Alumina ceramic tubes are highly valued for their exceptional temperature resistance, capable of withstanding up to 1800°C, making them ideal for demanding high-temperature applications. Their mechanical and thermal properties, such as high flexural strength, excellent thermal conductivity, and corrosion resistance, further enhance their suitability for industrial and laboratory use. These tubes are customizable in size and shape, ensuring adaptability to specific needs across various sectors, including vacuum furnaces, sintering processes, and electrical applications.
Key Points Explained:
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Temperature Resistance
- Alumina ceramic tubes can endure temperatures up to 1800°C, making them suitable for extreme environments like atmosphere retort furnaces, vacuum tube electric furnaces, and sintering bioceramics.
- Their stability at high temperatures is due to their 99.7% high-purity alumina composition, precision molding, and high-temperature sintering process.
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Mechanical Properties
- Flexural strength: 300–340 MPa, ensuring durability under mechanical stress.
- Hardness: 12.2–13.5 GPa, providing resistance to wear and abrasion.
- Young’s modulus: 280–320 GPa, indicating high stiffness and structural integrity.
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Thermal Properties
- Thermal conductivity: 16–23 W/(m·K), facilitating efficient heat transfer.
- Coefficient of thermal expansion: 7.2–7.3 × 10⁻⁶ mm/°C (25–500°C), ensuring dimensional stability across temperature ranges.
- Specific heat: 0.78 × 10³ J/(kg·K), contributing to energy efficiency in heating applications.
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Electrical and Insulation Properties
- Dielectric strength: 14–15 × 10⁶ V/m, making them excellent electrical insulators.
- Dielectric constant: 9.0–9.4 at 1 MHz, suitable for high-frequency applications.
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Applications
- Used in high-temperature industrial processes (e.g., float glass manufacturing, aluminum trichloride production).
- Serve as burner holes in kilns, electrical cable lead-outs, and temperature measurement components.
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Customization Options
- Available in custom sizes and shapes, with features like flanges or grooves to meet specific requirements.
- Adaptable to both metric and standard American measurements.
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Maintenance and Cleaning
- Require ultrasonic cleaning to maintain performance and longevity.
Alumina ceramic tubes are a cornerstone of modern high-temperature technology, quietly enabling advancements in industries from healthcare to energy. Their blend of thermal resilience, mechanical robustness, and adaptability ensures they remain indispensable in critical applications.
Summary Table:
| Property | Value Range |
|---|---|
| Max Temperature | Up to 1800°C |
| Flexural Strength | 300–340 MPa |
| Hardness | 12.2–13.5 GPa |
| Thermal Conductivity | 16–23 W/(m·K) |
| Dielectric Strength | 14–15 × 10⁶ V/m |
| Applications | Vacuum furnaces, sintering, electrical insulation |
Upgrade your high-temperature processes with precision-engineered alumina ceramic tubes!
KINTEK’s expertise in advanced ceramics ensures tailored solutions for your lab or industrial needs. Our in-house R&D and manufacturing capabilities guarantee products that meet the most demanding thermal and mechanical requirements. Whether you need standard or custom-designed tubes, contact us today to discuss how we can enhance your applications with our high-performance solutions.
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