IONIC MOBILITY, STRUCTURE, AND CONDUCTIVITY OF 45ZrF4-35BiF3-20CsF GLASS ACCORDING TO 19F NMR, IR, RAMAN, AND IMPEDANCE SPECTROSCOPY
V. Y. Kavun, E. I. Voit, S. L. Sinebryukhov, A. B. Podgorbunskii, O. V. Brovkina, E. B. Merkulov, V. K. Goncharuk
Keywords: bismuth fluorozirconate glasses, 19F NMR spectra, ionic mobility, IR, Raman spectroscopy, ionic conductivity
Pages: 1140-1142
Abstract
19F NMR, IR, Raman and impedance spectroscopy are used to study the ionic mobility, structure, and conductivity of 45ZrF4-35BiF3-20CsF bismuth fluorozirconate glass. With the increase in temperature from 150 K to 500 K the fluorine-containing groups pass from the rigid lattice to local movements (reorientations), and then to diffusion. According to the results of IR and Raman spectroscopy, the lattice of this glass consists of ZrF8 polyhedra linked by their vertices into chains. The glass has high ionic conductivity: σ ≈ 1.8×10-4 S/cm in a temperature range of 480-485 K.
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