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PRODUCT DATA of BK7
MaterialBK7
Safety Datasheetmsds BK7
Product Datasheetdatasheet_n-bk7
General InformationBorosilicates contain about 10% boric oxide, have good optical and mechanical characteristics, and are resistant to chemical and environmental damage
Product TypeAmorphous glass
Chemical CompositionBorosilicate
Name of ManufacturerSCHOTT AG
Hattenbergstrasse 10, 55122 Mainz, Germany
+49 (0)6131/66-1812
info.optics@schott.com
+49 (0)3641/2888-9047
www.schott.com/advanced_optics
EXPERIENCE IN PRACTICE
Development StatusCommercial Product
Equivalent DesignationsBK 7; BK-7
PHYSICAL PROPERTIES
Specific Gravity2.51
ELASTIC PROPERTIES
Tensile Modulus82 GPa
Poisson Ratio0.206
THERMAL PROPERTIES
Thermal Conductivity1.11 W/m.K
Thermal Expansion Coefficient7.1 μstrain/°C
Melting Range557 °C
Specific Heat0.858 J/g.K