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Master Bond adhesives

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Mateck Potassium Bromide (KBr)
Categories: Ceramic; Halide

Material Notes: Optical crystals

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Physical PropertiesOriginal ValueComments
Density 2.75 g/cc
Solubility 53.48 ppm
a Lattice Constant 6.598 Å
c Lattice Constant 6.598 Å
Molecular Weight 119.01 g/mol
 
Mechanical PropertiesOriginal ValueComments
Vickers Microhardness 100MPa
Hardness, Mohs 1.5
Modulus of Elasticity 13.8 GPain <110> direction
 33.0 GPain <100> direction
Poissons Ratio 0.138
Shear Modulus 5.10 GPain <110> direction
 9.00 GPain <100> direction
 
Thermal PropertiesOriginal ValueComments
CTE, linear 36.6 - 39.6 µm/m-°C
@Temperature -60.0 - 60.0 °C
Specific Heat Capacity 0.4522 J/g-°C
Thermal Conductivity 4.81 W/m-K
@Temperature 46.0 °C
Melting Point 728 °C
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.5251n10.6
 1.4253
@Wavelength 30000 nm
 1.5319
@Wavelength 6000 nm
 1.5639
@Wavelength 546.1 nm
at ne
 1.57
@Wavelength 500 nm
 2.0995
@Wavelength 200 nm
Transmission, Visible 98 %
@Wavelength 500 nm
Internal Transmittance
IR Transmittance 26 %
@Wavelength 30000 nm
Internal Transmittance
 98 %
@Wavelength 15000 nm
Internal Transmittance
UV Transmittance 48 %
@Wavelength 200 nm
Internal Transmittance
 
Descriptive Properties
Cleavability(100)perfect
Constants of Elastic Compliance (Pa^-1)1.9492E-10S44
 3.029E-11S11
 -4.18E-12S12
Symmetrycubic
Symmetry Classm3m
Thermal Coefficient of Refractive Index-3.95E-5 to -4.29E-5at 3.39 microns for ± 60°C
Transmission Range (microns)0.21 - 28

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