GeO2 Base Glasses: G100a

About Property Data Summaries.

Reference: NBS Technical Note 1212

Other materials: Germanate Glasses

Material Summary:

Molar composition: 100% GeO2

Property Summary:

Property                           Value  Environment  Notes
---------------------------------  -----  -----------  --------------------------------------
Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 26.5   Air          Young's modulus is extrapolated.
Fracture Energy [J/m2]  ..........:  8.47  Air          Notched beam
Fracture Toughness [MPa m1/2].....:  0.67  Air          Notched beam

Crack Growth Exponent []   .......:
Elastic Modulus [GPa]   ..........: 46.5   N2 gas     
Fracture Energy [J/m2]  ..........:  3.8   N2 gas     Notched beam,crosshead speed
= 4.3 µm/s
Fracture Toughness [MPa m1/2].....:  0.61  N2 gas     Notched beam,crosshead speed = 4.3
µm/s


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Date created: 08 February 2001
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