Visco-elastic relaxations in alkali borates and alkali silicates

J. Kieffer, J. E. Masnik, B. J. Reardon, Jay D Bass

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The Brillouin light scattering technique was used to study short time relaxations in glass forming oxide melts. The line shape analysis of Brillouin spectra yields a complex mechanical modulus. The temperature dependence of this modulus provides insight into the structural disintegration above the glass transition, as well as the thermally activated mechanisms which facilitate the momentum transport in the process of viscous dissipation. A series of binary and ternary alkali borates and alkali silicates have been investigated. The results show fundamental differences in the way alkali cations affect the network structure in borates as compared to silicates. While these cations move relatively freely within the rigid silicate network, their motions are strongly coupled to the network relaxation in borates. The activation energies for cation motion are in good agreement with those found by other methods.

Original languageEnglish (US)
Title of host publicationCrystallization and Related Phenomena in Amorphous Materials
EditorsMatthew Libera, Tony E. Haynes, Peggy Cebe, James E. Dickinson Jr.
PublisherPubl by Materials Research Society
Number of pages6
ISBN (Print)1558992200
StatePublished - 1994
EventProceedings of the 1993 Fall Meeting of the Materials Research Society - Boston, MA, USA
Duration: Nov 29 1993Dec 3 1993


OtherProceedings of the 1993 Fall Meeting of the Materials Research Society
CityBoston, MA, USA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials


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