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Abstracts
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.
Discipline
- 77.84.-s: Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials(for nonlinear optical materials, see 42.70.Mp; for dielectric materials in electrochemistry, see 82.45.Un)
- 61.43.-j: Disordered solids(see also 81.05.Gc Amorphous semiconductors, 81.05.Kf Glasses, and 81.05.Rm Porous materials; granular materials in materials science; for photoluminescence of disordered solids, see 78.55.Mb and 78.55.Qr)
- 68.37.Ps: Atomic force microscopy (AFM)
- 66.10.Ed: Ionic conduction
Journal
Year
Volume
Issue
Pages
892-896
Physical description
Dates
published
2018-04
Contributors
author
- Oles'Honchar Dnipro National University, prosp. Gagarina 72, Dnipro, 49010, Ukraine
author
- Oles'Honchar Dnipro National University, prosp. Gagarina 72, Dnipro, 49010, Ukraine
author
- Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska Str., Kyiv, 01601, Ukraine
author
- Oles'Honchar Dnipro National University, prosp. Gagarina 72, Dnipro, 49010, Ukraine
author
- Oles'Honchar Dnipro National University, prosp. Gagarina 72, Dnipro, 49010, Ukraine
author
- Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska Str., Kyiv, 01601, Ukraine
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv133n4p31kz