Phase relations and spectral properties of new phases in Sc2O3–V2O5–Nb2O5–Ta2O5 system

Архипова, Е. В.; Зуев, М. Г.; Perelyaeva, L. A.

doi:10.1016/j.jallcom.2005.07.018

Cited by 10 publications

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References 10 publications

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“…The solid solutions formed in the binary system of V 2 O 5 and Yb 2 O 3 oxides show the structure of vanadium (V) oxide and/or ytterbium (III) oxide. It is known from the literature that V 2 O 5 oxide is an n-type paramagnetic insulator [6] that is applied in the production of novel materials used, e.g., in medicine [7] or as electrodes in lithium batteries [8]. Yb 2 O 3 oxide has the rare-earth C-type sesquioxide cubic structure, which is related to the fluorite structure with one-quarter of the anions removed, leading to ytterbium atoms in two different six-coordinate (nonoctahedral) environments [9].…”

Section: Introductionmentioning

confidence: 99%

Electrical Properties of Yb_2-xV_xO_3+x Nanomaterials Obtained Mechanochemically from Yb₂O₃ and V₂O₅ Oxides

et al. 2022

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Electrical measurements were carried out on nanocrystals Yb2−xVxO3+x (YbVO) (where x = 0.10, 0.15, 0.20, 0.30, and 0.40) obtained in the high-energy ball milling process, which crystallite size increased from 23.3 to 42.4 nm with increasing vanadium content. Electrical conductivity and thermoelectric power studies showed insulating properties in the extrinsic region (77-300 K) and n-type semiconductivity in the intrinsic one (350-400 K) with an activation energy of 1.3 eV. Broadband dielectric spectroscopy studies showed a low relative dielectric permittivity (εr < 16) and loss tangent (tan(δ) < 0.05) weakly dependent on temperature and frequency with the exception of a wide maximum between 200 and 300 K, suggesting an antiferroelectric-paraelectric phase transition. The most interesting result is the observation of a strong increase in the thermoelectric power factor with an increase in unit cell volume and nanograin size in a highly thermally activated Arrhenius region.

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Section: Introductionmentioning

confidence: 99%

Electrical Properties of Yb_2-xV_xO_3+x Nanomaterials Obtained Mechanochemically from Yb₂O₃ and V₂O₅ Oxides

et al. 2022

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“…The structural and other properties of solid solutions 5, 10 The replacement of atoms in the anion and cation sublattices during the formation of solid solutions needs a detailed consideration. It is known that vanadium tends to change its charge in such compounds.…”

Section: Introductionmentioning

confidence: 99%

Solid state NMR characterization of individual compounds and solid solutions formed in Sc₂O₃V₂O₅Nb₂O₅Ta₂O₅ system

Khabibulin

Romanenko

Зуев

et al. 2007

Magnetic Reson in Chemistry

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In this study, (51)V, (45)Sc and (93)Nb MAS NMR combined with satellite transition spectroscopy analysis were used to characterize the complex solid mixtures: VNb(9(1-x))Ta(9x)O(25), ScNb((1-x))Ta(x)O(4) and ScNb(2(1-x))Ta(2x)VO(9) (x = 0, 0.3, 0.5, 0.7, 1.0). This led us to describe the structures of Sc and V sites. The conclusions were based on accurate values for (51)V quadrupole coupling and chemical shift tensors obtained with (51)V MAS NMR/SATRAS for VNb(9)O(25), VTa(9)O(25) and ScVO(4). The (45)Sc NMR parameters have been obtained for Sc(2)O(3), ScVO(4), ScNbO(4) and ScTaO(4). On the basis of (45)Sc NMR and data available from literature, the ranges of the (45)Sc chemical shift have been established for ScO(6) and ScO(8). The gradual change of the (45)Sc and (51)V NMR parameters with x confirms the formation of solid solutions in the process of synthesis of VNb(9(1-x))Ta(9x)O(25) and ScNb((1-x))Ta(x)O(4), in contrast to ScNb(2(1-x))Ta(2x)VO(9). The cation sublattice of ScNb((1-x))Ta(x)O(4) is found to be in octahedral coordination. The V sites in VNb(9(1-x))Ta(9x)O(25) are present in the form of slightly distorted tetrahedra. The (93)Nb NMR parameters have been obtained for VNb(9)O(25).

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Phase Relations and Spectral Properties of New Phases in Sc₂O₃—V₂O₅—Nb₂O₅—Ta₂O₅ System.

2006

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Phase relations and spectral properties of new phases in Sc2O3–V2O5–Nb2O5–Ta2O5 system

Cited by 10 publications

References 10 publications

Electrical Properties of Yb_2-xV_xO_3+x Nanomaterials Obtained Mechanochemically from Yb₂O₃ and V₂O₅ Oxides

Electrical Properties of Yb_2-xV_xO_3+x Nanomaterials Obtained Mechanochemically from Yb₂O₃ and V₂O₅ Oxides

Solid state NMR characterization of individual compounds and solid solutions formed in Sc₂O₃V₂O₅Nb₂O₅Ta₂O₅ system

Phase Relations and Spectral Properties of New Phases in Sc₂O₃—V₂O₅—Nb₂O₅—Ta₂O₅ System.

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Phase relations and spectral properties of new phases in Sc2O3–V2O5–Nb2O5–Ta2O5 system

Cited by 10 publications

References 10 publications

Electrical Properties of Yb2-xVxO3+x Nanomaterials Obtained Mechanochemically from Yb2O3 and V2O5 Oxides

Electrical Properties of Yb2-xVxO3+x Nanomaterials Obtained Mechanochemically from Yb2O3 and V2O5 Oxides

Solid state NMR characterization of individual compounds and solid solutions formed in Sc2O3V2O5Nb2O5Ta2O5 system