Ionic mobility and structure of glasses in Zrf4—Bif3—Mf2 (M = Sr, Ba, Pb) systems according to Nmr, Ir, and Raman spectroscopic data

Kavun, V. Ya.; Slobodyuk, A. B.; Voĭt, E. I.; Sinebryukhov, Sergey L.; Merkulov, E. B.; Гончарук, В. К.

doi:10.1007/s10947-010-0131-y

Cited by 30 publications

(6 citation statements)

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“…As shown in Figure 2, the peculiarity of ZBLAN20 is also reflected in the fractional SE law. Regarding this point, it is interesting to note that the related glassy materials, ZrF 4 ‐BiF 3 ‐MF 2 (M = Sr, Ba, and Pb), [ 47 ] are known as anionic F −1 ion conductors which exbihit high ionic conductivity.…”

Section: Resultsmentioning

confidence: 99%

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Aniya

Ikeda

2020

Physica Status Solidi (b)

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Herein, the relation between the Arrhenius crossover (AC) behaviors in the structural relaxation and the electrical conductivity relaxation is explored in terms of the Bond Strength–Coordination Number Fluctuation (BSCNF) model developed by the authors. For the ionic glass‐forming liquids and solution examined, Ca2K3(NO3)7, Ca2Rb3(NO3)7, ZBLAN20 and (LiCl)0.16(H2O)0.84, the electric conductivity at high temperature resembles the behavior of the high‐temperature structural relaxation. This mutual relationship suggests a similar origin of the AC behaviors for both, structural and electrical relaxation. The difference between them is reflected in the different temperatures that demarcate the AC behaviors. The implication of this difference to the occurrence of the high ionic conduction via the decoupling mechanism is discussed in terms of the BSCNF model and the fractional Stokes–Einstein law.

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Section: Resultsmentioning

confidence: 99%

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Aniya

Ikeda

2020

Physica Status Solidi (b)

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“…During the past years, single- and multiphase solid fluorine ion conductors in quite different structural forms, such as glasses and glass ceramics, − single crystals, − as well as micro- and nanocrystalline − materials, have been the topic of numerous impedance spectroscopic studies. The aim of such studies is to understand ionic conduction mechanisms by exploring the features of electrical relaxation dynamics in solids.…”

Section: Introductionmentioning

confidence: 99%

Mixed Alkaline-Earth Effect in the Metastable Anion Conductor Ba_1–xCa_xF₂ (0 ≤ x ≤ 1): Correlating Long-Range Ion Transport with Local Structures Revealed by Ultrafast ¹⁹F MAS NMR

et al. 2011

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Fast ion conductors are urgently needed in many research areas of materials science. Advanced preparation strategies take advantage of an interplay of structural disorder, nanosize effects, and metastability. Getting access to detailed insights into the microstructure of such solids is crucial to identify the origins of fast ion conduction. High-resolution and high-sensitive spectroscopic techniques are well-suited to meet this challenge. Here, ion transport properties of a highly conducting, metastable fluoride with two isovalent cations were interrelated with the microscopic, atomic-scale structure probed by ultrafast 19 F magic angle spinning (MAS) nuclear magnetic resonance (NMR). Nanocrystalline samples of Ba 1Àx Ca x F 2 (0 e x e 1) were prepared according to a mechanochemical route from BaF 2 and CaF 2 . The resulting DC ion conductivity, when plotted as a function of x, passes through a well-developed maximum, which is located at x m = 0.5, while the associated activation energy E a shows a minimum at x m . As revealed by 19 F MAS NMR, five magnetically inequivalent F sites are present in the cation-mixed fluorides. These sites are characterized by a distinct number of Ba and Ca cations in the first coordination shell: [Ba] n [Ca] 4Àn (0 e n e 4). The mixed sites with n = 1,2,3 dominate the NMR spectra at intermediate values of x. Presumably, the mixed cation sublattice, causing the metastability of the compounds, influences both the formation energy of, for example, F interstitials, as well as the migration energy leading to the fast ion conduction observed.

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“…35 Zr–F bands could not be detected as the measurement at this end was limited to 400 cm −1 . 36 The data also show bands for i Pr residues, which suggests that a complete fluorination did not occur with HF.…”

Section: Resultsmentioning

confidence: 90%

A fluorolytic sol–gel route to access an amorphous Zr fluoride catalyst: a useful tool for C–F bond activation

Heinekamp,

Kneiske,

Guilherme Buzanich

et al. 2024

Catal. Sci. Technol.

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Ionic mobility and structure of glasses in Zrf4—Bif3—Mf2 (M = Sr, Ba, Pb) systems according to Nmr, Ir, and Raman spectroscopic data

Cited by 30 publications

References 11 publications

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Mixed Alkaline-Earth Effect in the Metastable Anion Conductor Ba_1–xCa_xF₂ (0 ≤ x ≤ 1): Correlating Long-Range Ion Transport with Local Structures Revealed by Ultrafast ¹⁹F MAS NMR

A fluorolytic sol–gel route to access an amorphous Zr fluoride catalyst: a useful tool for C–F bond activation

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Ionic mobility and structure of glasses in Zrf4—Bif3—Mf2 (M = Sr, Ba, Pb) systems according to Nmr, Ir, and Raman spectroscopic data

Cited by 30 publications

References 11 publications

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Arrhenius Crossover Phenomena and Ionic Conductivity in Ionic Glass‐Forming Liquids

Mixed Alkaline-Earth Effect in the Metastable Anion Conductor Ba1–xCaxF2 (0 ≤ x ≤ 1): Correlating Long-Range Ion Transport with Local Structures Revealed by Ultrafast 19F MAS NMR

A fluorolytic sol–gel route to access an amorphous Zr fluoride catalyst: a useful tool for C–F bond activation

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Mixed Alkaline-Earth Effect in the Metastable Anion Conductor Ba_1–xCa_xF₂ (0 ≤ x ≤ 1): Correlating Long-Range Ion Transport with Local Structures Revealed by Ultrafast ¹⁹F MAS NMR