Results 11 to 20 of about 249 (115)

Strong Proton-Phonon Coupling Drives Fast Ion Transport in Perovskites. [PDF]

open access: yesAdv Sci (Weinh)
Experimental and computational phonon analysis of ABO3‐type proton conductor BaSnO3 shows that substitution on the B‐site with yttrium forms an imaginary phonon mode which is instrumental for the function as proton conductor. This overcompensates the adverse proton trapping effect of the yttrium.
Rulev A   +8 more
europepmc   +2 more sources

THE STUDY OF FLUORESCENT PROPERTIES OF CALCIUM STANNATE CASNO ACTIVATED WITH RARE EARTH METALS

open access: yesВестник Северо-Кавказского федерального университета, 2022
A series of prototypes CaSnO3, activated with Yb3+, Er3+, Ho3+, Tm3+ ions, synthesized by solid-phase method. X-ray diffraction analysis of the samples showed the presence of BaSnO3 phase with unit cell parameters characteristic of the orthorhombic ...
Ul'ana Mar'ina, Viktor Vorob'ev
doaj  

Oxygen ion and mixed conductivity in compounds with the fluorite and pyrochlore structure [PDF]

open access: yes, 1983
The effect of pyrochlore order in solid solutions with the defect fluorite structure was studied. The amount of order was changed by various heat treatments or by varying the cation composition.
Burggraaf, A.J.   +2 more
core   +2 more sources

SYNTHESIS AND STUDY OF LUMINESCENT PROPERTIES OF SYSTEM CaSnO3 : Yb3+, RE3+ (RE = Er, Ho, Tm)

open access: yesВестник Северо-Кавказского федерального университета, 2022
As an object of a research the luminescent system CaSnO3 : Yb3+, RE3+ where RE3+ - the rare-earth elements Er, Ho, Tm is used. The samples are by a solid-phase method at a temperature of 1 250 °C and duration of calcination of 18 hours synthesized. The X-
Uliana Mar'ina   +2 more
doaj  

H-1 NMR study of molecular dynamics and phase transitions in (CH3NH3) 2PbBr6 and [N(CH3)(4)](2)SeCl6. [PDF]

open access: yes, 1994
The proton spin-lattice relaxation time (T-1) has been measured in methylammonium hexabromoplumbate, (CH3NH3)(2)PbBr6, in the range 77-450K and tetramethylammonium (TMA) hexachloroselenate, [N(CH3)(4) ](2)SeCl6 in the range 77-430K In (CH3NH3)(2)PbBr6, T-
Murthy, B.V.S.   +4 more
core   +1 more source

Thermodynamics of hydration and oxidation in the proton conductor Gd-doped barium cerate from density functional theory calculations [PDF]

open access: yes, 2012
International audienceHydration and oxidation of gadolinium-doped barium cerate, a system with highly promising properties when used as electrolyte for protonic ceramic fuel cells, are investigated by means of density functional calculations.
Bottin, F.   +3 more
core   +3 more sources

Stability and solubility of members of tin perovskites in the schoenfliesite subgroup, □2(BSn4+)(OH,O)6 (B = Ca, Fe3+, Mg, Mn2+, Zn, Cu) [PDF]

open access: yes, 2021
In this work, we determined thermodynamic properties of a suite of tin perovskites □2(BSn4+)(OH,O)6 that correspond to the minerals burtite (B = Ca), jeanbandyite (Fe3+), schoenfliesite (Mg), wickmanite (Mn), vismirnovite (Zn), and mushistonite (Cu ...
Christensen, Helena Gorniak   +5 more
core   +1 more source

Structural disorder in (Bi,M)2(Fe,Mn,Bi)2O6+x (M = Na or K) pyrochlores seen from reverse Monte Carlo analysis of neutron total scattering [PDF]

open access: yes, 2017
The average structures of the polycrystalline pyrochlores (Na0.60Bi1.40)(Fe1.06Mn0.17Bi0.77)O6.87 and (K0.24Bi1.51)(Fe1.07Mn0.15Bi0.78)O6.86 can be refined through Rietveld refinement against Bragg scattering data using cubic space group Fd3 ̅m, with off-
Daniels, Luke M.   +3 more
core   +1 more source

Alkaline earth stannates applied in photocatalysis: prospection and review of literature

open access: yesCerâmica
The ABO3 mixed oxide class known for its perovskite-like structure has aroused great scientific and technological interest in recent decades, due to its optical, magnetic and conductive properties.
L. M. C. Honorio   +5 more
doaj   +1 more source

Turning ABO$_3$ antiferroelectrics into ferroelectrics: Design rules for practical rotation-driven ferroelectricity in double perovskites and A$_3$B$_2$O$_7$ Ruddlesden-Popper compounds

open access: yes, 2014
Ferroic transition metal oxides, which exhibit spontaneous elastic, electrical, magnetic or toroidal order, exhibit functional properties that find use in ultrastable solid-state memories to sensors and medical imaging technologies.
Aguado-Puente   +35 more
core   +1 more source

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