Eu3+-doped (Y0.5La0.5)2O3: new nanophosphor with the bixbyite cubic structure

Đorđević, Vesna; Nikolić, Marko G.; Bártová, Barbora; Krsmanović, Radenka; Antić, Željka; Dramićanin, Miroslav D.

doi:10.1007/s11051-012-1322-6

Cited by 7 publications

(1 citation statement)

References 33 publications

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“…206) when applying calcination temperatures above 1960 °C . The cubic bixbyite structure, which is closely related to the fluorite structure, is of general interest because it affords a high symmetric atomic ordering and materials with improved properties in various applications, e.g., photoluminescence materials or for solid electrolytes. , However, no investigations regarding the properties of the ternary cubic high-temperature phases RE 6 WO 12 (RE = Y, La–Yb except Ce, Pm, Eu, Tb, Tm) have been carried out, most probably due to the lack of economical viability and the difficulties in preparing the materials in the cubic bixbyite structure. , …”

Section: Introductionmentioning

confidence: 99%

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

et al. 2016

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Materials crystallizing in highly symmetric structures are of particular interest as they display superior physical properties in many relevant technological areas such as solid oxide fuels cells (SOFCs), catalysis, or photoluminescent materials. While the rare earth molybdenum oxides RE 6 MoO 12 with the large rare earth cations RE = La to Dy crystallize in a cubic defect fluorite structure type (Fm3̅ m, no. 225), the compounds with the smaller cations RE = Tm− Lu could hitherto only be synthesized in the rhombohedral defect fluorite structure type (R3̅ , no. 148). In the following, new low temperature access to the rare earth molybdenum oxides RE 6 MoO 12−δ (RE = Tm−Lu) crystallizing in the highly symmetric cubic bixbyite structure type (Ia3̅ , no. 206) will be discussed. The three-step method comprises preparation of the rhombohedral phases by solution combustion (SC) reactions, their reduction including simultaneous structural transitions from the rhombohedral to the cubic phases, and subsequent reoxidations while preserving their cubic structures. Detailed studies on this process were performed on the compound Yb 6 MoO 12−δ using TG-DTA, XPS, EDX, and X-ray powder diffraction (XRPD) measurements. In contrast to the rhombohedral phase Yb 6 MoO 12 , which does not show any ionic conductivity, the cubic bixbyite structured compound can be classified as a promising ionic conductor. Electrochemical impedance spectroscopy (EIS) revealed that bulk and grain boundary activation energy determined to be 144.6 kJ mol −1 and 150.4 kJ mol −1 , respectively, range in the same regime as the conventional ionic conductor 8-YSZ. Furthermore, the new cubic phase Yb 6 MoO 12−δ displays improved coloristic properties (UV−Vis spectroscopy) with a yellow hue value (CIE-Lab) being enhanced from b* = 26.0 of the rhombohedral to b* = 46.1 for the cubic phase, which is relevant for the field of inorganic pigments.

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Section: Introductionmentioning

confidence: 99%

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

et al. 2016

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Efficient and thermally stable red luminescence from nano-sized phosphor of Gd6MoO12:Eu3+

et al. 2013

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Photoluminescence of europium(III)-doped (Y Sc1−)2O3 nanoparticles: Linear relationship between structural and emission properties

Antić

Đorđević

Dramićanin

et al. 2016

Ceramics International

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Eu3+-doped (Y0.5La0.5)2O3: new nanophosphor with the bixbyite cubic structure

Cited by 7 publications

References 33 publications

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

Efficient and thermally stable red luminescence from nano-sized phosphor of Gd6MoO12:Eu3+

Photoluminescence of europium(III)-doped (Y Sc1−)2O3 nanoparticles: Linear relationship between structural and emission properties

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Eu3+-doped (Y0.5La0.5)2O3: new nanophosphor with the bixbyite cubic structure

Cited by 7 publications

References 33 publications

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE6MoO12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE6MoO12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

Efficient and thermally stable red luminescence from nano-sized phosphor of Gd6MoO12:Eu3+

Photoluminescence of europium(III)-doped (Y Sc1−)2O3 nanoparticles: Linear relationship between structural and emission properties

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Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors

Synthetic Access to Cubic Rare Earth Molybdenum Oxides RE₆MoO_12−δ(RE = Tm–Lu) Representing a New Class of Ion Conductors