Experimental Investigation of Phase Relations in the ZrO2-La2O3-Yb2O3 System

Ilatovskaia, Mariia; Sun, Shengdong; Saenko, Ivan; Savinykh, G.; Fabrichnaya, Olga

doi:10.1007/s11669-020-00790-9

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…Phase equilibria in the CeO2-Yb2O3 system at 1500 -600 °C: ○-single phase, ◑ two-phase samples [15] The study of phase equilibria in the La2O3-Yb2O3 system is presented in [22][23][24][25][26][27][28]. System La2O3-Yb2O3 is characterized by the presence of a minimum of ~ 2100 °C near the composition containing 50 mol % Yb2O3.…”

Section: Figmentioning

confidence: 99%

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Phase Equilibrium in the Ternary CeО2-La2O3-Yb2O3 System at 1500 °С

Kornienko

Yushkevych

Bykov

et al. 2022

SSP

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Materials based on cerium oxides and REE are perspective for use in medicine, energy and mechanical engineering due to the uniqueness of their authorities. Stationary system diagrams are the physicochemical basis for the creation of such materials as solid electrolytes for fuel comics, oxygen gas sensors, catalyst carriers, protected coatings for alloys, etc. In this work, phase equilibria and structural transformations in the system CeO2-La2O3-Yb2O3 at a temperature of 1500 oС in all international concentrations are investigated by the methods of microstistructural and X - ray phase analysis. It is established that in the triple system CeO2-La2O3-Yb2O3 fields of solid solutions based on cubic (F) modification of the structure of the structure of fluorite CeO2, monoclinic (B) and cubic (C) modification of Yb2O3 and hexagonal (A) modification of La2O3 (R) are used, which crystallizes in a Perovski-type structure with rhombic curvatures. It was found that the rarefaction of CeO2 in the crystal lattice of the ordered phase with the structure of the perovskite type LaYbO3 (R) is ~ 3 mol. %. Isothermal review of the state diagram of the systems CeO2-La2O3-Yb2O3 at reveals the presence of two three-phase (F + C + R), (A + R + F) and five two-phase (A + F), (A + R), (R + C), (F + R), (F + C) regions.

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Section: Figmentioning

confidence: 99%

“…Phase equilibria in binary systems with cerium oxides and oxides of rare earth elements have been studied in full [13][14][15][16][17][18][19][20][21][22][23]. There is no information on phase equilibria in the ternary system CeO2-La2O3-Yb2O3 in the literature.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibrium in the Ternary CeО2-La2O3-Yb2O3 System at 1500 °С

Kornienko

Yushkevych

Bykov

et al. 2022

SSP

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“…. 2.29 Phase diagram for the Yb 2 O 3 −ZrO 2 binary system, from [82]. Each region represents a structure or solid solution within a certain symmetry class: M = monoclinic, Flu = fluorite, Tet = tetragonal, C = cubic, δ = rhombohedral δ-phase, H = hexagonal, L = liquid.…”

Section: Acknowledgementsmentioning

confidence: 99%

Synthesis, structure and magnetic properties of the series of compounds Yb2ZrxTi2xO7

Lieberich

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The series of novel compounds Yb 2 Zr x Ti 2−x O 7 , with composition ranging from x = 0.0 to x = 2.0, were synthesized by the solid-state reaction and by the sol-gel method. The structures of the compounds were investigated using x-ray diffraction, Raman spectroscopy and electron microscopy. Pure phase samples could not be synthesized by the solid-state reaction, except for Yb 2 Ti 2 O 7 . The sol-gel samples did form pure phases, although with an increased degree of structural disorder. Along the Yb 2 Zr x Ti 2−x O 7 series the structure ranges from an ordered pyrochlore, for x ≤ 0.5, to a disordered fluorite, for x = 1.0, 1.5, and finally to the rhombohedral δ-phase, for x = 2.0. The morphotropic transition from pyrochlore to fluorite occurs in the range 0.5 < x < 1.0, somewhat less than the value predicted by the structural tolerance factor, x = 1.21. The intermediate compositions, close to the morphotropic phase boundary, exhibit either structural distortions or short-range local order that does not extend to the long-range crystal structure. Low temperature magnetization and AC magnetic susceptibility measurements were used to characterize the magnetic ground state of these magnetically frustrated compounds. The transition to long range magnetic order is suppressed with increasing structural disorder, suggesting an increase in magnetic frustration and possible stabilization of a spin liquid ground state for Yb 2 Zr 2 O 7 .

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Experimental study of isothermal sections of the ZrO2–HfO2–Eu2O3 ternary diagram at 1500 °С and 1700 °С

Yurchenko,

Kornienko,

Olifan

et al. 2024

Calphad

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Experimental Investigation of Phase Relations in the ZrO2-La2O3-Yb2O3 System

Cited by 14 publications

References 32 publications

Phase Equilibrium in the Ternary CeО<sub>2</sub>-La<sub>2</sub>O<sub>3</sub>-Yb<sub>2</sub>O<sub>3</sub> System at 1500 °С

Phase Equilibrium in the Ternary CeО<sub>2</sub>-La<sub>2</sub>O<sub>3</sub>-Yb<sub>2</sub>O<sub>3</sub> System at 1500 °С

Synthesis, structure and magnetic properties of the series of compounds Yb2ZrxTi2xO7

Experimental study of isothermal sections of the ZrO2–HfO2–Eu2O3 ternary diagram at 1500 °С and 1700 °С

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