suitable for use in electronic and electrical applications.
Alumina ceramic is often used in the production of cutting tools, wear-resistant components, and high-temperature furnace parts. It is also used in the manufacturing of insulating components for electrical and electronic devices, such as substrates for integrated circuits and heat sinks. Additionally, alumina ceramic is used in the production of medical implants, automotive components, and various other industrial applications where high performance and reliability are required.
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 |
The Most Well-known Oxide Ceramic Material
Aluminum Oxide (Al2O3)
Alumina ceramic, also known as aluminum oxide, is a type of ceramic material that is commonly used in various industrial applications due to its excellent combination of properties. Alumina ceramic is known for its high hardness, wear resistance, and chemical inertness, making it ideal for use in high-wear and high-temperature environments. It also has good thermal conductivity and electrical insulation properties, making it suitable for use in electronic and electrical applications.
Alumina ceramic is often used in the production of cutting tools, wear-resistant components, and high-temperature furnace parts. It is also used in the manufacturing of insulating components for electrical and electronic devices, such as substrates for integrated circuits and heat sinks. Additionally, alumina ceramic is used in the production of medical implants, automotive components, and various other industrial applications where high performance and reliability are required.
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 |