Ionic mobility in Pb0.9M0.1F2.1 (M = Bi, In) and Pb0.9Bi0.05In0.05F2.1 solid solutions with the fluorite-type structure according NMR data

2018 ◽  
Vol 59 (7) ◽  
Keyword(s):  
Solid Solutions ◽  
Ionic Mobility ◽  
Type Structure ◽  
Nmr Data ◽  
Fluorite Type

Ionic Mobility in Pb0.9M0.1F2.1 (M = Bi, In) and Pb0.9Bi0.05In0.05F2.1 Solid Solutions with the Fluorite-Type Structure According NMR Data

2018 ◽  
Vol 59 (7) ◽  
pp. 1572-1579 ◽  
Author(s):  
V. Ya. Kavun ◽  
E. B. Merkulov ◽  
A. B. Slobodyuk ◽  
M. M. Polyantsev ◽  
O. V. Brovkina
Keyword(s):  
Solid Solutions ◽  
Ionic Mobility ◽  
Type Structure ◽  
Nmr Data ◽  
Fluorite Type

NMR and complex impedance study of ionic motion in new Rb0.4Bi0.6–In F2.2 solid solutions with fluorite-type structure

2021 ◽  
Vol 360 ◽  
pp. 115545
Author(s):  
A.B. Slobodyuk ◽  
V.Ya. Kavun ◽  
N.F. Uvarov ◽  
E.B. Merkulov ◽  
M.M. Polyantsev
Keyword(s):  
Solid Solutions ◽  
Complex Impedance ◽  
Type Structure ◽  
Impedance Study ◽  
Ionic Motion ◽  
Fluorite Type

scholarly journals Phase Equilibrium in ZrO2-CeO2-Eu2O3 System at a Temperature of 1500 °C

2021 ◽  
Vol 03 (03) ◽  
pp. 1-1
Author(s):  
Oksana Kornienko ◽  
◽  
Anatoliy Sameljuk ◽  
Olena Andrievskaya ◽  
Serhii Yushkevych ◽  
...  
Keyword(s):  
Isothermal Section ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
Intermediate Phase ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Three Phase ◽  
Unit Cells ◽  
Fluorite Type ◽  
Pyrochlore Type

The phase equilibria and structural transformations in the ternary ZrO2-CeO2-Eu2O3 system at 1500 °C were studied by X-ray diffraction and scanning electron microscopy in the overall concentration range. The system was found to constitute fields of solid solutions based on the tetragonal (Т) modification of ZrО2, cubic (С) and monoclinic (B) modifications of Eu2O3, cubic with a fluorite-type structure (F) modifications of СеО2 (ZrО2), and ordered intermediate phase with a pyrochlore-type structure of Eu2Zr2O7 (Py). The refined lattice parameters of the unit cells corresponding to the solid solutions and microstructures of the definite field of compositions for the systems were determined. The peculiarity of the isothermal section of the phase diagram in the ZrO2-СеO2-Eu2O3 system at 1500 °С is the formation of phase equilibria on the basis of the fluorite solid solutions of ZrO2(CeO2) along with other components. There are at least three homogeneous fields of cubic phases. The isothermal section of the ZrO2-CeO2-Eu2O3 system at 1500 °С was constituted of four three-phase regions (C-Eu2O3 + F-CeO2+Py, C-Eu2O3 + F-ZrO2+Py, Py + F-ZrO2 + T-ZrO2, Py + F-CeO2 + T-ZrO2).

scholarly journals PHASE RELATION STUDIES IN THE CeO2-La2O3-Eu2O3 SYSTEM AT 1250 °С

2020 ◽  
Vol 86 (3) ◽  
pp. 35-47 ◽  
Author(s):  
Oksana Kornienko ◽  
Oleksandr Bykov ◽  
Аnatoliy Sameliuk ◽  
Yuri Yurchenko
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Binary Systems ◽  
Physicochemical Analysis ◽  
Lattice Parameters ◽  
Type Structure ◽  
Two Phase ◽  
Three Phase ◽  
Fluorite Type ◽  
Phase Sample

Using the methods of physicochemical analysis (XRD, petrography, scanning electron microscopy analyses) phase equilibria were firstly investigated in the ternary system СeO2–La2O3–Eu2O3 system at 1250 ºС. It was established that in the system there exist fields of solid solutions based on cubic with fluorite-type structure (F) and cubic (С) and monoclinic (B) modification Eu2O3 and hexagonal (A) modification of La2O3. No new phases were found. The refined lattice parameters of the unit cells for solid solutions for the systems were determined. The cubic ceria-based solid solution has a fluorite-type structure and homogeneity field shows the maximum extension. It forms solid solutions of substitution type with phases of binary systems. The boundary of the homogeneity field of F-phase is curved from the center of triangle toward the CeO2 corner and passes through appropriate points in the binary CeО2-Eu2O3(100-69 mol % CeO2) and CeO2–La2O3 (100-51 mol% CeO2) systems. The lattice parameters for F phase vary from  а = 0.5409 nm in pure СеО2toа = 0.5512 nm in two-phase sample (F + C) containing 55 mol % CeО2-22.5 mol % La2O3-22.5 mol % Eu2O3and to а = 0.5526 nm in  three-phase sample (F + В  + C) containing 40 mol % CeО2-30 mol % La2O3-30 mol % Eu2O3 and to а = 0.5532 nm in  three-phase sample (А + F + В) containing 30 mol % CeО2-35 mol % La2O3-35 mol % Eu2O3along the section CeO2 ( 50 mol % La2O3-35 mol % Eu2O3). The lattice parameters for F phase vary from  а = 0.5409 nm in pure СеО2 to а = 0.5444 nm nm in two-phase sample (F + C), containing 70 mol % CeО2-3 mol % La2O3-27 mol % Eu2O3and to а = 0.5465 nm in  three-phase sample (F + В  + C) containing 20 mol % CeО2-8 mol % La2O3-72 mol % Eu2O3. The homogeneity field of solid solution based on A-La2O3 extends to 17 mol % СеO2 and 20 mol % Eu2O3 in the corresponding binary systems and locates near the composition 5 mol % CeO2-90 mol % La2O3-5 mol % Eu2O3 on the section La2О3 - (50 mol % CeО2-50 mol % Eu2О3). The boundary of the homogeneity field of B- Eu2O3 phase passes through appropriate points in the binary CeО2-EuO3 (0-1 mol% CeO2) and–Eu2O3 (0-25 mol% La2O3) systems. The isothermal section of the CeO2– La2O3–Eu2O3 system at 1250°C contains four three-phase regions (A+F+B, F+B+C) and five two-phase regions (F+A, A+B, F+B, B+C, F+C).

Dielectric relaxation of free charge carriers in some fluorite-type solid solutions

1998 ◽  
Vol 244 ◽  
pp. 201-206 ◽  
Author(s):  
E.F. Hairetdinov ◽  
N.F. Uvarov ◽  
J.-M. Reau ◽  
P. Hagenmuller
Keyword(s):  
Dielectric Relaxation ◽  
Solid Solutions ◽  
Charge Carriers ◽  
Free Charge ◽  
Fluorite Type

Accommodation of multivalent cations in fluorite-type solid solutions: Case of Am-bearing UO2

2013 ◽  
Vol 434 (1-3) ◽  
pp. 7-16 ◽  
Author(s):  
Damien Prieur ◽  
Philippe Martin ◽  
Florent Lebreton ◽  
Thibaud Delahaye ◽  
Dipanjan Banerjee ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Fluorite Type
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