Electric transport in tungstates Ln2(WO4)3 (La = Yb, Lu)

Пестерева, Н. Н.; Lopatin, D. A.; Guseva, A. F.; Vostrotina, E. L.; Корона, Д. В.; Nokhrin, S. S.

doi:10.1134/s1023193517070084

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Experimental procedure of Tubandt Method.-The Tubandt method 31,32 was used to study the effective transport numbers. The tripartite cell was constructed from three equally weighted discs/ pellets in series as follows:…”

Section: Methodsmentioning

confidence: 99%

Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Morkhova,

Koroleva,

Egorova

et al. 2024

ECS Adv.

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The CaNb2O6 and ZnNb2O6 columbites (Sp.gr. Pbcn) were studied as oxygen ion conductors both theoretically and experimentally. A theoretical approach included geometrical-topological analysis, bond valence site energy (BVSE) and density functional theory (DFT) calculations. The BVSE approach showed the possibility of pure oxygen ions diffusion with migration energies less than 0.45 eV in both compounds. However, DFT calculations indicated the possibility of diffusion of both anions and cations. The single-phases columbites were synthesized by the Pechini method for accurately determine charge carriers type and investigated by impedance spectroscopy, by the Tubandt method, which confirmed the absence of cationic conductivity, and measured the electrical conductivity as a function of oxygen partial pressures. The CaNb2O6 sample had the pure oxygen-ionic conductivity ∼2×10-6 S cm–1 at 800 °C (Ea = 0.82 eV), while the ZnNb2O6 had a similar conductivity value due to mixed ionic-electronic contribution (Ea = 0.83 eV). The electromotive force method also showed the predominance of the ionic type of conductivity in CaNb2O6, while ZnNb2O6 has a mixed conductivity with ion transport number of about 0.4. Additionally, we synthesized Ti-doped samples MNb2-xTixO6-0.5x (M = Mg, Ca; x = 0.1, 0.2) to study the doping effect on conducting properties.

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Section: Methodsmentioning

confidence: 99%

Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Morkhova,

Koroleva,

Egorova

et al. 2024

ECS Adv.

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Proton /oxygen ion conductivity ratio of Nd containing La10W2O21/γ-La6W2O15 tungstates

Shlyakhtina

Baldin

Vorobieva

et al. 2023

International Journal of Hydrogen Energy

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Synthesis and study of upconversion Lu2(WO4)3: Yb3+, Tm3+ nanoparticles synthesized by modified Pechini method

et al. 2021

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Electric transport in tungstates Ln2(WO4)3 (La = Yb, Lu)

Cited by 4 publications

References 14 publications

Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Proton /oxygen ion conductivity ratio of Nd containing La10W2O21/γ-La6W2O15 tungstates

Synthesis and study of upconversion Lu2(WO4)3: Yb3+, Tm3+ nanoparticles synthesized by modified Pechini method

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Electric transport in tungstates Ln2(WO4)3 (La = Yb, Lu)

Cited by 4 publications

References 14 publications

Exhaustive Study of Electrical Conductivity in the MNb2−x TixO6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Exhaustive Study of Electrical Conductivity in the MNb2−x TixO6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Proton /oxygen ion conductivity ratio of Nd containing La10W2O21/γ-La6W2O15 tungstates

Synthesis and study of upconversion Lu2(WO4)3: Yb3+, Tm3+ nanoparticles synthesized by modified Pechini method

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Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites

Exhaustive Study of Electrical Conductivity in the MNb_2−xTixO_6–0.5x (M = Mg, Ca, Zn; x = 0, 0.1, 0.2) Columbites