Yttrium Fluoride (YF₃) – High Purity Rare Earth Fluoride for Optical Coating & Laser Materials
Product Overview
Yttrium Fluoride , also known as Yttrium Trifluoride, is a high-performance anhydrous rare earth fluoride compound with the chemical formula YF₃. It is a white inorganic crystalline powder featuring ultra-wide spectral transmittance, low refractive index, excellent thermal stability and superior chemical inertness. Different from oxide and chloride rare earth materials, Yttrium Fluoride boasts minimal optical loss, outstanding plasma resistance and high vacuum stability, making it a core functional material for optical coating, laser crystal manufacturing, semiconductor processing and high-temperature resistant ceramics. As a professional rare earth fluoride product, it is widely supplied for high-end optoelectronic and precision industrial fields worldwide.
Basic Product Information
CAS Number : 13709-49-4
Molecular Formula: YF₃
Molecular Weight: 145.90
Appearance: White odorless crystalline powder or granular solid
Purity Grades: 99%, 99.9%, 99.99% (4N), 99.999% (5N) ultra-high purity
Density: 4.01 g/cm³
Melting Point: 1387°C
Boiling Point: 2230°C
Solubility: Insoluble in water and most organic solvents, slightly soluble in strong mineral acids
Core Features: Broadband UV-IR transmittance, low refractive index, high thermal stability, corrosion resistance, low vapor pressure under vacuum
Production Features
Our high-purity Yttrium Fluoride is produced via advanced fluorination synthesis, high-temperature purification and vacuum drying processes. The product features uniform particle size distribution, complete crystal structure, ultra-low trace metal and rare earth impurities, and stable batch consistency. Strict quality control is implemented throughout production to eliminate lattice defects and impurity residues, ensuring low optical loss and high coating uniformity, fully meeting the strict material standards of vacuum coating, laser device manufacturing and semiconductor precision processing.
Core Physical and Chemical Properties
Optical Properties
Yttrium Fluoride possesses industry-leading broadband optical transmittance, with a transparent spectral range covering 193 nm ultraviolet to 14 μm infrared band. It has a stable low refractive index (1.50–1.51 at 550 nm visible light), extremely low optical absorption and scattering loss, and will not produce chromatic aberration or light attenuation during long-term service. Compared with traditional optical coating materials, YF₃ features better spectral stability and anti-aging performance, which can effectively improve the transmittance, reflectivity and service life of optical thin-film devices.
Thermal and Chemical Properties
This rare earth fluoride has excellent high-temperature structural stability and ultra-low vacuum vapor pressure. It does not decompose, volatilize or deteriorate under high temperature and high vacuum environments, adapting to harsh vacuum coating and high-temperature processing conditions. Chemically, Yttrium Fluoride shows strong inertness and corrosion resistance, resisting erosion from most acids, alkalis and corrosive gases. It also has excellent plasma radiation resistance, which can maintain stable physical and chemical structures in semiconductor etching and plasma processing environments, with extremely low material ablation rate.
Main Industrial Applications
Application Scope
High-purity Yttrium Fluoride is an irreplaceable core material in high-end optoelectronics, semiconductor manufacturing and advanced ceramic industries. Its precise and high-performance application scenarios are as follows:
1. Optical Coating & Thin-Film Materials
YF₃ is one of the most widely used low-refractive-index coating materials. It is commonly applied in vacuum evaporation coating for optical lenses, optical windows, filters and laser protective films. It can be combined with high-refractive-index materials to prepare high-transmittance anti-reflection coatings, high-reflection films and broadband optical thin films, effectively improving optical device accuracy, light transmission efficiency and environmental adaptability.
2. Laser Crystal & Optoelectronic Devices
It serves as a key raw material for manufacturing YLF (Yttrium Lithium Fluoride) laser crystals and various rare earth doped laser gain media. The high-purity Yttrium Fluoride matrix features low lattice defects and high energy transfer efficiency, which significantly improves the output stability and service life of solid-state lasers, medical laser instruments and industrial precision laser equipment.
3. Semiconductor & Vacuum Electronic Materials
Benefiting from excellent plasma resistance and ultra-high purity, Yttrium Fluoride is widely used in semiconductor wafer processing, plasma etching equipment accessories and vacuum electronic device manufacturing. It can be prepared into high-stability protective coatings and insulating layers, reducing equipment loss and improving the yield and processing precision of semiconductor chips.
4. High-Temperature Resistant & Functional Ceramics
As a high-performance ceramic additive and sintering aid, YF₃ can optimize the sintering activity of ceramic materials, improve compactness, high-temperature toughness and thermal shock resistance. It is widely used in high-temperature structural ceramics, aerospace thermal barrier coatings and special corrosion-resistant ceramic components, effectively enhancing the high-temperature service stability of composite materials.
5. Rare Earth Metal & Special Alloy Preparation
Yttrium Fluoride is the key precursor for electrolytic preparation of high-purity metallic yttrium. It features stable electrolytic reaction and high product purity, which can effectively avoid oxide impurity interference. Meanwhile, it is used as a modifier for high-temperature alloys and aerospace alloys to refine grain structure and improve alloy high-temperature oxidation resistance and mechanical strength.
Technical Reference Data
All below parameters are tested under standard laboratory environment (25°C, 1 standard atmospheric pressure), providing accurate data support for product selection, formula design and industrial production verification:
- Refractive Index : 1.50–1.51 (@550 nm)
- Spectral Transmittance Range : 193 nm – 14 μm (UV to IR)
- Evaporation Temperature : ≈1100°C (vacuum condition)
- Vacuum Vapor Pressure : Ultra-low at high temperature
- Bulk Density : 1.8–2.3 g/cm³
- D50 Particle Size : 2–10 μm (customizable powder & granule)
- Loss on Ignition (LOI) : ≤0.1%
- Moisture Content : ≤0.05%
- Total Rare Earth Purity : 99.9%–99.999%
Product Advantages
- Ultra-High Optical Performance : Broadband UV-IR transmittance, stable low refractive index, almost no optical loss, suitable for high-precision optical coating.
- Extreme Environmental Stability : High temperature resistance, vacuum stability, plasma corrosion resistance, adaptable to harsh industrial processing environments.
- Super High Purity & Low Defect : Strictly controlled trace impurities and rare earth heterologous impurities, complete crystal morphology, low lattice defects.
- Stable Batch Consistency : Uniform particle size, good fluidity, no agglomeration, stable physical and chemical properties in long-term batch supply.
- Diversified Customization : Support customized purity, particle size, powder and granule morphology, with complete technical support and global after-sales service.
Packaging & Storage Instructions
Standard Packaging : Vacuum moisture-proof aluminum foil bag (1kg/bag), sealed anti-pressure iron drum (25kg/drum); customized packaging specifications are supported.
Storage Conditions: Store in dry, cool, ventilated and dust-free indoor warehouse. Keep tightly sealed to prevent moisture absorption and dust contamination. Avoid long-term exposure to humid air and corrosive gases. Keep away from strong acids and oxidants to ensure long-term product stability.
Conclusion
Product Summary
Yttrium Fluoride (YF₃) is a high-value and irreplaceable rare earth fluoride functional material. With its unique broadband optical transmittance, excellent vacuum thermal stability and strong plasma corrosion resistance, it occupies a core strategic position in optical thin-film coating, laser crystal manufacturing, semiconductor processing and high-temperature ceramic industries. We provide high-quality Yttrium Fluoride products with stable supply, reliable quality and competitive price, delivering standardized and customized rare earth material solutions for global industrial manufacturers and scientific research institutions.
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