new material
Hot-Pressed Polycrystalline Magnesium Fluoride (HP MgF₂) is a high-performance optical material known for its superior transparency, excellent mechanical strength, and resistance to environmental degradation. Produced through hot-pressing technology, this polycrystalline material offers outstanding durability, making it ideal for infrared optics, laser systems, aerospace applications, and precision scientific instruments. Its high resistance to thermal fluctuations and low optical distortion ensure reliable performance in demanding optical environments.
Product Overview
Hot-Pressed Polycrystalline Magnesium Fluoride (HP MgF2) is a cost-effective material for mid-wave infrared optics. It offers excellent optical transmittance, thermal shock resistance, and chemical corrosion resistance. HP MgF2 is commonly used for infrared windows, as well as dual-mode transmission materials for millimeter-wave (microwave) and infrared systems. Magnesium fluoride, produced via hot-pressing, exhibits excellent performance in mid-wave infrared optical systems, with low thermal radiation coefficient and good mechanical strength, making it ideal for high-performance infrared optical devices.
Key Features
- High Transmittance: In the 3-5μm waveband, the transmittance can reach up to 92% (at 2mm thickness).
- Excellent Thermal Properties: Low thermal expansion coefficient and good thermal shock resistance, ensuring stability under extreme temperature variations.
- Good Mechanical Properties: High compressive strength (≥300MPa) and bending strength (≥100MPa).
- Chemical Corrosion Resistance: Resistant to various chemicals, making it suitable for harsh environments.
- Isotropic and Low Dielectric Constant: Ensures stability in various operational environments, suitable for electromagnetic field applications.
- Low Dielectric Loss: The dielectric loss tangent is 0.001, ensuring efficient optical and electromagnetic transmittance.
Applications
- Infrared Optical Systems: Used as mid-wave infrared windows, widely applied in infrared tracking, detection, and search equipment.
- Infrared Imaging and Monitoring Devices: Used in infrared cameras, night vision devices, and other monitoring equipment.
- Millimeter-Wave and Infrared Dual-Mode Transmission Materials: Suitable for dual-mode applications in millimeter-wave and infrared systems, meeting the optical needs of different wavebands.
- Aerospace and Military Applications: Used in optical windows for spacecraft, ensuring stability in high-temperature and high-pressure environments.
- Scientific Research and Experimental Equipment: Used as high-performance optical window material for various high-precision scientific experimental devices.
| Property | Value |
| Transmission Wavelength | 3～5 μm |
| Transmittance | ≥92% (2 mm thickness) |
| Density | ≥3.17 g/cm³ |
| Compressive Strength | ≥300 MPa |
| Knoop Hardness | ≥5.39 GPa |
| Flexural Strength | ≥100 MPa |
| Poisson's Ratio | 0.25-0.36 |
| Elastic Modulus | ≥110 MPa |
| Dielectric Constant | 5.1 |
| Dielectric Loss Tangent | 0.001 |
| Thermal Expansion Coefficient | ≤1.3×10⁻⁵ K⁻¹ (25℃～300℃) |
| Refractive Index | 1.3816±0.005 (λ=0.5893 μm) |
| 1.3524±0.0005 (λ=4 μm) |
