Synthesis and evaluation of Pb1−xSnxF2 by mechanical milling

Uno, Masatoshi; Onitsuka, Masanori; Ito, Yoshiaki; Yoshikado, Shinzo

doi:10.1016/j.ssi.2005.06.028

Cited by 34 publications

(30 citation statements)

References 18 publications

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“…For example, Uno et al examined β-PbSnF4 obtained by mechanical milling of PbF2 and SnF2 powders with a certain ratio of the materials. 21 The conductivity depends on the materials ratio and is largest (~ 1.6 × 10 -3 Scm -1 at room temperature) at PbF2:SnF2=50:50. Interestingly, the conductivity can be improved by ca.…”

Section: Introductionmentioning

confidence: 99%

High Anionic Conductive Form of Pb_xSn_2–xF₄

et al. 2019

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High anionic conductivity of ~ 3.5 × 10-3 Scm-1 at room temperature is achieved for PbxSn2-xF4 (x = 1.21) obtained by annealing a mechanically-milled PbF2/SnF2 mixture at 400 °C. The observed synchrotron X-ray diffraction patterns indicate formation of a new tetragonal phase at x = 1.1 ~ 1.3. The Rietveld analysis of the neutron diffraction patterns leads to a unique structure consisting of two alternating layers; a double Pb layer and a triple layer, each flanked by a single Sn layer. As the Rietveld analysis does not fully converge, the authors further apply high-resolution solid-state NMR (19 F, 119 Sn, and 207 Pb) to confirm the structure. Further the 19 F-207 Pb cross-polarization experiment shows that most of Fions, except for those lie between the double Pb layers, contribute to its high ionic conductivity. The high conductivity is also attributed to structural flexibility of the triple Pb layers, indicated by temperature dependent 207 Pb NMR spectra.

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Section: Introductionmentioning

confidence: 99%

High Anionic Conductive Form of Pb_xSn_2–xF₄

et al. 2019

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“…The products were investigated exclusively by X-ray diffraction (XRD) [13]. Further studies were published on milling of PbF 2 and NH 4 F with SnF 2 to examine the influence of grain sizes on the ion conductivity [14][15][16]. More recently, mechanochemical reactions of alkali acid bifluorides (MHF 2 ) with alkali halides (MX) were studied by XRD and IR spectroscopy [17].…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline CaF2 particles obtained by high-energy ball milling

Scholz

Dörfel

Heidemann

et al. 2006

Journal of Solid State Chemistry

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“…Введение SnF 2 в матрицу β-PbF 2 приводит к образованию в системе PbF 2 − SnF 2 [5] флюоритовой фазы (изовалентного твердого раствора) Pb 1−x Sn x F 2 с постоянным числом атомов в элементарной ячейке и предельной концентрацией 33 mol.% SnF 2 (x = 0.33) при эвтектической температуре 565 • C. Исследования ионного транспорта в суперионном проводнике Pb 1−x Sn x F 2 выполнены на поликристаллических образцах [6,7], монокристаллах [8,9] и нанокерамике [10][11][12][13]. Также в работах [9,12] были определены частоты перескоков ионных носителей заряда в монокристаллах (x = 0.1 и 0.2) и нанокерамике (x = 0.2−0.5).…”

Section: Introductionunclassified

“…В работах [10,11] нанокристаллические (25−29 nm) порошки Pb 1−x Sn x F 2 получены механохимическим синтезом со скоростью помола 200−800 rpm в течение 8 h в атмосфере N 2 . Синтезированные неравновесные флюоритовые порошки Pb 1−x Sn x F 2 содержали 20−50 mol.% SnF 2 , что превышает верхнюю границу (33 mol.% SnF 2 ) равновесной области гомогенности из фазовой диаграммы системы PbF 2 −SnF 2 [5].…”

Section: Introductionunclassified

“…таблетки. Их отжиг при 300 • C в атмосфере N 2 в течение 6 h приводил к росту размера кристаллических зерен [10]. На рисунке показана построенная по экспериментальным данным [6,7,9,12] концентрационная зависимость проводимости σ dc (x) при 293 K для поли-нанои монокристаллов из равновесной области гомогенности твердого раствора Pb 1−x Sn x F 2 .…”

Section: Introductionunclassified

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Подвижность носителей заряда в монокристалле и нанокерамике суперионного проводника Pb-=SUB=-1-x-=/SUB=-Sn-=SUB=-x-=/SUB=-F-=SUB=-2-=/SUB=- (x=0.2)

Сорокин¹

2019

Физика Твердого Тела

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A crystallophysical model of ion transfer in the superionic Pb_1 – _ x Sn_ x F_2 conductor with a fluorite (CaF_2) structure is proposed. The concentration dependence of the ionic conductivity of Pb_1 – _ x Sn_ x F_2 single crystals and poly- and nanocrystals is analyzed. The single-crystal form of the superionic conductor is characterized by the highest conductivity. The mobility and concentration of anionic charge carriers in a single crystal and ceramics of Pb_1 – _ x Sn_ x F_2 ( x = 0.2) is calculated on the basis of structural and electrophysical data. The mobility of carriers μ_mob = 2.5 × 10^–6 cm^2/s V (at 293 K) in a single crystal is seven times higher than in nanoceramic. The concentration of carriers n _mob = 1.7 × 10^21 and 3.6 × 10^21 cm^3 (4.5 and 9.5% of the total number of anions) for a single crystal and nanoceramic, respectively. The comparison of isostructural Pb_0.8Sn_0.2F_2, Pb_0.67Cd_0.33F_2, and Pb_0.9Sc_0.1F_2.1 single crystals shows that anionic carriers have a maximum mobility in the β-PbF_2 and SnF_2 based solid solution.

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Synthesis and evaluation of Pb1−xSnxF2 by mechanical milling

Cited by 34 publications

References 18 publications

High Anionic Conductive Form of Pb_xSn_2–xF₄

High Anionic Conductive Form of Pb_xSn_2–xF₄

Nanocrystalline CaF2 particles obtained by high-energy ball milling

Подвижность носителей заряда в монокристалле и нанокерамике суперионного проводника Pb-=SUB=-1-x-=/SUB=-Sn-=SUB=-x-=/SUB=-F-=SUB=-2-=/SUB=- (x=0.2)

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Synthesis and evaluation of Pb1−xSnxF2 by mechanical milling

Cited by 34 publications

References 18 publications

High Anionic Conductive Form of PbxSn2–xF4

High Anionic Conductive Form of PbxSn2–xF4

Nanocrystalline CaF2 particles obtained by high-energy ball milling

Подвижность носителей заряда в монокристалле и нанокерамике суперионного проводника Pb-=SUB=-1-x-=/SUB=-Sn-=SUB=-x-=/SUB=-F-=SUB=-2-=/SUB=- (x=0.2)

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High Anionic Conductive Form of Pb_xSn_2–xF₄

High Anionic Conductive Form of Pb_xSn_2–xF₄