MgAl₂O₄ (Magnesium Aluminate Spinel) Transparent Ceramic
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: MgAl₂O₄ (Magnesium Aluminate Spinel) Transparent Ceramic
MgAl₂O₄ (Magnesium Aluminate Spinel) transparent ceramic is a spinel-type compound with a crystal structure belonging to the cubic crystal system.
Product Introduction
MgAl₂O₄ (Magnesium Aluminate Spinel) Transparent Ceramic is a spinel-type compound with a crystal structure belonging to the cubic crystal system. Transparent magnesium aluminate spinel ceramics boast several advantages, including a wide transmission range, high strength, excellent thermal stability, and low manufacturing costs. This material exhibits remarkable optical transparency across the 0.19–7 μm wavelength range, with a theoretical maximum transmittance of up to 87%. Additionally, magnesium aluminate spinel boasts exceptional properties such as high hardness, superior mechanical strength, outstanding heat resistance, low emissivity, and remarkable resistance to sand and rain erosion. As a result, it holds immense potential for applications in areas like transparent armor, infrared windows, missile radomes, and solid-state lighting systems.
Key Advantages
- High hardness, high strength, and high-temperature resistance
- Low emissivity
- Advantages such as resistance to sand erosion and rain erosion
- High hardness/low density, making it ideal for transparent armor
- Isotropic structure/high-temperature stability, ideal for optical window applicationsApplication Areas
- Transparent armor materials
- Infrared window and high-mach missile fairing
-1.5μm eye-safe laser passive Q-switching technology's matrix material
- As a fluorescent material applied in fields such as white light LEDsProduct Features
Material Properties
Flexural Strength
250–350 MPa
Dielectric Constant
8.2–9 (1 kHz–1 MHz)
Density
3.58 g/cm³
Mohs Hardness
9 Mohs
Transparency Range
190–7000 nm
Transmittance (@532 nm)
87%
Lattice Constant
8.797–8.808 Å
Young's Modulus
260–310 GPa
Poisson's Ratio
0.26
Refractive Index (@532 nm)
1.7108
Abbe Number
60
Thermal Conductivity
14.7 W/m-K
Melting Point
2105–2135°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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