Borate Glasses pp 297-306 | Cite as

Infrared Spectra and Structure of CVD B2O3-SiO2 Glasses

  • Joe Wong
Part of the Materials Science Research book series (MSR, volume 12)


Glassy solids are commonly formed by continuous cooling from the liquid state. The procedure consists of quenching a normal liquid into the supercooled liquid range at such a rate so as to bypass its equilibrium crystallization point. Finally, at Tg, the glass transition temperature, the system falls out of its internal equilibrium. The supercooled liquid now transforms to a glass, carrying with it the structural configuration at Tg. However, the essential requirement for glass formation is that the thermal energy of an ensemble of particles, whether molecules, ions, atoms, etc. can be removed at a rate which for kinetic reasons, precludes the organization of these particles into a crystal lattice. For this purpose an initially liquid state of the glassy system is by no means necessary. In fact a more efficient procedure for removing the molecular thermal energy is to deposit the molecules sequentially from a vapor onto a cold substrate (cold with respect to Tg of the deposited material).


Reference Beam Glass Film Cold Substrate Increase Heat Treatment Temperature High Temperature Liquid 
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Copyright information

© Plenum Press, New York 1978

Authors and Affiliations

  • Joe Wong
    • 1
  1. 1.General Electric Corporate Research and DevelopmentSchenectadyUSA

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