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

Автор(и)

  • A. O. Diachenko Institute for Energy Efficient Technologies and Materials Sciences, Oles Honchar Dnipro National University, Dnipro, Ukraine
  • Ye. V. Skrypnik Institute for Energy Efficient Technologies and Materials Sciences, Oles Honchar Dnipro National University, Dnipro, Ukraine
  • M. P. Trubitsyn Institute for Energy Efficient Technologies and Materials Sciences, Oles Honchar Dnipro National University, Dnipro, Ukraine
  • M. D. Volnianskii Institute for Energy Efficient Technologies and Materials Sciences, Oles Honchar Dnipro National University, Dnipro, Ukraine
  • O. S. Baskevich Ukrainian State University of Chemical Technology, Dnipro, Ukraine

DOI:

https://doi.org/10.15421/332304

Ключові слова:

lithium tetragermanate LiNaGe4O9, glass crystallization, X-ray phase analysis

Анотація

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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Опубліковано

2023-12-21

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