B2O3 Base Glasses: B70c

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Borate Glasses

Material Summary:

Molar composition: 70% B2O3 + 22.5% PbO + 7.5% ZnO

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 64.0   N2 liquid   
Fracture Energy [J/m2]  ..........: 11.82  N2 liquid  Controlled flaw 
Fracture Toughness [MPa m1/2].....:  1.23  N2 liquid  Controlled flaw

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 64.0   Air                             
Fracture Energy [J/m2]  ..........:  4.61  Air          Controlled flaw 
Fracture Toughness [MPa m1/2].....:  0.77  Air          Controlled flaw


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

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