Potassium Bromide (KBr) Optical Crystal, <110>, Double-side polish, 20 x 20 mmProduct Type: Infrared optical crystal
Research-grade laboratory product
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LABORATORY PROCUREMENT SUPPORT
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E-MAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This potassium bromide optical crystal is water-soluble and highly moisture-sensitive, requiring strict humidity control during storage and handling. Chemical polishing is contraindicated due to the material's solubility, and all processing must be performed in a cleanroom environment to preserve surface quality.
- Moisture Sensitivity: Store the crystal in a desiccated environment below 30% relative humidity to prevent surface degradation.
- Polishing Restriction: Do not use chemical polishing methods; only mechanical polishing with non-aqueous lubricants is acceptable.
- Cleanroom Handling: Handle and package the crystal in a Class 1000 or cleaner environment using Class 100 clean bags to avoid particulate contamination.
- Orientation Tolerance: Confirm the <110> orientation within ±0.5–2° tolerance before any cutting or polishing operations.
- Substrate Processing: When used as a water-soluble substrate for film separation, dissolve the crystal in deionized water after film deposition.
What are the key performance trade-offs of using a <110>-oriented KBr crystal for mid-infrared spectroscopy compared to other orientations?
The <110> orientation provides a specific crystallographic plane that can influence birefringence and mechanical stability for optical components. This product offers a broad transmission range of 0.2–27.5 μm with 91% transmission and a refractive index of 1.49, but the orientation tolerance is ±0.5–2°, which may affect phase-matching or polarization-dependent applications. The double-side polish and surface roughness ≤30 nm ensure low scatter, but the water-soluble nature limits handling and cleaning options.
Can this KBr crystal be integrated into a vacuum or dry-gas purged FTIR system without additional protective coatings?
Yes, but with critical constraints. KBr is highly moisture-sensitive and water-soluble, so it requires a dry environment or purge gas to prevent surface degradation. The crystal is packaged in a Class 100 clean bag and handled in a Class 1000 or cleaner room, but no protective anti-humidity coating is specified. For long-term use in FTIR systems, a dry nitrogen purge or desiccated sample compartment is recommended to maintain the 91% transmission and low impurity absorption.
What are the handling and storage requirements for this water-soluble KBr optical crystal to avoid damage?
This KBr crystal is water-soluble and moisture sensitive, so it must be stored in a low-humidity environment, typically below 40% relative humidity, and handled with gloves to avoid contamination from skin oils. Chemical polishing is not recommended; only gentle cleaning with anhydrous solvents or dry gas should be used. The crystal is supplied in a Class 100 clean bag and should be kept in a desiccator when not in use to prevent surface etching or fogging that would degrade the ≤30 nm surface roughness.
This KBr optical crystal with <110> orientation, double-side polish, and 20×20 mm format offers broad transmission from UV to mid-IR (0.2–27.5 μm) and high transmission (91%) with low impurity absorption, making it suitable for infrared spectroscopy and water-soluble thin-film substrate applications. However, its water solubility and moisture sensitivity require careful handling and storage in dry environments, and chemical polishing is not recommended for surface rework.
Positive
- Broad UV-to-Mid-IR Transmission: Transmission range of 0.2–27.5 μm covers ultraviolet to mid-infrared, enabling versatile use in spectroscopy, optics, and laser windows.
- High Transmission with Low Impurity Absorption: 91% transmission and low impurity absorption minimize signal loss in optical applications, improving measurement sensitivity.
Trade-offs
- Water Solubility and Moisture Sensitivity: KBr is water-soluble and moisture-sensitive; exposure to humid environments can degrade surface quality, requiring storage in dry conditions and handling with care.
- Chemical Polishing Not Recommended: The manufacturer advises against chemical polishing due to solubility, limiting surface rework options and necessitating careful initial finishing.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
