B2O3 Base Glasses: B50f

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Borate Glasses

Material Summary:

Molar composition: 50% B2O3 + 37.5% PbO + 12.5% ZnO

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 71.3   N2 liquid   
Fracture Energy [J/m2]  ..........:  2.74  N2 liquid  Controlled flaw 
Fracture Toughness [MPa m1/2].....:  0.63  N2 liquid  Controlled flaw 

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 71.3   Air       
Fracture Energy [J/m2]  ..........:  1.48  Air          Controlled flaw
Fracture Toughness [MPa m1/2].....:  0.46  Air          Controlled flaw


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

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