Glass devitrification and electrical properties of LiNaGe<sub>4</sub>O<sub>9</sub>

Diachenko, A. O.; Trubitsyn, M. P.; Volnianskii, M. D.; Jankowska‐Sumara, Irena; Skrypnik, Ye. V.; Коптєв, М. М.

doi:10.1080/15421406.2021.1905271

Cited by 2 publications

(6 citation statements)

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“…Conductivity  was measured in AC field with frequencies 10 3 ÷ 10 6 Hz by using LCR meter Keysight E4980AL. The measurements were carried out during heating from 300 K up to the temperature 820 K of the glass devitrification [9]. Heating rate was about 5 K/min.…”

Section: Resultsmentioning

confidence: 99%

“…2 shows the temperature dependencies of electrical conductivity, which in accord with (1) is plotted in Arrhenius scale. The DSC curve showing the thermal anomalies accompanying LNG glass devitrification on heating [9] is presented in the inset to Fig. 2.…”

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

“…2. One can see that the glass starts to soften at Tg = 780 K whereas final crystallization happens at Tc = 820 K [9].…”

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

“…The σ(1/T) dependencies show nearly linear behavior in the interval from ~550 K to glass transition temperature Tg [9,10]. The slope of the σ(1/T) dependencies in the interval 550 K ÷ Tg decreases in energy units from 1,07 eV to 0,77 eV with increasing AC field frequency from 1 kHz to 1 MHz (Table 1).…”

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

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Electrical conductivity of lithium-sodium tetragermanate in amorphous state

et al. 2022

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The glass of lithium-sodium tetragermanate LiNaGe4O9 was prepared by rapid quenching the melt. The structure of the glass was characterized by X-ray phase analysis. Electrical conductivity σ was measured in AC field (f = 1 kHz÷1 MHz) in the interval Т = 300÷900 K. It was shown that at T > 550 K the typical values of the glass σ were at least one–two orders of magnitude higher than in the single crystal. Ionic conductivity in disordered amorphous and ordered crystalline states was discussed by accounting the structure of lithium-sodium tetragermanate. The main contribution to conductivity in LiNaGe4O9 glass was associated with thermally activated motion of Li ions which were weakly bound to Ge-O structuralframework.

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Section: Resultsmentioning

confidence: 99%

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

“…2. One can see that the glass starts to soften at Tg = 780 K whereas final crystallization happens at Tc = 820 K [9].…”

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

Section: Fig1 X-ray Diffraction Pattern For the Lng Glassmentioning

confidence: 99%

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Electrical conductivity of lithium-sodium tetragermanate in amorphous state

et al. 2022

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“…We used the same approach for LNG composition. We quenched the melt and obtained LNG glass, and then, using the data of differential scanning calorimetry (DSC) we heat treated amorphous-crystalline and polycrystalline LNG [7][8][9]. For the following study, it is necessary to obtain as complete information as possible on phase composition and morphology of the samples prepared.…”

Section: Introductionmentioning

confidence: 99%

X-ray study of glassy, glass-ceramic, and polycrystalline LiNaGe4O9

Diachenko,

Skrypnik,

Trubitsyn

et al. 2023

J. Phys. Electron.

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X-ray diffraction was used to study the phase compositions of lithium tetragermanate LiNaGe4O9 glass and states obtained through its heating and crystallization. LiNaGe4O9 glass was obtained by quenching the melt. The amorphous-crystalline samples were prepared by isothermal heat treating at the temperatures chosen between the glass transition Tg = 783 K and devitrification TC = 829 K points. The polycrystalline samples were obtained by heating the glass well above TC. It was shown that in the glassy samples amorphous phase occupied about 92% of the whole volume, whereas the rest (~8%) fell on regions with ordered structure. In the amorphous-crystalline samples, disordered and ordered regions each occupied about half of the volume. In the polycrystalline samples, ordered regions occupied near 96% of the sample volume. The average size of ordered regions in the glass and amorphous-crystalline samples was estimated about 35 nm. In the polycrystalline samples, crystallites notably grew and had linear size near 120 nm. The obtained data demonstrate that controlled glass crystallization represents an effective way to prepare nanometer size structured solids.

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Glass devitrification and electrical properties of LiNaGe₄O₉

Cited by 2 publications

References 32 publications

Electrical conductivity of lithium-sodium tetragermanate in amorphous state

Electrical conductivity of lithium-sodium tetragermanate in amorphous state

X-ray study of glassy, glass-ceramic, and polycrystalline LiNaGe4O9

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Glass devitrification and electrical properties of LiNaGe4O9

Cited by 2 publications

References 32 publications

Electrical conductivity of lithium-sodium tetragermanate in amorphous state

Electrical conductivity of lithium-sodium tetragermanate in amorphous state

X-ray study of glassy, glass-ceramic, and polycrystalline LiNaGe4O9

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Glass devitrification and electrical properties of LiNaGe₄O₉