Aluminum Oxide (Al₂O₃) – Excellence in Insulation & Strength
Aluminum Oxide, commonly known as alumina, is a high-performance ceramic material with outstanding electrical insulation, exceptional thermal stability, and remarkable mechanical strength. It is a preferred choice in demanding hermetic assemblies across aerospace, defense, and medical industries.
Material Properties
- Chemical Formula: Al₂O₃
- Density: 3.95–4.1 g/cm³
- Melting Point: 2,072°C (3,762°F)
- Boiling Point: 2,977°C (5,391°F)
- Thermal Conductivity: 20–30 W/m·K
- Coefficient of Thermal Expansion: 6–8 × 10⁻⁶ /K
- Electrical Resistivity: >10¹⁴ Ω·cm
- Dielectric Constant: ~9–10 (at 1 MHz)
- Compressive Strength: ~2,000 MPa
- Flexural Strength: 300–400 MPa
- Elastic Modulus: 300–400 GPa
- Hardness (Mohs): 9
Typical Applications of Al₂O₃
Hermetic Feedthroughs
Used as insulators in multi-pin feedthroughs for high-voltage and high-pressure applications.
Sensor Housings
Provides structural integrity and electrical isolation for sensors exposed to harsh environments.
Medical Implants
Biocompatibility and chemical resistance make it suitable for implantable medical devices.
Vacuum Systems
Performs well under vacuum and high-temperature conditions in scientific instruments.
Plasma Chambers
Thermally stable and erosion-resistant in plasma-processing environments.
High-Frequency Circuits
Its stable dielectric properties support RF and microwave circuitry in hermetic packaging.
Enhance Your Hermetic Solutions with Aluminum Oxide
Leverage the strength and stability of alumina in your next project. Partner with Advanced Hermetic Solutions for reliable materials integration and precision engineering.
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