Alumina Ceramic The Ideal Material for High-Performance and Wear-Resistant Applications
Introduction
Alumina ceramic (Al₂O₃ ceramic) is an advanced ceramic material composed primarily of high-purity aluminum oxide. It exhibits exceptional wear resistance, high-temperature stability, and corrosion resistance. With high hardness and excellent chemical stability, it is widely used in mechanical, electronic, chemical, and medical applications.
Applications
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Industrial Field: Mechanical seals, bearings, nozzles, wear-resistant linings.
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Electronics: Circuit substrates, insulating components, semiconductor packaging.
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Chemical Industry: Corrosion-resistant reactors, pump and valve components.
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Medical Field: Artificial joints, dental restoration materials.
Advantages
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Superior Wear Resistance: Second only to diamond in hardness, ideal for high-wear environments.
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High-Temperature Resistance: Can operate stably at temperatures up to 1600°C.
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Corrosion Resistance: Highly resistant to acids, alkalis, and organic solvents.
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Excellent Insulation: High electrical resistivity, suitable for electronic applications.
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Biocompatibility: Safe for medical implants.
Technical Specifications
| Parameter | Value/Description |
| Alumina Content | 92%~99.9% |
| Density | 3.6~3.9 g/cm³ |
| Hardness | 9 Mohs |
| Flexural Strength | 300~400 MPa |
| Max. Service Temp. | 1600°C (short-term up to 1800°C) |
| Thermal Expansion | 7~8×10⁻⁶/°C (20~1000°C) |
Manufacturing Process
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Raw Material Preparation: Mixing high-purity alumina powder with binders.
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Forming: Dry pressing, injection molding, or isostatic pressing.
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Sintering: High-temperature (1600~1800°C) densification.
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Precision Machining: Grinding, polishing, laser cutting, etc.
Usage Instructions
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Avoid severe mechanical impact to prevent brittle fracture.
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In high-temperature environments, consider thermal shock effects.
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Ensure even force distribution during installation to prevent stress concentration.
After-Sales Service
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Product warranty (1-3 years, depending on application).
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Technical support: Selection, installation, and maintenance guidance.
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Customization: Adjust composition and dimensions per customer requirements.
FAQ
Q: Can alumina ceramic be used in strong acid environments?
A: Yes, it resists most acids (e.g., HCl, H₂SO₄), except hydrofluoric acid (HF).
Q: How does alumina ceramic perform in wear resistance?
A: Its hardness is second only to diamond, with wear resistance over 10 times that of steel.
Q: Are custom dimensions available?
A: Yes, precision machining can be tailored to specific needs.
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