Alumina Ceramic Gaskets High-Purity Material With Density Of 3.6-3.9 G/Cm Sup3 And Flexural Strength Of 300-400 MPa
Alumina Ceramic Gaskets High-Purity Material With Density Of 3.6-3.9 G/Cm Sup3 And Flexural Strength Of 300-400 MPa
Product Introduction
Alumina ceramic corrosion-resistant gaskets are industrial sealing components made from high-purity alumina (Al₂O₃) material, featuring exceptional corrosion resistance, high hardness, and excellent high-temperature performance. With purity typically reaching 95% or 99% and above, these gaskets boast high density and a compact structure, effectively resisting erosion from strong acids, alkalis, and organic solvents. They are an ideal sealing material for demanding working conditions.
Primary Applications
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Chemical Industry: Reactors, pipeline flanges, pump and valve seals
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Semiconductor Manufacturing: High-purity chemical delivery systems
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Power & Energy: Equipment handling corrosive media
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Pharmaceutical & Food Industry: Sealing in sterile corrosive environments
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Environmental Protection Equipment: Wastewater and exhaust gas treatment devices
Key Advantages
✅ Superior Corrosion Resistance: Resists all acids and alkalis except HF
✅ High-Temperature Resistance: Long-term service temperature up to 1600°C
✅ Exceptional Hardness: Mohs hardness of 9, outstanding wear resistance
✅ Excellent Insulation: Volume resistivity >10¹⁴Ω·cm
✅ Dimensional Stability: Low thermal expansion coefficient, no deformation
Specifications Table
| Parameter | Value |
|---|---|
| Material Purity | 95%/99% Al₂O₃ |
| Density | 3.6-3.9 g/cm³ |
| Flexural Strength | 300-400 MPa |
| Thermal Expansion Coefficient | 7-8×10⁻⁶/°C |
| Operating Temperature | -50°C to 1600°C |
| Compressive Strength | ≥850 MPa |
| Surface Roughness | Ra≤0.2μm (customizable) |
Production Process
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Raw Material Preparation: High-purity alumina powder formulation
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Forming Process: Dry pressing/isostatic pressing
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Sintering Treatment: High-temperature sintering at 1600-1800°C
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Precision Machining: CNC grinding for dimensional accuracy
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Quality Inspection: Dimensional tolerance/density/strength testing
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Surface Treatment: Polishing or special coating (optional)
Usage Instructions
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Clean sealing surfaces before installation to ensure no impurities
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Use a torque wrench and tighten gradually in a diagonal sequence
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Avoid localized stress concentration to prevent cracking
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Regularly inspect sealing condition; recommended replacement cycle: 2-5 years
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For extreme conditions, consider using with flexible graphite gaskets
After-Sales Service Commitment
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24/7 technical support team response
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Free replacement for non-human damage
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Customized solutions available
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Regular customer follow-up services
Frequently Asked Questions (FAQ)
Q: Can it withstand hydrofluoric acid (HF) corrosion?
A: No, alumina reacts with HF. Silicon carbide material is recommended instead.
Q: What is the maximum manufacturable size?
A: Standard diameter ≤500mm; larger sizes require custom orders.
Q: How to identify genuine products?
A: Conduct density tests (≥3.6g/cm³) and XRD composition analysis.
Q: Is it electrically conductive?
A: Fully insulating, with volume resistivity >10¹⁴Ω·cm.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.