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Schott N-LAK21 Glass

Category Ceramic , Glass
Manufacturer Schott North America
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Schott N-LAK21 Glass.pdf
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Material Notes:
Information Provided by SCHOTT North America, Inc.
Physical Properties Metric English Comments
Density 3.74 g/cc
0.135 lb/in³
Mechanical Properties Metric English Comments
Knoop Microhardness 600
600
.1/20
Modulus of Elasticity 91.0 GPa
13200 ksi
Poissons Ratio 0.272
0.272
Shear Modulus 36.0 GPa
5220 ksi
calculated
Thermal Properties Metric English Comments
CTE, linear 6.80 µm/m-°C

@Temperature -30.0 - 70.0 °C
 3.78 µin/in-°F

@Temperature -22.0 - 158 °F
8.10 µm/m-°C

@Temperature 20.0 - 300 °C
 4.50 µin/in-°F

@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.590 J/g-°C
0.141 BTU/lb-°F
Thermal Conductivity 0.880 W/m-K
6.11 BTU-in/hr-ft²-°F
Transformation Temperature, Tg 639 °C
1180 °F
Optical Properties Metric English Comments
Refractive Index 1.64049

@Wavelength 587.6 nm
 1.64049

@Wavelength 587.6 nm
 n<sub>d</sub>
1.64304

@Wavelength 546.1 nm
 1.64304

@Wavelength 546.1 nm
 n<sub>e</sub>
Transmission, Visible 95.9 %

@Thickness 10.0 mm,
Wavelength 380 nm
 95.9 %

@Thickness 0.394 in,
Wavelength 380 nm
98.2 %

@Thickness 10.0 mm,
Wavelength 405 nm
 98.2 %

@Thickness 0.394 in,
Wavelength 405 nm
99 %

@Thickness 10.0 mm,
Wavelength 460 nm
 99 %

@Thickness 0.394 in,
Wavelength 460 nm
99.7 %

@Thickness 10.0 mm,
Wavelength 580 nm
 99.7 %

@Thickness 0.394 in,
Wavelength 580 nm
99.8 %

@Thickness 10.0 mm,
Wavelength 700 nm
 99.8 %

@Thickness 0.394 in,
Wavelength 700 nm
IR Transmittance 53.6 %

@Thickness 10.0 mm,
Wavelength 2500 nm
 53.6 %

@Thickness 0.394 in,
Wavelength 2500 nm
98.8 %

@Thickness 10.0 mm,
Wavelength 1530 nm
 98.8 %

@Thickness 0.394 in,
Wavelength 1530 nm
UV Transmittance 6.0 %

@Thickness 10.0 mm,
Wavelength 310 nm
 6.0 %

@Thickness 0.394 in,
Wavelength 310 nm
56.5 %

@Thickness 10.0 mm,
Wavelength 334 nm
 56.5 %

@Thickness 0.394 in,
Wavelength 334 nm
92.8 %

@Thickness 10.0 mm,
Wavelength 370 nm
 92.8 %

@Thickness 0.394 in,
Wavelength 370 nm
Chemical Properties Metric English Comments
Acid Class, SR 53.2
53.2
Alkali Class, AR 4.3
4.3
Stain Resistance Class, FR 2.0
2.0
Descriptive Properties Value Comments
B 0
Climatic Resistance Test CR 4
HG 5
K (10-6mm2/N) 1.74
Phosphate Resistance PR 4.3
T1013.0 (°C) 627
T107.6 (°C) 716
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