Barium Fluoride (BaF2)
Barium Fluoride (BaF2) is an optical material with high transmittance across a wide spectral range (ultraviolet to infrared), particularly excelling in applications such as infrared spectroscopy and high-speed radiation detection.
Features
- Broadband Transmittance: Transmission range from 0.2 to 11.5μm
- Extremely Fast Fluorescence Response Time (especially in the ultraviolet region), making it ideal for radiation detector applications
- Low Refractive Index: Approximately 1.46 at a wavelength of 2.5μm
- Excellent machinability, approximately 1.46 at a wavelength of 2.5μm
- Relatively Affordable optical material for infrared applications
Examples of Applications
- Infrared spectroscopy windows, prisms, and lenses
- Ultraviolet laser optical systems
- Scintillators for radiation detection
- Optical systems for IR instruments
Features
| Basic Physical Properties | |
|---|---|
| Material | BaF2 |
| Transmission Wavelength Range (µm) | 0.15～13 |
| Color | Colorless |
| Density (g/cc) | 4.83 |
| Melting Point (℃) | 1280 |
| Solubility (g･100gH2O) (30℃) | 0.162 |
| Molecular Weight | 175.36 |
| Crystal System | Isometric System |
| Crystal Structure | Fluorite Type |
| Cleavage Plane | {111} |
| Thermal Properties | |
|---|---|
| Coefficient of Linear Expansion α (/℃) (0℃) | 18×10-6 |
| Thermal Conductivity λ (cal/cm･sec･℃) | 2.8×10-2 |
| Specific Heat Cp (cal/g･℃) | 0.098 |
| Mechanical Properties | |
|---|---|
| Knoop Hardness Hk | 82 |
| Young's Modulus E (GPa) | 66.1 |
| Shear Modulus G (GPa) | 25.4 |
| Poisson's Ratio | 0.343 |