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Specialty Compounds RTP Company

Schott N-BK7HTi 517642.251, Optical Glass
Categories: Ceramic; Glass; Optical
Material Notes:

Information provided by SCHOTT.
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 2.51 g/cc0.0907 lb/in³
 
Chemical PropertiesMetricEnglishComments
Acid Class, SR 1.01.0
Alkali Class, AR 2.32.3
Stain Resistance Class, FR 0.000.00
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 610610HK (0.1/20)
Modulus of Elasticity 82.0 GPa11900 ksi
Poissons Ratio 0.2060.206
Shear Modulus 34.0 GPa4930 ksiCalculated
 
Thermal PropertiesMetricEnglishComments
CTE, linear  7.10 µm/m-°C
@Temperature -30.0 - 70.0 °C		3.94 µin/in-°F
@Temperature -22.0 - 158 °F
 8.30 µm/m-°C
@Temperature 20.0 - 300 °C		4.61 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.858 J/g-°C0.205 BTU/lb-°F
Thermal Conductivity 1.114 W/m-K7.731 BTU-in/hr-ft²-°F
Transformation Temperature, Tg 557 °C1030 °F
Softening Point 719 °C1330 °Fviscosity of 107.6 cP
Annealing Point 557 °C1030 °Fviscosity of 1013 cP
 
Optical PropertiesMetricEnglishComments
Refractive Index  1.489
@Wavelength 2325.4 nm		1.489
@Wavelength 2325.4 nm
 1.494
@Wavelength 1970.1 nm		1.494
@Wavelength 1970.1 nm
 1.50
@Wavelength 1529.6 nm		1.50
@Wavelength 1529.6 nm
 1.506
@Wavelength 1060 nm		1.506
@Wavelength 1060 nm
 1.507
@Wavelength 1014 nm		1.507
@Wavelength 1014 nm
 1.509
@Wavelength 852.1 nm		1.509
@Wavelength 852.1 nm
 1.512
@Wavelength 706.5 nm		1.512
@Wavelength 706.5 nm
 1.514
@Wavelength 656.3 nm		1.514
@Wavelength 656.3 nm
 1.514
@Wavelength 643.8 nm		1.514
@Wavelength 643.8 nm
 1.515
@Wavelength 632.8 nm		1.515
@Wavelength 632.8 nm
 1.516
@Wavelength 587.6 nm		1.516
@Wavelength 587.6 nm
 1.516
@Wavelength 589.3 nm		1.516
@Wavelength 589.3 nm
 1.518
@Wavelength 546.1 nm		1.518
@Wavelength 546.1 nm
 1.522
@Wavelength 486.1 nm		1.522
@Wavelength 486.1 nm
 1.522
@Wavelength 480 nm		1.522
@Wavelength 480 nm
 1.526
@Wavelength 435.8 nm		1.526
@Wavelength 435.8 nm
 1.53
@Wavelength 404.7 nm		1.53
@Wavelength 404.7 nm
 1.536
@Wavelength 365 nm		1.536
@Wavelength 365 nm
 1.542
@Wavelength 334.1 nm		1.542
@Wavelength 334.1 nm
 1.548
@Wavelength 312.6 nm		1.548
@Wavelength 312.6 nm
Abbe Number 63.9663.96ve
 64.1764.17vd
Optical Dispersion 0.0080540.008054nf - nc
 0.008110.00811nf' - nc'
Transmission, Visible  99.6 %
@Thickness 25.0 mm,
Wavelength 420 nm		99.6 %
@Thickness 0.984 in,
Wavelength 420 nm
 99.6 %
@Thickness 25.0 mm,
Wavelength 436 nm		99.6 %
@Thickness 0.984 in,
Wavelength 436 nm
 99.6 %
@Thickness 25.0 mm,
Wavelength 460 nm		99.6 %
@Thickness 0.984 in,
Wavelength 460 nm
 99.7 %
@Thickness 25.0 mm,
Wavelength 620 nm		99.7 %
@Thickness 0.984 in,
Wavelength 620 nm
 99.7 %
@Thickness 25.0 mm,
Wavelength 660 nm		99.7 %
@Thickness 0.984 in,
Wavelength 660 nm
 99.7 %
@Thickness 25.0 mm,
Wavelength 500 nm		99.7 %
@Thickness 0.984 in,
Wavelength 500 nm
 99.8 %
@Thickness 25.0 mm,
Wavelength 546 nm		99.8 %
@Thickness 0.984 in,
Wavelength 546 nm
 99.8 %
@Thickness 25.0 mm,
Wavelength 700 nm		99.8 %
@Thickness 0.984 in,
Wavelength 700 nm
 99.8 %
@Thickness 25.0 mm,
Wavelength 580 nm		99.8 %
@Thickness 0.984 in,
Wavelength 580 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 460 nm		99.8 %
@Thickness 0.394 in,
Wavelength 460 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 436 nm		99.8 %
@Thickness 0.394 in,
Wavelength 436 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 420 nm		99.8 %
@Thickness 0.394 in,
Wavelength 420 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 620 nm		99.9 %
@Thickness 0.394 in,
Wavelength 620 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 580 nm		99.9 %
@Thickness 0.394 in,
Wavelength 580 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 700 nm		99.9 %
@Thickness 0.394 in,
Wavelength 700 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 660 nm		99.9 %
@Thickness 0.394 in,
Wavelength 660 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 546 nm		99.9 %
@Thickness 0.394 in,
Wavelength 546 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 500 nm		99.9 %
@Thickness 0.394 in,
Wavelength 500 nm
IR Transmittance  49 %
@Thickness 25.0 mm,
Wavelength 2500 nm		49 %
@Thickness 0.984 in,
Wavelength 2500 nm
 65.7 %
@Thickness 25.0 mm,
Wavelength 2325 nm		65.7 %
@Thickness 0.984 in,
Wavelength 2325 nm
 75.2 %
@Thickness 10.0 mm,
Wavelength 2500 nm		75.2 %
@Thickness 0.394 in,
Wavelength 2500 nm
 84.5 %
@Thickness 10.0 mm,
Wavelength 2325 nm		84.5 %
@Thickness 0.394 in,
Wavelength 2325 nm
 88.8 %
@Thickness 25.0 mm,
Wavelength 1970 nm		88.8 %
@Thickness 0.984 in,
Wavelength 1970 nm
 95.4 %
@Thickness 10.0 mm,
Wavelength 1970 nm		95.4 %
@Thickness 0.394 in,
Wavelength 1970 nm
 98.7 %
@Thickness 25.0 mm,
Wavelength 1530 nm		98.7 %
@Thickness 0.984 in,
Wavelength 1530 nm
 99.5 %
@Thickness 10.0 mm,
Wavelength 1530 nm		99.5 %
@Thickness 0.394 in,
Wavelength 1530 nm
 99.9 %
@Thickness 10.0 mm,
Wavelength 1060 nm		99.9 %
@Thickness 0.394 in,
Wavelength 1060 nm
 99.9 %
@Thickness 25.0 mm,
Wavelength 1060 nm		99.9 %
@Thickness 0.984 in,
Wavelength 1060 nm
UV Transmittance  2.3 %
@Thickness 25.0 mm,
Wavelength 300 nm		2.3 %
@Thickness 0.984 in,
Wavelength 300 nm
 4.0 %
@Thickness 10.0 mm,
Wavelength 290 nm		4.0 %
@Thickness 0.394 in,
Wavelength 290 nm
 22.1 %
@Thickness 10.0 mm,
Wavelength 300 nm		22.1 %
@Thickness 0.394 in,
Wavelength 300 nm
 24.2 %
@Thickness 25.0 mm,
Wavelength 310 nm		24.2 %
@Thickness 0.984 in,
Wavelength 310 nm
 56.7 %
@Thickness 10.0 mm,
Wavelength 310 nm		56.7 %
@Thickness 0.394 in,
Wavelength 310 nm
 60 %
@Thickness 25.0 mm,
Wavelength 320 nm		60 %
@Thickness 0.984 in,
Wavelength 320 nm
 81.5 %
@Thickness 10.0 mm,
Wavelength 320 nm		81.5 %
@Thickness 0.394 in,
Wavelength 320 nm
 87.5 %
@Thickness 25.0 mm,
Wavelength 334 nm		87.5 %
@Thickness 0.984 in,
Wavelength 334 nm
 94.8 %
@Thickness 10.0 mm,
Wavelength 334 nm		94.8 %
@Thickness 0.394 in,
Wavelength 334 nm
 96.4 %
@Thickness 25.0 mm,
Wavelength 350 nm		96.4 %
@Thickness 0.984 in,
Wavelength 350 nm
 98.5 %
@Thickness 10.0 mm,
Wavelength 350 nm		98.5 %
@Thickness 0.394 in,
Wavelength 350 nm
 98.5 %
@Thickness 25.0 mm,
Wavelength 365 nm		98.5 %
@Thickness 0.984 in,
Wavelength 365 nm
 98.9 %
@Thickness 25.0 mm,
Wavelength 370 nm		98.9 %
@Thickness 0.984 in,
Wavelength 370 nm
 99.2 %
@Thickness 25.0 mm,
Wavelength 380 nm		99.2 %
@Thickness 0.984 in,
Wavelength 380 nm
 99.4 %
@Thickness 25.0 mm,
Wavelength 390 nm		99.4 %
@Thickness 0.984 in,
Wavelength 390 nm
 99.4 %
@Thickness 10.0 mm,
Wavelength 365 nm		99.4 %
@Thickness 0.394 in,
Wavelength 365 nm
 99.6 %
@Thickness 10.0 mm,
Wavelength 370 nm		99.6 %
@Thickness 0.394 in,
Wavelength 370 nm
 99.6 %
@Thickness 25.0 mm,
Wavelength 405 nm		99.6 %
@Thickness 0.984 in,
Wavelength 405 nm
 99.6 %
@Thickness 25.0 mm,
Wavelength 400 nm		99.6 %
@Thickness 0.984 in,
Wavelength 400 nm
 99.7 %
@Thickness 10.0 mm,
Wavelength 380 nm		99.7 %
@Thickness 0.394 in,
Wavelength 380 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 400 nm		99.8 %
@Thickness 0.394 in,
Wavelength 400 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 390 nm		99.8 %
@Thickness 0.394 in,
Wavelength 390 nm
 99.8 %
@Thickness 10.0 mm,
Wavelength 405 nm		99.8 %
@Thickness 0.394 in,
Wavelength 405 nm
 
Descriptive Properties
Climatic resistance1
Grindability3ISO 12844
Phosphate resistance2.3
Stress optical coefficient2.77[10-6mm2/N]

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