Potassium Bromide Window (KBr) Description
Potassium Bromide Window (KBr) is a spectroscopy accessory commonly used in infrared (IR) spectroscopy. It is a transparent optical element made from the compound potassium bromide (KBr).
Potassium Bromide Window (KBr) Specifications
Material
|
KBr
|
Abbe Number (vd)
|
33.64
|
Clear Aperture (%)
|
85
|
Coefficient of Thermal Expansion CTE (10-6/℃)
|
43
|
Edges
|
Fine Ground
|
Knoop Hardness (kg/mm2)
|
7
|
Poisson's Ratio
|
0.203
|
Surface Quality
|
60-40
|
Young's Modulus (GPa)
|
26.8
|
Density (g/cm3)
|
2.753
|
Index of Refraction nd
|
1.56
|
Parallelism (arcmin)
|
<3
|
Surface Flatness (P-V)
|
λ/10 @ 10.6μm
|
Wavelength Range (nm)
|
250-26000
|
Potassium Bromide Window (KBr) Application
Potassium Bromide Window (KBr) is widely used in spectroscopic prisms, transmission windows and lenses of Fourier transform infrared spectrometers, infrared spectrophotometers and infrared devices.
Potassium Bromide Window (KBr) Packaging
Our Potassium Bromide Window (KBr) is carefully handled during storage and transportation to preserve the quality of our product in its original condition.
FAQs
Q1: What are the key properties of Potassium Bromide (KBr) Windows?
High Transparency: KBr windows offer high transmission in the IR spectrum, particularly in the range of 4000 cm⁻¹ to 400 cm⁻¹ (2.5 to 25 µm wavelength).
Low Absorption: They exhibit low absorption of infrared light, making them ideal for IR spectroscopy.
Brittleness: Potassium Bromide is relatively brittle and requires careful handling.
Hygroscopic: KBr crystals are sensitive to moisture and must be protected from water exposure.
Q2: What are the main applications of Potassium Bromide (KBr) Windows?
- Infrared Spectroscopy: Used in IR spectrometers as optical windows or beamsplitters, allowing IR light to pass through with minimal absorption.
- Chemical Analysis: Commonly used in laboratory setups for analyzing chemical compounds via their IR spectra.
- Laser Systems: Used in laser systems that operate in the IR range.
- Optical Instruments: Utilized in various optical instruments where high transparency in the IR range is essential.
Q3: How do I clean Potassium Bromide (KBr) Windows?
Potassium Bromide windows should be cleaned with care due to their sensitivity. It's recommended to use soft, lint-free wipes and a mild solvent such as isopropyl alcohol or ethanol. Avoid using abrasive materials or harsh chemicals. Keep the windows dry and protected from moisture.