Alumina Disc
High-Quality Alumina Discs (Al₂O₃ Ceramic Discs) – Custom Manufacturing Available
Alumina Disc
Alumina discs, also known as Al₂O₃ ceramic discs, are precision-engineered from high-purity aluminum oxide materials. Renowned for their exceptional mechanical strength, these ceramic discs feature large diameters, smooth and uniform surfaces, and outstanding resistance to wear, corrosion, and extreme temperatures. Their durability and performance make them ideal for demanding industrial applications, including electronics, chemical processing, and high-temperature environments.
At Edgetech Industries – Advanced Ceramics Division, we specialize in custom-manufactured alumina ceramic discs tailored to your exact specifications. Whether you need standard sizes or unique geometries, we work closely with clients to deliver high-performance ceramic solutions that meet rigorous quality standards.
Specifications of Typical Alumina Ceramics
| Item | Unit | Al2O3 |
| Physical Property | ||
| Color | Ivory | |
| Density | g/cm3 | 3.7-3.9 |
| Purity | % | 95~99.8 |
| Gas Permeability | 0 | |
| Water Absorption | 0% | |
| Mechanical Properties | ||
| Vickers Hardness | GPa | 12.3-17.2 |
| Flexural Strength | MPa | 300-380 |
| Compressive Strength (HV0.5) | MPa | 2000-2350 |
| Elastic modulus | GPa | 270-380 |
| Fracture Toughness | MPa m1/2 | 3.5-4 |
| Thermal Properties | ||
| The Max Working Temperature | ℃ | 1650 |
| Thermal Conductivity at room temperature | W/(m·K) | 20-32 |
| Coefficient of Thermal Expansion | 10-6/℃ | 6.5-7.2 |
| Thermal Shock Resistance | △T℃ | 200 |
| Electrical Properties | ||
| Dielectric Strength | KV/mm | 10-15 |
| Dielectric Constant | 9-10 | |
| Dielectric Loss Angle(1MHz) | 0.0002-0.0003 | |
| Volume Resistivity | Ω·cm | >1014 |
The above chart illustrates the typical properties of the common alumina ceramic used to produce our alumina parts. Please note that the properties of customized alumina parts vary due to different processing.
Typical properties of Alumina Ceramic Discs
Al2O3 Disc
-Excellent wear resistance, can be used for a long time under high-speed friction, grinding, and grinding conditions without obvious wear.
-Good corrosion resistance, can work for a long time in corrosive media such as acids and alkalis without being corroded, suitable for corrosive working environments in the fields of chemistry and electronics.
-Excellent high-temperature resistance, will not soften or melt in high-temperature environments, can operate stably for a long time in high-temperature furnaces, heat treatment equipment, and other processes, and is widely used in high-temperature industries such as metallurgy and glass.
Applications of Alumina Ceramic Discs in Industrial and Commercial Sectors
Large-diameter alumina ceramic discs are highly versatile components used across a wide range of industries, including electronics, metallurgy, chemical processing, glass manufacturing, and the food industry. Due to their superior thermal stability, electrical insulation properties, and mechanical strength, these discs serve as critical materials in several applications.
In the electronics sector, alumina discs are frequently utilized as insulating and conductive substrates in the production of semiconductors, sensors, and other electronic devices. In the chemical industry, they act as catalyst carriers, providing stable surfaces that enhance reaction efficiency and chemical durability under harsh conditions. Additionally, alumina discs are essential in the production of industrial abrasives and precision cutting tools—such as grinding wheels, abrasive stones, and ball mills—used for shaping, cleaning, and processing a variety of hard and soft materials.
Their multifunctional properties and reliability make alumina ceramic discs a go-to solution for engineers and manufacturers seeking performance, longevity, and cost-effective operation in high-demand environments.
Packing of Alumina Ceramics
Our Alumina Discs are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used, and vacuum packing is also employed for some of the parts.
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