Mateck Glass (BK7 analogous)

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Mateck Glass (BK7 analogous)
Categories:	Ceramic; Glass; Glass Ceramic
Material Notes:	Optical crystals
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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	1.50731 @Wavelength 1014 nm	1.50731 @Wavelength 1014 nm
	1.51872 @Wavelength 546.1 nm	1.51872 @Wavelength 546.1 nm	at ne
	1.52283 @Wavelength 480 nm	1.52283 @Wavelength 480 nm	at nf'
	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
Thermal Coefficient of Refractive Index	2.8E-06		0.546 microns for ± 20°C
Transmission Range (microns)	0.35 - 2

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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CMAT044 / 87728

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