Al₂O₃ (Aluminum Oxide) Transparent Ceramic
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: Al₂O₃ (Aluminum Oxide) Transparent Ceramic
Al₂O₃ (Aluminum Oxide) transparent ceramic refer primarily to a polycrystalline material with translucency, manufactured using aluminum oxide ceramic techniques. This material not only inherits the inherent properties of aluminum oxide ceramics—such as high hardness, exceptional strength, corrosion resistance, high-temperature durability, and outstanding chemical stability—but also exhibits remarkable optical transparency.
Product Introduction
Al₂O₃ (Aluminum Oxide) transparent ceramic refer primarily to a polycrystalline material with translucency, manufactured using alumina ceramic processing techniques. This material not only retains the exceptional hardness, high strength, corrosion resistance, thermal stability, and excellent chemical inertness characteristic of traditional alumina ceramics but also exhibits glass-like optical properties, along with superior dielectric performance—features that no other material can match. Additionally, it boasts optical qualities comparable to those of single-crystal sapphire. Thanks to these outstanding attributes, transparent alumina ceramics are widely employed in fields such as laser technology, high-temperature applications, lighting, and wireless electronics.
Key Advantages
- High thermal resistance, relatively high thermal conductivity
- High strength, high hardness
- Electrical insulation, corrosion resistance, biocompatibilityApplication Areas
- Infrared optical components
- Laser field
- High-temperature-resistant observation window
- Superconducting quantum bit packaging cavity
- Hypersonic vehicle infrared Window
- Superconducting quantum bit packaging cavityProduct Features
Material Properties
Dielectric Constant
9.8 (1 kHz –1 MHz)
DC Breakdown Strength
≥25 kV/mm
Density
3.98 g/cm³
Mohs Hardness
9 Mohs
Transmittance
>90%
Flexural Strength
350 MPa
Refractive Index
1.768
Thermal Expansion Coefficient
(6.5~8.5)×10-6/°C
Thermal Conductivity
20~30 W/(m·K)
Melting Point
2050°C
Product Processing Indicators
Effective Aperture
>90%
Dimensions
Customized to Customer Specifications
Diameter Tolerance
+0/-0.05 mm
Length Tolerance
±0.1 mm
Chamfer
≤0.3×45°
Surface Quality
40-20 S-D
Flatness
≤λ/6 @ 632.8 nm
Parallelism
<20"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Coating
Customized to Customer Specifications
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- Excellent transparency and infrared light transmittance
- Resistance to alkali metal vapor corrosion
- High melting point, high thermal conductivity
- Lower theoretical density, high insulation -
- Manufacturing infrared windows and fairings for spacecraft, rockets, and missiles,
- High-temperature furnace infrared windows, high-temperature infrared optical devices
- Optical filters and optical detectors
- Key materials for high-pressure sodium lamp tubes and infrared detector housings -
Material Properties Crystal structure Cubic Dielectric constant (1 kHz – 1 MHz) 9.65 Density 3.58g/cm3 Hardness 6.8 (Mohs) Optical transmission >90% @ (200–1000 nm) Lattice constant (Å) 4.130 Å Purity 99.95% Flexural Strength (MPa) 134MPa Refractive index 1.736 Coefficient of thermal expansion 11.2 × 10⁻⁶ (/°C) Thermal conductivity (W/m-K) 36 W/m-K at 300 K Melting point 2800°C Product Processing Metrics Effective Aperture >90% Dimensions Customized to customer specifications Diameter Tolerance +0 / -0.05 mm Length Tolerance ±0.1 mm Protective Chamfer ≤0.3 × 45° Surface finish 40-20 S-D Flatness ≤λ/6 @ 632.8 nm Parallelism <20" Verticality ≤15′ Chipped edge <0.1 mm Coating Customized to customer specifications
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