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Schott N-KZFS4HT 613445.300, Optical Glass
Categories: Ceramic; Glass; Optical

Material Notes:

Information provided by SCHOTT.

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Physical PropertiesOriginal ValueComments
Density 3.00 g/cc
 
Chemical PropertiesOriginal ValueComments
Acid Class, SR 3.4
Alkali Class, AR 1.2
Stain Resistance Class, FR 1.0
 
Mechanical PropertiesOriginal ValueComments
Hardness, Knoop 520HK (0.1/20)
Modulus of Elasticity 78.0 GPa
Poissons Ratio 0.241
Shear Modulus 31.4 GPaCalculated
 
Thermal PropertiesOriginal ValueComments
CTE, linear 7.30 µm/m-°C
@Temperature -30.0 - 70.0 °C
 8.20 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.760 J/g-°C
Thermal Conductivity 0.840 W/m-K
Transformation Temperature, Tg 536 °C
Softening Point 664 °Cviscosity of 107.6 cP
Annealing Point 541 °Cviscosity of 1013 cP
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.575
@Wavelength 2323.4 nm
 1.582
@Wavelength 1970.1 nm
 1.589
@Wavelength 1529.6 nm
 1.597
@Wavelength 1060 nm
 1.598
@Wavelength 1014 nm
 1.601
@Wavelength 852.1 nm
 1.606
@Wavelength 706.5 nm
 1.609
@Wavelength 643.8 nm
 1.609
@Wavelength 656.3 nm
 1.61
@Wavelength 632.8 nm
 1.613
@Wavelength 587.6 nm
 1.613
@Wavelength 589.3 nm
 1.616
@Wavelength 546.1 nm
 1.623
@Wavelength 480 nm
 1.623
@Wavelength 486.1 nm
 1.63
@Wavelength 435.8 nm
 1.637
@Wavelength 404.7 nm
 1.648
@Wavelength 365 nm
Abbe Number 44.27ve
 44.49vd
Optical Dispersion 0.013785nf - nc
 0.013929nf' - nc'
Transmission, Visible 97.1 %
@Thickness 25.0 mm,
Wavelength 420 nm
 97.5 %
@Thickness 25.0 mm,
Wavelength 436 nm
 98 %
@Thickness 25.0 mm,
Wavelength 460 nm
 98.8 %
@Thickness 10.0 mm,
Wavelength 420 nm
 98.8 %
@Thickness 25.0 mm,
Wavelength 500 nm
 99 %
@Thickness 10.0 mm,
Wavelength 436 nm
 99.2 %
@Thickness 10.0 mm,
Wavelength 460 nm
 99.2 %
@Thickness 25.0 mm,
Wavelength 620 nm
 99.3 %
@Thickness 25.0 mm,
Wavelength 660 nm
 99.3 %
@Thickness 25.0 mm,
Wavelength 580 nm
 99.3 %
@Thickness 25.0 mm,
Wavelength 546 nm
 99.4 %
@Thickness 25.0 mm,
Wavelength 700 nm
 99.5 %
@Thickness 10.0 mm,
Wavelength 500 nm
 99.7 %
@Thickness 10.0 mm,
Wavelength 580 nm
 99.7 %
@Thickness 10.0 mm,
Wavelength 546 nm
 99.7 %
@Thickness 10.0 mm,
Wavelength 660 nm
 99.7 %
@Thickness 10.0 mm,
Wavelength 620 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 700 nm
IR Transmittance 18.6 %
@Thickness 25.0 mm,
Wavelength 2500 nm
 48.6 %
@Thickness 25.0 mm,
Wavelength 2325 nm
 51 %
@Thickness 10.0 mm,
Wavelength 2500 nm
 74.9 %
@Thickness 10.0 mm,
Wavelength 2325 nm
 88.1 %
@Thickness 25.0 mm,
Wavelength 1970 nm
 95.1 %
@Thickness 10.0 mm,
Wavelength 1970 nm
 96.1 %
@Thickness 25.0 mm,
Wavelength 1530 nm
 98.4 %
@Thickness 10.0 mm,
Wavelength 1530 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 1060 nm
 99.9 %
@Thickness 25.0 mm,
Wavelength 1060 nm
UV Transmittance 0.20 %
@Thickness 25.0 mm,
Wavelength 320 nm
 6.0 %
@Thickness 10.0 mm,
Wavelength 320 nm
 22.3 %
@Thickness 25.0 mm,
Wavelength 334 nm
 54.9 %
@Thickness 10.0 mm,
Wavelength 334 nm
 70 %
@Thickness 25.0 mm,
Wavelength 350 nm
 86.7 %
@Thickness 10.0 mm,
Wavelength 350 nm
 87.4 %
@Thickness 25.0 mm,
Wavelength 365 nm
 90.1 %
@Thickness 25.0 mm,
Wavelength 370 nm
 93.4 %
@Thickness 25.0 mm,
Wavelength 380 nm
 94.8 %
@Thickness 10.0 mm,
Wavelength 365 nm
 95.1 %
@Thickness 25.0 mm,
Wavelength 390 nm
 95.9 %
@Thickness 10.0 mm,
Wavelength 370 nm
 96.2 %
@Thickness 25.0 mm,
Wavelength 400 nm
 96.6 %
@Thickness 25.0 mm,
Wavelength 405 nm
 97.3 %
@Thickness 10.0 mm,
Wavelength 380 nm
 98 %
@Thickness 10.0 mm,
Wavelength 390 nm
 98.5 %
@Thickness 10.0 mm,
Wavelength 400 nm
 98.6 %
@Thickness 10.0 mm,
Wavelength 405 nm
 
Descriptive Properties
Acid resistance class6according to JOGIS
Climatic resistance1
Grindability130according to JOGIS
 3
Phosphate resistance1
Stress optical coefficient3.9[10-6mm2/N]
Water resistance class4according to JOGIS
Yield point/sag temperature597°C

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