new material
Barium fluoride circular window is a high-performance optical component designed for superior infrared and ultraviolet transmission, excellent chemical stability, and resistance to environmental degradation. Manufactured from high-purity BaF₂, it offers outstanding optical clarity, low refractive index, and durability, making it an essential material for spectroscopy, aerospace applications, laser systems, and precision scientific instruments. Its resistance to moisture and harsh conditions ensures reliable performance in advanced optical technologies.
Product Overview
Barium fluoride circular windows are high-quality optical materials widely used as protective windows for electronic sensors and environmental detectors. Their high transparency and thermal stability make them excellent in both infrared and visible light ranges, particularly suited for applications requiring high-temperature resistance, chemical corrosion resistance, and high-precision optical systems. Barium fluoride can transmit a significant amount of light in the 200nm to 11μm wavelength range, making it ideal for low-temperature cryogenic imaging, aerospace optics, and various optical components in laser optical systems.
Key Features
- High Transparency: Excellent transmission in both infrared and visible light ranges, suitable for use as optical window material.
- Thermal Stability: Good thermal stability, ensuring stable performance in high-temperature environments.
- Chemical Stability: Insoluble in water and resistant to corrosion from various chemicals, making it suitable for harsh environments.
- Excellent Polishing Performance: The surface can be finely polished to ensure high smoothness and clarity, ideal for precision optical systems.
- Brittleness: Although barium fluoride has high transparency, it is sensitive to thermal shock and prone to cracking. Therefore, caution should be exercised in environments with temperature fluctuations.
Applications
- Infrared Optical Systems: Widely used as optical windows, lenses, and filters in infrared sensors, lasers, and infrared optical systems.
- Low-Temperature Cryogenic Imaging: Used as optical windows or optical lenses in cryogenic imaging systems.
- Aerospace Optical Systems: A key material in various optical devices used in aerospace applications.
- Laser Optical Systems: Used as lenses, beam splitters, and windows in laser optical systems to enhance system performance.
- Other High-Precision Optical Systems: Due to its excellent optical properties, barium fluoride is also widely used in other high-precision optical systems.
| Optical Properties | Value |
| Transmission Range | 0.15-14μm |
| Transmittance | >94% @ 0.35μm - 10.8μm |
| Refractive Index | 1.462 @ 2.58μm |
| 1.45 @ 5μm | |
| Reflection Loss | 6.8% @ 2.58μm (both surfaces) |
| 6.5% @ 5μm (both surfaces) | |
| 5.3% @ 10.35μm (both surfaces) | |
| Absorption Coefficient | 3.2×10<sup>-4</sup> @ 6μm |
| Structure | Cubic Crystal System |
| Cleavage Planes | <111> |
| Physical Properties | Value |
| Density | 4.89 g/cm<sup>3</sup> |
| Melting Point | 1386 ℃ |
| Thermal Conductivity | 11.72 W/(m×K) @ 286K |
| Thermal Expansion | 18.1 × 10<sup>-6</sup>/K @ 273K |
| Knoop Hardness | 82 kg/mm<sup>2</sup> |
| Specific Heat | 410 J/(kg×K) |
| Dielectric Constant | 7.33 @ 1 MHz |
| Young's Modulus | 53.07 GPa |
| Shear Modulus | 25.4 GPa |
| Bulk Modulus | 56.4 GPa |
| Poisson's Ratio | 0.343 |
| Chemical Properties | Value |
| Solubility | 1.7g @ 20℃ |
| Molecular Weight | 175.3238 g/mol |
| Parameter | Range |
| Diameter Range | 2-300 mm |
| Thickness | 0.12-60 mm |
| Surface Finish | 80-50, 60-40, 40-20, 20-10, 10-5 |
| Surface Accuracy | λ/2, λ/4, λ/8, λ/10 |
| Parallelism | <3' - 30" |
| Aperture Transmission | >90% |
| Coating | Customizable |
