Magnesium Aluminate Spinel (MgAl2O4)
MgAl₂O₄ Spinel Transparent Ceramic features a broad transmission range from UV to MIR. It exhibits high mechanical strength, exceptional resistance to high temperatures and thermal shock, along with excellent durability against acid/alkali corrosion, sand erosion, and rain erosion. These properties make it suitable for a wide variety of applications. In the UV, MgAl₂O₄ Spinel has a short cut-off wavelength, extending down to 160 nm. Its refractive index increases significantly as the incident light wavelength decreases, making it well-suited for use as UV lithography windows and miniaturized lenses. Within the visible spectrum, MgAl₂O₄ Spinel demonstrates high transmittance while offering advantages such as low density, high strength, and suitability for mass production. These characteristics enable it to serve as a replacement for bulletproof glass and sapphire in lightweight, high-performance armor materials. MgAl₂O₄ Spinel is an ideal candidate material for infrared windows and radomes, and is also suitable for use in barcode scanners, watches, night vision systems, and high-temperature protective viewports
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Overview
Specifications
| Parameter | Value |
|---|---|
| Melting Point | 2105-2135 °C |
| Lattice Constant | 8.797-8.808 Å |
| Density | 3.58 g/cm³ |
| Young's Modulus | 260-310 GPa |
| Shear Modulus | 192 GPa |
| Poisson Ratio | 0.26 |
| Vickers Hardness | 12.0-16.8 GPa |
| Fracture Strength | 190-400 MPa |
| Fracture Toughness | 1.4-2 MPa·m^(-1/2) |
| Dielectric Constant [1KHz-1MHz] | 8.2-9 |
| Refractive Index [@532nm] | 1.7108 |
| Abbe Number | 60 |
| Transmittance Range | 0.19-7.0 μm |
| Theoretical Tranmittance [@532nm] | 87% |
| Thermal Expansion Coefficient [25-100°C] | 6.09×10⁻⁶ |
| Thermal Expansion Coefficient [25-500°C] | 7.3×10⁻⁶ |
| Thermal Expansion Coefficient [25-1000°C] | 7.9×10⁻⁶ |
| Thermal Conductivity | 14.7 W/m·K |
| Resistance to Chemical Corrosion | HF,H2SO4,HNO3,NaOH |
| Rain Erosion Resistance [756km/h, 20min, Ø2mm] | Non-Destructive |
| Sand Erosion Resistance [75m/s, 3mg/cm2, 38-44gm] | Non-Destructive |
Applications
Key Features
Datasheet
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