Alumina Bar, Aluminum Oxide Bar
Alumina bars are high-purity ceramic rods made from aluminum oxide (Al₂O₃). They are known for their excellent thermal, electrical, and mechanical properties, making them ideal for high-temperature, corrosive, or electrically insulating applications.
Key Features:
- High thermal conductivity
- Exceptional electrical insulation
- Resistance to corrosion and wear
- High mechanical strength
- Stability in extreme temperatures (up to 1600°C or higher)
Alumina Bar Specifications
Composition | UNIT | Al95 | Al99 | Al997 |
Al2O3 Content | % | 95 | 99 | 99.7 |
Color |
| White | Ivory | Ivory |
Tensile Strength | Kpsi | 32 | 38 | 36 |
Flexural Strength | Kpsi | 52 | 55 | 54 |
Compressive Strength | Kpsi | 300 | 377 | 350 |
Density | g/cc | 3.70 | 3.90 | 3.92 |
Hardness | HV, GPa | 13.8 | 17.2 | 18 |
Thermal Conductivity | W/(m·K) | 25 | 30 | 30 |
C.O.T.E. | In / In°C (x10^-6) | 7.7 | 7.8 | 7.8 |
Working Temperature | °C | 1500 | 1650 | 1750 |
Dielectric Constant |
| 9.5 | 9.7 | 9.8 |
Volume Resistivity (25°C) | Ohm-cm | >10^14 | >10^14 | >10^14 |
Alumina Bar Applications
- High-Temperature Furnaces: Alumina bars are used as structural components in high-temperature furnaces and kilns due to their ability to withstand extreme temperatures without deformation or degradation.
- Wear-Resistant Parts: In industries such as mining and manufacturing, alumina bars are used as wear-resistant parts in equipment and machinery. Their hardness and durability make them ideal for components subjected to abrasive environments.
- Electrical Insulation: Alumina bars are used as electrical insulators in high-voltage and high-temperature applications. Their excellent dielectric properties ensure reliable performance in demanding electrical environments.
- Thermal Insulation: Due to their low thermal conductivity, alumina bars are used as thermal insulators in various high-temperature applications, helping to protect other components from heat and reduce energy loss.
- Aerospace Components: Alumina bars are utilized in the aerospace industry for components that require high strength, thermal stability, and resistance to wear and corrosion, such as engine parts and structural components.
- Optical Applications: Alumina bars are used in optical applications, including as substrates for optical coatings and components in laser systems, due to their high purity and excellent surface finish.
- Chemical Processing: In the chemical industry, alumina bars are used in reactors and processing equipment where high chemical resistance is required. They can withstand corrosive environments and maintain their integrity.
- Metallurgical Applications: Alumina bars are used in metallurgical processes, including as support structures and containment for molten metals. Their high melting point and chemical stability make them suitable for these applications
- Semiconductor Manufacturing: Alumina bars are employed in the semiconductor industry for applications requiring high purity and thermal stability, such as in diffusion furnaces and wafer processing equipment.
- Cutting Tools: Alumina bars are used to make cutting tools and inserts for machining hard materials. Their hardness and wear resistance enhance the performance and lifespan of these tools.
- Biomedical Applications: In the biomedical field, alumina bars are used to manufacture prosthetics, dental implants, and other medical devices due to their biocompatibility and mechanical strength.
- Research and Development: Alumina bars are used in R&D for various experimental setups that require materials with high thermal and chemical stability, ensuring reliable and consistent results.
Payment & Order Questions
Most Popular Questions
Alumina bars are available in various purity levels, typically ranging from 96% to 99.9%. Higher purity levels offer better performance in demanding applications.
We manufacture a variety of functional ceramics and structural ceramic components, including:
- Temperature control ceramic structural components
- Metallized ceramic tubes (for discharge tubes and fuse tubes)
- Water valve sheet series products
Absolutely. Alumina bars are highly resistant to thermal shock and can withstand temperatures up to 1600°C, making them ideal for furnace components, kiln furniture, and other high-heat applications.
Alumina bars offer a unique combination of strength, thermal stability, and electrical insulation, making them superior to many other ceramics like zirconia or silicon carbide in specific applications.
Lead times vary depending on the quantity and customization required. Standard sizes are typically available for immediate shipment, while custom orders may take 2-4 weeks. Contact us for an exact timeline.
Yes, our team of experts is available to help you choose the right alumina bars based on your application requirements, including purity, dimensions, and performance characteristics.
We use secure, industry-standard packaging to ensure the safe delivery of alumina bars. Shipping options include standard, expedited, and freight services, depending on your location and urgency.
MOQs depend on the product and customization. We accommodate both small-scale and bulk orders. Contact us to discuss your needs.
