Synthesis and electrical properties of a new fluorite-like anionic conductor in the Nd2O3–MoO3 system (43–47mol% Nd2O3)

Воронкова, В. И.; Kharitonova, E. P.; Белов, Д. А.

doi:10.1016/j.ssi.2012.03.002

Cited by 20 publications

(27 citation statements)

References 6 publications

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“…gr. Pn –3 n ), which possess mixed oxide‐ion/electronic conductivity . The feature of these compounds is that they easily lose oxygen under reducing conditions and their composition, in this case, is defined as Ln 5 Mo 3 O 16 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

et al. 2019

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Fluorite-like oxyfluorides NaLn 4 Mo 3 O 15 F (Ln = La, Pr, Nd), which relate to the Nd 5 Mo 3 O 16 structural type, were obtained by solid-phase synthesis in the air. Codoping of the Nd 5 Mo 3 O 16+δ family with sodium and fluorine led to the appearance of a piezoelectric effect and a reversible phase transition in oxyfluorides, accompanied by a jump in the conductivity and an anomaly of the permittivity of the ferroelectric type. It [a]

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Section: Introductionmentioning

confidence: 99%

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

et al. 2019

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“…The samples with high Pb content underwent a reversible first-order phase transition near 820°C. [6][7][8][9][10][11] Compounds with such a structure can be synthesized for Ln = La, Pr, Nd, Sm, and Gd under reducing conditions, [9] and only for Pr and Nd in air. In the region of the phase transition, the permittivity of the Pb-containing samples show a strong lambda-type anomaly and electrical conductivity increases…”

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confidence: 99%

“…XRD analysis revealed two tetragonal phases, the hightemperature centric phase (I4 1 /acd) and the low-temperature acentric phase (I42m). [6,7,10,11] The Ln 5 Mo 3 O 16+δ compounds were found to have mixed oxygen-ion/electronic conductivity, which opens up the possibility of using them in electrochemical devices. Many of these molybdates possess functional properties of practical interest.…”

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confidence: 99%

“…Many of these molybdates possess functional properties of practical interest. [6][7][8][9][10][11] Compounds with such a structure can be synthesized for Ln = La, Pr, Nd, Sm, and Gd under reducing conditions, [9] and only for Pr and Nd in air. [1] In 2000, Lacorre et al reported La 2 Mo 2 O 9 (1:2 compound) to have high oxygen-ion conductivity (0.06 S/cm at 800°C).…”

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confidence: 99%

“…Borchardt and Bierstedt found that the 1:3 compounds, Ln 2 (MoO 4 ) 3 , show ferroelectric properties. [6,7,10,11] The Ln 5 Mo 3 O 16+δ compounds were found to have mixed oxygen-ion/electronic conductivity, which opens up the possibility of using them in electrochemical devices. [2] In air, 1:2 compounds can only be synthesized for Ln = La and Pr.…”

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Phase Relations and Physical Properties of Layered Pb‐Containing Nd₂MoO₆ Compounds

et al. 2016

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The phase relations along the Nd 2 MoO 6 -PbO join of the ternary Nd 2 O 3 -MoO 3 -PbO system have been studied by means of solid-state synthesis in air. The samples with high Pb content underwent a reversible first-order phase transition near 820°C. XRD analysis revealed two tetragonal phases, the hightemperature centric phase (I4 1 /acd) and the low-temperature acentric phase (I42m). In the region of the phase transition, the permittivity of the Pb-containing samples show a strong lambda-type anomaly and electrical conductivity increasesIn the 1960s and 1970s, rare-earth molybdates of various compositions (1:3, 1:2, 5:6, and 1:1) were synthesized as Ln 2 O 3 -MoO 3 binary systems containing 25-50 mol-% Ln 2 O 3 . Many of these molybdates possess functional properties of practical interest. Borchardt and Bierstedt found that the 1:3 compounds, Ln 2 (MoO 4 ) 3 , show ferroelectric properties. [1] In 2000, Lacorre et al. reported La 2 Mo 2 O 9 (1:2 compound) to have high oxygen-ion conductivity (0.06 S/cm at 800°C). [2] In air, 1:2 compounds can only be synthesized for Ln = La and Pr. [2][3][4][5] A number of Ln 2 O 3 -MoO 3 systems have been found to contain Ln 5 Mo 3 O 16+δ compounds of variable composition with a fluorite-like cubic structure. [6][7][8][9][10][11] Compounds with such a structure can be synthesized for Ln = La, Pr, Nd, Sm, and Gd under reducing conditions, [9] and only for Pr and Nd in air. [6,7,10,11] The Ln 5 Mo 3 O 16+δ compounds were found to have mixed oxygen-ion/electronic conductivity, which opens up the possibility of using them in electrochemical devices. [9,10] At a slightly higher rare-earth content, 1:1 Ln 2 MoO 6 compounds, so-called oxymolybdates, [12][13][14] exist for all of the rare earths and have different structures depending on the ionic radius of the rare-earth element and the synthesis temperature.The structures and polymorphism of the oxymolybdates have been the subject of several studies. [12][13][14][15][16][17] The 1:1 molybdates have a tetragonal (La 2 MoO 6 -type) or monoclinic (Nd 2 WO 6type [18] ) structure depending on the ionic radius of the rareearth element and the synthesis temperature. The tetragonal layered structure of Ln 2 MoO 6 (Ln = La, Pr, Nd) compounds is [a]

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Valence state of europium and samarium in Ln2Hf2O7 (Ln = Eu, Sm) based oxygen ion conductors

Shlyakhtina

Лысков

Щеголихин

et al. 2021

Ceramics International

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Synthesis and electrical properties of a new fluorite-like anionic conductor in the Nd2O3–MoO3 system (43–47mol% Nd2O3)

Cited by 20 publications

References 6 publications

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

Phase Relations and Physical Properties of Layered Pb‐Containing Nd₂MoO₆ Compounds

Valence state of europium and samarium in Ln2Hf2O7 (Ln = Eu, Sm) based oxygen ion conductors

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Synthesis and electrical properties of a new fluorite-like anionic conductor in the Nd2O3–MoO3 system (43–47mol% Nd2O3)

Cited by 20 publications

References 6 publications

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd5Mo3O16 Type

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd5Mo3O16 Type

Phase Relations and Physical Properties of Layered Pb‐Containing Nd2MoO6 Compounds

Valence state of europium and samarium in Ln2Hf2O7 (Ln = Eu, Sm) based oxygen ion conductors

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Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

Effect of Sodium and Fluorine Co‐Doping on the Properties of Fluorite‐Like Rare‐Earth Molybdates of Nd₅Mo₃O₁₆ Type

Phase Relations and Physical Properties of Layered Pb‐Containing Nd₂MoO₆ Compounds