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- W1985633029 abstract "Abstract A comparative study of transport properties of two series of fluoride glasses ZrF 4 (0.55)AlF 3 (0.04) BaF 2 (0.385 − x )LaF 3 (0.025 + x ) (0.00 ≲ x ≲ 0.07) and ZrF 4 (0.55)AlF 3 (0.04)BaF 2 (0.37 − x )YF 3 (0.04 + x) (0.00 ≲ x ≲ 0.05) has been carried out as a function of x . The ac conductivity data have been analyzed by the complex modulus formalism. An Arrhenius behavior is shown for dc conductivity and modulus relaxation time with very close activation energies, and a hopping mechanism for transport in these materials is suggested. A 19 F NMR investigation showed that the NMR line is due to the existence of differing fluoride ion sublattices and that a partial exchange occurs between with increasing temperature. The deconvolution of spectra measured at low temperature is composed of two peaks which have been interpreted in terms of non-bridging and bridging fluoride ions. Composition dependence of dc conductivity, conductivity relaxation time and 19 F NMR lines indicate an enhancement of electrical performance with an increase of BaF 2 ." @default.
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- W1985633029 date "1993-09-01" @default.
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- W1985633029 title "Ionic conductivity and 19F NMR investigations of some series of ZrF4-based fluoride glasses containing LaF3 or YF3" @default.
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- W1985633029 doi "https://doi.org/10.1016/0022-3093(93)90753-k" @default.
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