Abstract
The complex permittivities of some extra dense flint glasses (EDF glasses) have been studied. The dielectric features of the samples are dominated by their PbO content. Both refractive indices and dielectric losses exhibit a close relation to the concentration of Pb ions. The latter are located either at sites of the network atoms or filling the potential minima interstitially. They can be identified by their different relaxation mechanisms. The dispersion in the submillimeter wave and FIR area is characterized by a very broad distribution of comparably sharp resonant states. “Thermal lens” — or hysteresis effects can be excluded.
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Esswein, A., Griessl, M., Hufnagel, F. et al. Disordered charge distributions and dielectric loss in extra dense flint glasses. Appl. Phys. A 51, 382–386 (1990). https://doi.org/10.1007/BF00348377
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DOI: https://doi.org/10.1007/BF00348377