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  • 1995-1999  (2)
  • 1985-1989
  • 1998  (2)
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  • 1995-1999  (2)
  • 1985-1989
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  • 1
    Electronic Resource
    Electronic Resource
    Light-scattering study of the glass transition in silica, with practical implications (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 3107-3112 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The glass transition in silica glass was investigated by light-scattering measurements, and relations between the glass transition temperature, fictive temperature, cooling rate, and viscosity in silica glass were clarified. Furthermore, the effect of OH ions on the structural relaxation was found to work in two ways: The OH ions reduce the activation energy of viscoelastic relaxation, and they also generate a new relaxation due to local structure change. Application of such a relaxational process due to impurities should be effective for controlling the performances of silica glass. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368465
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural relaxation enhanced by Cl ions in silica glass (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 1209-1211 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of Cl ions on the structural relaxation in silica glass was investigated by observing the fictive temperature, which was determined from the position of infrared absorption peak around 2260 cm−1 related to the average Si–O–Si bond angle. It has been found that Cl ions reduce the relaxation time of the long-range cooperative relaxation due to viscous flow, the so-called α relaxation. Moreover, Cl ions reduce the relaxation time of a subrelaxational process, caused by local structural relaxation. Although Cl has been used in industry only for dehydrating silica glass for optical fibers, these structural relaxation enhanced by Cl may be used advantageously to develop ultralow-loss fiber glass. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.122129
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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