MSDS File
Introduction
Magnesium Fluoride Evaporation Materials (MgF₂) are industry-standard sources for producing low refractive index optical thin films. Known for their exceptional transparency from the ultraviolet (UV) to the infrared (IR) region, MgF₂ films are widely used in anti-reflection (AR) coatings, precision optics, and multilayer interference systems.
In physical vapor deposition (PVD) processes such as thermal evaporation and electron beam evaporation, MgF₂ is valued for its stable evaporation behavior and optical performance. High-purity MgF₂ evaporation materials ensure consistent film density, low absorption loss, and excellent environmental durability.
Detailed Description
Magnesium Fluoride (MgF₂) is a crystalline fluoride compound with a melting point of approximately 1263°C and excellent optical transparency across a broad spectral range (UV to IR). Its low refractive index (~1.38 at 550 nm) makes it one of the most important materials for anti-reflection coatings.
Key features include:
High Optical Purity (typically 3N–5N) – Minimizes scattering and absorption in optical films.
Stable Stoichiometric Composition – Ensures predictable refractive index and film performance.
Low Moisture Sensitivity Compared to Other Fluorides – Improves handling stability under controlled conditions.
Optimized Particle or Pellet Form – Promotes uniform melting and reduces spitting during evaporation.
MgF₂ evaporation materials are supplied in powder, granule, or pellet form compatible with tungsten boats, molybdenum crucibles, or graphite liners. Electron beam evaporation is commonly preferred for higher film density and better optical performance, though thermal evaporation is also widely used.
Process parameters such as substrate temperature and deposition rate can significantly influence film packing density and optical properties, especially in high-performance AR coatings.
Applications
Magnesium Fluoride Evaporation Materials are extensively used in:
Anti-Reflection (AR) Coatings
Single-layer or multilayer AR films for lenses, displays, and optical windows.UV Optical Systems
Coatings for UV-grade optics and lithography components.Laser Optics
Protective and performance-enhancing layers in laser systems.Infrared (IR) Optical Components
Transparent coatings in IR imaging and sensing equipment.Precision Multilayer Interference Filters
Low-index layers combined with high-index materials for spectral control.
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Purity | 99.9% – 99.999% (3N–5N) | Reduces optical loss and contamination |
| Chemical Formula | MgF₂ | Ensures stable refractive index |
| Refractive Index | ~1.38 (550 nm, thin film) | Ideal for AR applications |
| Melting Point | ~1263°C | Suitable for thermal & e-beam evaporation |
| Form | Powder / Granules / Pellets | Compatible with deposition systems |
| Packaging | Vacuum-sealed / moisture-protected | Maintains chemical stability |
Comparison with Related Fluoride Materials
| Material | Key Advantage | Typical Application |
|---|---|---|
| Magnesium Fluoride (MgF₂) | Very low refractive index & wide transparency | Anti-reflection coatings |
| Lanthanum Fluoride (LaF₃) | Higher refractive index fluoride | Multilayer optical stacks |
| Yttrium Fluoride (YF₃) | Good durability & optical clarity | Laser coatings |
| Aluminum Fluoride (AlF₃) | UV transparency | Specialized UV optics |
Compared to other fluoride materials, MgF₂ remains the preferred low-index material in optical coating design due to its balanced optical performance, stability, and processing reliability.
FAQ
| Question | Answer |
|---|---|
| Is MgF₂ suitable for both thermal and e-beam evaporation? | Yes, it is compatible with both methods, though e-beam often provides higher density films. |
| What purity grade is recommended for optical coatings? | 4N or higher is typically preferred for precision optical applications. |
| Does MgF₂ absorb moisture? | It is relatively stable but should still be stored in dry, sealed packaging. |
| Can pellet size be customized? | Yes, granule and pellet dimensions can be tailored to specific source designs. |
| Which industries use MgF₂ films most? | Optics manufacturing, laser systems, display technology, and research institutions. |
Packaging
Our Magnesium Fluoride Evaporation Materials are meticulously tagged and labeled externally to ensure efficient identification and maintain high standards of quality control. We take great care to prevent any potential damage during storage and transportation, ensuring the materials arrive in perfect condition.
Conclusion
Magnesium Fluoride Evaporation Materials (MgF₂) provide a reliable and high-purity solution for producing low-index, optically transparent thin films. With stable composition, flexible supply formats, and compatibility with common evaporation techniques, MgF₂ remains a foundational material in advanced optical coating systems.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Material | Size | Quantity | Purity | Part Number |
| Magnesium Fluoride | 1mm - 2.5mm Pieces | 1 kg | 99.99% | EVMMGF-1-2.5 |
| Magnesium Fluoride | 1mm - 2.5mm Pieces | 25 g | 99.99% | EVMMGF-1-2.5A |
| Magnesium Fluoride | 1mm - 2.5mm Pieces | 50 g | 99.99% | EVMMGF-1-2.5B |
| Magnesium Fluoride | 1mm - 2.5mm Pieces | 500 g | 99.99% | EVMMGF-1-2.5T |
| Magnesium Fluoride | 1mm - 4mm Pieces | 500 g | 99.995-99.999% | EVMMGF501-4T |
| Magnesium Fluoride | 3mm - 6mm Pieces | 50 g | 99.9% | EVMMGF-1113B |
| Magnesium Fluoride | 3mm - 6mm Pieces | 100 g | 99.9% | EVMMGF-1113D |
| Magnesium Fluoride | 3mm - 6mm Pieces | 500 g | 99.9% | EVMMGF-1113T |
| Magnesium Fluoride | 3mm - 6mm Pieces | 1 kg | 99.9% | EVMMGF1113KG |
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