Synthesis and homogeneity range of Yb8−xYxV2O17 in the Yb8V2O17–Y8V2O17 system

Piz, Mateusz; Filipek, E.

doi:10.1007/s10973-017-6379-0

Cited by 7 publications

(13 citation statements)

References 35 publications

(68 reference statements)

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“…1b) and Y 8 V 2 O 17 (Fig. 1c) obtained in the context of this paper, which are almost identical to that shown in [7].…”

Section: Methodssupporting

confidence: 89%

“…Preliminary studies of the ternary oxides V [7]. This result is contrary to the literature data [8].…”

Section: Introductioncontrasting

confidence: 79%

“…Yb 8 V 2 O 17 [7]. They look like polygons of irregular shapes and different sizes, varying from 0.5 to 9 µm (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…• [7]. In the present study the electrical and optical properties of Yb 8−x Y x V 2 O 17 for x = 0 and 8 [7][8][9] as well as for a new phase (x = 2) were carried out.…”

Section: Introductionmentioning

confidence: 99%

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Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

et al. 2017

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The UV-vis-NIR and electrical properties of Yb8−xYxV2O17 for x = 0, 2, and 8 were investigated. The band energy gap of 2.6 eV determined for Yb6Y2V2O17 (x = 2) and comparable for the remaining compounds with x = 0 and 8 is characteristic for insulators. Low electrical conductivity with a characteristic minimum shifting to higher temperatures from 322, via 360 to 370 K in the sequence x = 0, 2 and 8, which decreases with increasing content of ytterbium was observed. Temperature dependence of thermoelectric power showed n−p transition at 410 and 467 K for x = 0 and 2, respectively, and n-type conductivity for x = 8, indicating mainly n-type electrical conductivity. A breakdown voltage of 26 V/mm is mainly observed for the I−V characteristics at 400 K and showing a varistor-like behavior.

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“…1b) and Y 8 V 2 O 17 (Fig. 1c) obtained in the context of this paper, which are almost identical to that shown in [7].…”

Section: Methodssupporting

confidence: 89%

“…Preliminary studies of the ternary oxides V [7]. This result is contrary to the literature data [8].…”

Section: Introductioncontrasting

confidence: 79%

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Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

et al. 2017

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“…The high-energy ball milling has been successfully used for syntheses of many new functional materials such as alloys, intermetallic compounds, polymer or inorganic composites, ceramic materials [1][2][3][4][5][6]. According to the hitherto-published literature on the binary oxides of our concern, V 2 O 5 -Yb 2 O 3 , the formation of two compounds YbVO 4 and Yb 8 V 2 O 17 in this oxide system has been documented [7][8][9][10][11][12][13][14][15][16]. They have been obtained as a result of high-temperature treatment of the oxides mixture containing V 2 O 5 and Yb 2 O 3 of the contents chosen to match the stoichiometry of these compounds [11,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Characterization of phases in the V2O5–Yb2O3 system obtained by high-energy ball milling and high-temperature treatment

et al. 2018

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It has been demonstrated that apart from the known compounds YbVO 4 and Yb 8 V 2 O 17 , a substitutive solid solution is also formed in the binary oxide system V 2 O 5 -Yb 2 O 3 . This solid solution is characterized by limited solubility of vanadium(V) oxide in the crystal lattice of ytterbium oxide, and its general formula is Yb 2-5x h 2x V 3x O 3 , where 0.00 \ x \ 0.1667. The new solid solution was obtained from the mixtures of V 2 O 5 and Yb 2 O 3 oxides, containing vanadium(V) oxide in the amounts not exceeding 30 mol%, by high-energy ball milling in a planetary ball mill. The solid solution obtained was characterized using the methods XRD, DTA-TG, SEM, IR and UV-Vis-DR. It was found to crystallize in cubic system and to show a structure of Yb 2 O 3 . This solid solution was stable in air atmosphere at least up to * 800°C, and the temperature of its decomposition decreased with increasing x, so with increasing degree of Yb 3? replacement with V 5? in the crystal lattice of Yb 2 O 3 . The energy gap estimated for this solid solution varied from * 2.5 eV for x = 0.0322 to * 2.6 eV for x = 0.1176, which means that this new solid solution is a semiconductor.

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Eu³⁺‐Activated Gd₈V₂O₁₇: Energy Transfer, Luminescence, and Temperature‐Dependence Characteristics

Deng

Liu

Zhou

et al. 2018

Chemistry A European J

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A new phosphor of the type Gd Eu V O (x=0-1.0) was synthesized through the solid-state reaction ceramics method. A pure phase formation was verified by using X-ray powder diffraction measurements. The luminescence of Gd V O :Eu was investigated through optical and laser excitation spectroscopy. The luminescence curves were investigated in the temperature region 10 to 300 K. Gd V O shows a self-activated luminescence under excitation with UV- and near-UV light. The spectra, the decay lifetimes, and the thermal stability of Gd Eu V O (x=0.005-1.0) strongly depend on both the Eu concentration and the temperature. The tunable luminescence is realized by controlling the Eu -doping level to adjust the host energy-transfer efficiency from the VO groups to the Eu activators. At low Eu concentrations (<30 mol %), the intensity and lifetime show an unusual change with an increase of the temperature from 10-300 K, that is, the luminescence experiences a straightforward enhancement. The energy transfer from the VO group to the Eu ions could be accelerated with an increase of the temperature resulting in an unusual enhancement of the Eu luminescence and lifetime. However, the emission of the Eu ions decreased for highly Eu-doped samples (>30 mol %) with an increase of the temperature. The luminescence mechanism was discussed on the basis of the charge-transfer band of the Eu ions, the doping concentration, and the proposed microstructures in the lattices.

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Synthesis and homogeneity range of Yb8−xYxV2O17 in the Yb8V2O17–Y8V2O17 system

Cited by 7 publications

References 35 publications

Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

Characterization of phases in the V2O5–Yb2O3 system obtained by high-energy ball milling and high-temperature treatment

Eu³⁺‐Activated Gd₈V₂O₁₇: Energy Transfer, Luminescence, and Temperature‐Dependence Characteristics

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Synthesis and homogeneity range of Yb8−xYxV2O17 in the Yb8V2O17–Y8V2O17 system

Cited by 7 publications

References 35 publications

Electrical Transport Properties of Yb8-xYxV2O17 (x=0,2,8)

Electrical Transport Properties of Yb8-xYxV2O17 (x=0,2,8)

Characterization of phases in the V2O5–Yb2O3 system obtained by high-energy ball milling and high-temperature treatment

Eu3+‐Activated Gd8V2O17: Energy Transfer, Luminescence, and Temperature‐Dependence Characteristics

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Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

Electrical Transport Properties of Yb_8-xY_xV₂O₁₇ (x=0,2,8)

Eu³⁺‐Activated Gd₈V₂O₁₇: Energy Transfer, Luminescence, and Temperature‐Dependence Characteristics