GeO2 Base Glasses: G90c

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Germanate Glasses

Material Summary:

Molar composition: 90% GeO2 + 10% Na2O

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......: 
Elastic Modulus [GPa]   ..........: 61.2   N2 gas      
Fracture Energy [J/m2]  ..........:  6.6   N2 gas     Notched beam,precracked
samples,
                                                       crosshead speed 4.3 µm/s,dew point 50 °C
Fracture Toughness [MPa m1/2].....:  0.93  N2 gas     Notched beam,precracked samples,
                                                       crosshead speed 4.3 µm/s,dew point 50 °C

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 52.0   Air          Young's modulus is extrapolated.  
Fracture Energy [J/m2]  ..........: 17.27  Air          Notched beam 
Fracture Toughness [MPa m1/2].....:  1.34  Air          Notched beam


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

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