Effect of Li2O–Al2O3–GeO2–P2O5 glass crystallization on stability versus molten lithium

Першина, С. В.; Il’ina, E. A.; Druzhinin, K. V.; Фарленков, А. С.

doi:10.1016/j.jnoncrysol.2019.119708

Cited by 21 publications

(7 citation statements)

References 18 publications

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Section: Resultsmentioning

confidence: 99%

“…The introduction of Li + ions did not change the lattice structure of NaYF 4 ; many studies support that Li + exists stably in GC materials. 22,39,40 The grain sizes calculated by the Debye-Scherer formula were 21.6 nm (GC1), 24.2 nm (GC2), 28.4 nm (GC3), and 29.9 nm (GC4). Further microstructure and element distribution of GC3 were analyzed via TEM, where the corresponding TEM images demonstrated that the GC was composed of a lowcontrast glass phase and high-contrast nanocrystalline phase (Fig.…”

Section: Dalton Transactions Communicationmentioning

confidence: 99%

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Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Section: Dalton Transactions Communicationmentioning

confidence: 99%

Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations

et al. 2023

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“…This behavior is a feature of the ionic conduction process that can be described by the Arrhenius relation. Figure (5) shows that there is a fast change in both log 200 and E with increasing Al2O3 contents. The result reveals that conductivity decreases by about six orders of magnitude upon replacing 30 mol% Ag2O with Al2O3.…”

Section: Electrical Conductivitymentioning

confidence: 95%

“…In recent decades, glass or glass-ceramics containing Al2O3, such as Al2O3-B2O3, Al2O3-SiO2, or Al2O3-B2O3-SiO2, and Al2O3-P2O5 systems, have gotten a lot of attention [1][2][3][4]. This is because the presence Al2O3 can form interconnected bonds in glass systems, leading to an improvement in the chemical stability [5] and good mechanical properties [6,7]. Physical properties of Al2O3containing glasses, such as micro-hardness, conductivity, and chemical durability, are strongly linked to their Al coordination, which changes from six (AlO6) to five (AlO5) to four (AlO4) coordination [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of aluminum oxide on the structure and conduction behaviors of silver borate glasses

Damrawi¹,

Abdelghany²,

Salaheldin³

2022

Bull. Chem. Soc. Eth.

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ABSTRACT. The current study focuses on glass preparation and characterization in the glass system of chemical formula xAl2O3 (35-x) Ag2O.65B2O3 (0≤x≤35 mol%), where Ag2O is replaced with Al2O3. To examine a wide range of both structure and morphology of the prepared glasses, nuclear magnetic resonance (NMR) of 27Al nuclei, X-ray diffraction (XRD) spectroscopy, and transmission electron microscopy (TEM) are used. In Al2O3-rich glass, the well-formed AlO6, AlO5, and AlO4 structural groups are the well-formed units. In samples of (20 and 30 mol % Al2O3), tetrahedral AlO4 and traces from AlO6 units could be detected. At lower concentrations of Al2O3 (10 mol%), the dominant forming unit is only AlO4 groups containing non-bridging oxygen bonds (NBO). The XRD spectra confirm the amorphous nature of the glasses of Al2O3 ˂20 mol% while glasses of higher Al2O3 concentrations contain crystalline Ag2Al2B2O7 formed due to the higher oxygen packaging of the mixed AlO5 and AlO4 compared with that of glasses containing only AlO4 species only. The morphology of crystalline units is confirmed from TEM to differ from that of an amorphous composition. The increase of activation energy and the hardness number of the glasses led to an increase in the durability of the investigated glasses. KEY WORDS: Aluminum borate glass, NMR, Coordination of aluminum atom, Conductivity, Crystallization process Bull. Chem. Soc. Ethiop. 2022, 36(3), 597-606. DOI: https://dx.doi.org/10.4314/bcse.v36i3.9

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“…Among the numerous classes of oxide conductors reported in recent years, lithiumconducting glasses and glass-ceramics are the most promising solid electrolytes for all-solidstate batteries [2,[5][6][7]. Moreover, similar glass-forming systems have a wider application both in optical materials and in nuclear technologies [8,9].…”

Section: Introductionmentioning

confidence: 99%

Solid Electrolyte Membranes Based on Li2O–Al2O3–GeO2–SiO2–P2O5 Glasses for All-Solid State Batteries

et al. 2022

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Rechargeable Li-metal/Li-ion all-solid-state batteries due to their high safety levels and high energy densities are in great demand for different applications ranging from portable electronic devices to energy storage systems, especially for the production of electric vehicles. The Li1.5Al0.5Ge1.5(PO4)3 (LAGP) solid electrolyte remains highly attractive because of its high ionic conductivity at room temperature, and thermal stability and chemical compatibility with electrode materials. The possibility of LAGP production by the glass-ceramic method makes it possible to achieve higher total lithium-ion conductivity and a compact microstructure of the electrolyte membrane compared to the ceramic one. Therefore, the crystallization kinetics investigations of the initial glass are of great practical importance. The present study is devoted to the parent glasses for the production of Li1.5+xAl0.5Ge1.5SixP3−xO12 glass-ceramics. The glass transition temperature Tg is determined by DSC and dilatometry. It is found that Tg decreases from 523.4 (x = 0) to 460 °C (x = 0.5). The thermal stability of glasses increases from 111.1 (x = 0) to 188.9 °C (x = 0.3). The crystallization activation energy of Si-doped glasses calculated by the Kissinger model is lower compared to that of Si-free glasses, so glass-ceramics can be produced at lower temperatures. The conductivity of the glasses increases with the growth of x content.

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Effect of Li2O–Al2O3–GeO2–P2O5 glass crystallization on stability versus molten lithium

Cited by 21 publications

References 18 publications

Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations

Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations

Effect of aluminum oxide on the structure and conduction behaviors of silver borate glasses

Solid Electrolyte Membranes Based on Li2O–Al2O3–GeO2–SiO2–P2O5 Glasses for All-Solid State Batteries

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Effect of Li2O–Al2O3–GeO2–P2O5 glass crystallization on stability versus molten lithium

Cited by 21 publications

References 18 publications

Dual-wavelength enhanced upconversion luminescence properties of Li+-doped NaYF4:Er,Yb glass-ceramic for all-optical logic operations

Dual-wavelength enhanced upconversion luminescence properties of Li+-doped NaYF4:Er,Yb glass-ceramic for all-optical logic operations

Effect of aluminum oxide on the structure and conduction behaviors of silver borate glasses

Solid Electrolyte Membranes Based on Li2O–Al2O3–GeO2–SiO2–P2O5 Glasses for All-Solid State Batteries

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Product

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Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations

Dual-wavelength enhanced upconversion luminescence properties of Li⁺-doped NaYF₄:Er,Yb glass-ceramic for all-optical logic operations