20mm Dia x 2mm Thickness Uncoated, Potassium Bromide Window

Product Details Excellent Transmission from 250nm – 26μm Good Resistance to Mechanical Shock Ideal for FTIR Spectroscopy Sodium Chloride (NaCl) Windows Also Available Potassium Bromide (KBr) Windows are ideal for FTIR spectroscopy. KBr has a slightly more extensive spectral range than Sodium Chloride (NaCl) and has excellent transmission from 250nm – 26μm. Its index of refraction varies from 1.46 – 1.59 over this range. KBr is water soluble, and its surfaces should be protected from exposure to moisture. Exposure to moisture will degrade the surface of the window. Potassium Bromide (KBr) Windows provide good resistance to mechanical shock, can be easily cleaved, and can be used in temperatures up to 300°C. KBr has a density of 2.75g/cm3 and a Knoop Hardness of 7.0. Specifications General Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Diameter (mm): 20.00 ±0.50 Thickness (mm): 2.00 ±0.50 Dimensional Tolerance (mm): ±0.50 Bevel: Protective as needed Edges: Fine Ground Poisson’s Ratio: 0.20 Young’s Modulus (GPa): 26.8 Knoop Hardness (kg/mm 2 ): 7.00 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Potassium Bromide (KBr) Index of Refraction (n d ): 1.56 Surface Quality: 60-40 Abbe Number (v d ): 33.64 Wavelength Range (nm): 250 – 26000 Material Properties Density (g/cm 3 ): 2.753 Coefficient of Thermal Expansion CTE (10 -6 /°C): 43 Solubility, in 100g of H 2 O @ 273K (g): 53.48 Regulatory Compliance RoHS 2015: Compliant × Reach 219: Compliant × Certificate of Conformance: View ×