Molecular Network Reinforcement of Sol-Gel Glasses

Mechanical properties of organic/ inorganic thin‐films prepared from bridged silicon precursors have been investigated. The Young's modulus follows a linear decay when porosity is introduced, a unique observation as compared to traditional organosilicates. Remarkably, in the dense state, fractu...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2007-11, Vol.19 (22), p.3989-3994
Main Authors: Dubois, G., Volksen, W., Magbitang, T., Miller, R. D., Gage, D. M., Dauskardt, R. H.
Format: Article
Language:English
Subjects:
Glasses
Sol-gels
Structure-property relationships
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Summary:Mechanical properties of organic/ inorganic thin‐films prepared from bridged silicon precursors have been investigated. The Young's modulus follows a linear decay when porosity is introduced, a unique observation as compared to traditional organosilicates. Remarkably, in the dense state, fracture energies of 15–17 J.m–2 were measured, values that are larger than those for dense SiO2 (10 J.m–2), dispelling the common belief that all organosilicates are fragile and prone to fracture.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.200701193