SiO2 Base Glasses: S73b

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Silicate Glasses

Material Summary:

Molar composition: 73.3% SiO2 + 10.0% B2O3 + 0.227% CaO + 4.74% K2O + 10.3% Na2O + <1.0W% CeO + 0.833 BaO
Specific Material: BK-7
Manufacturer: Schott

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 
Fracture Energy [J/m2]  ..........:  
Fracture Toughness [MPa m1/2].....:  0.86  Vacuum       Double cantilever beam
                                    0.84  Vacuum       Notched beam


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Date created: 08 February 2001
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