B2O3 Base Glasses: B66a

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Borate Glasses

Material Summary:

Molar composition: 66% B2O3 + 34% Na2O

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 28.0   Air          Young's modulus is extrapolated. 
Fracture Energy [J/m2]  ..........:  7.55  Air          Notched beam 
Fracture Toughness [MPa m1/2].....:  0.65  Air          Notched beam

Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 26.0   Air          Young's modulus is extrapolated. 
Fracture Energy [J/m2]  ..........:  9.42  Air          Double torsion
Fracture Toughness [MPa m1/2].....:  0.7   Air          Double torsion


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Date created: 08 February 2001
Last updated: 08 February 2001

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