Songhan Plastic Technology Co.,Ltd.
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Mateck Glass (BK7 Schott or analogous)

Category Ceramic , Glass , Glass Ceramic
Manufacturer Mateck GmbH
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Optical crystals
Physical Properties Metric English Comments
Density 2.51 g/cc
0.0907 lb/in³
Mechanical Properties Metric English Comments
Modulus of Elasticity 81.0 GPa
11700 ksi
Poissons Ratio 0.206
0.206
Shear Modulus 33.6 GPa
4870 ksi
Calculated
Thermal Properties Metric English Comments
CTE, linear 7.10 µm/m-°C

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

@Temperature -22.0 - 158 °F
Specific Heat Capacity 0.858 J/g-°C
0.205 BTU/lb-°F
Thermal Conductivity 1.114 W/m-K
7.731 BTU-in/hr-ft²-°F
Melting Point 559 °C
1040 °F
Optical Properties Metric English Comments
Refractive Index 1.51872
1.51872
at ne
1.52283
1.52283
at nf'
1.50731

@Wavelength 1014 nm
 1.50731

@Wavelength 1014 nm
1.53626

@Wavelength 365 nm
 1.53626

@Wavelength 365 nm
IR Transmittance 75 %

@Wavelength 2300 nm
 75 %

@Wavelength 2300 nm
 Internal Transmittance
90 %

@Wavelength 2000 nm
 90 %

@Wavelength 2000 nm
 Internal Transmittance
UV Transmittance 8.0 %

@Wavelength 300 nm
 8.0 %

@Wavelength 300 nm
 Internal Transmittance
92 %

@Wavelength 350 nm
 92 %

@Wavelength 350 nm
 Internal Transmittance
Descriptive Properties Value Comments
Thermal Coefficient of Refractive Index 2.8E-06
0.546 microns for ± 20°C
Transmission Range (microns) 0.35 - 2
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