Complex impedance spectra of glass in glass ceramics Li2O-11.5GeO2

Nesterov, О. O.; Trubitsyn, M. P.; Plyaka, S. N.; Volnyanskii, D. M.

doi:10.1134/s1063783415090255

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…5, crystallites with an average linear size of ≈ 40 nm occupy about 20% of the total surface area. As it was shown in [18,19], the state of the samples below glass transition point T g practically did not change. Glass could be transformed to polycrystal by heating to T >T 2 or by isothermal treating for certain time above T g .…”

Section: The Mechanism Of LI 2 O-7geo 2 Glass Crystallizationmentioning

confidence: 58%

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Ionic Conductivity in Multiphase Li₂O-7GeO₂Compounds

et al. 2018

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Crystallization of Li2O-7GeO2 glass was carried out on heating, simultaneously differential scanning calorimetry and electric properties were studied. Morphology of the phase states obtained at glass devitrification was examined by atomic force microscopy. It was shown that amorphous phase of Li2O-7GeO2 was crystallized in stages through the intermediate state with increased conductivity σ. In the intermediate state the sample volume was occupied by nanometer-sized nuclei with ordered structure surrounded by internuclear amorphous medium. Complete glass crystallization occurred through transformation of nanometer-sized nuclei into micrometer-sized crystallites and was accompanied by a sharp and irreversible decrease of conductivity. Atomic force microscopy of the samples heat-treated in different ways showed that Li2O-7GeO2 glass crystallization was suppressed near the surface and mainly proceeded within the sample bulk. Charge transfer in amorphous, nanocrystalline intermediate and polycrystalline phases of Li2O-7GeO2 was associated with motion of the weakly bound Li ions.

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Section: The Mechanism Of LI 2 O-7geo 2 Glass Crystallizationmentioning

confidence: 58%

“…In Refs. [18][19][20] it was revealed that the intermediate state in the Li 2 O-xGeO (x = 7, 11.5) was metastable and characterized by increased electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%