Synthesis and characterization of pyrochlore lanthanide (Pr, Sm) zirconate ceramics

Matović, Branko; Maletaškić, Jelena; Zagorac, Jelena; Pavkov, Vladimir; Maki, Ryosuke; Yoshida, Katsumi; Yano, Toyohiko

doi:10.1016/j.jeurceramsoc.2019.11.012

Cited by 14 publications

(2 citation statements)

References 27 publications

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“…Следующие стадии потери массы происходят с выделением газообразных H2O, NO, N2O, NO2, O2, зафиксированных масс-спектрометрически. Стоит отметить, что кристаллизация соединения -пик ДСК 560 °С -происходит при достаточно низкой температуре, в отличие от подобных материалов, синтезированных с использованием других методик [17][18][19], а на термограммах исходных нитратов отсутствует экзоэффект, описывающий кристаллизацию соединения при термической деструкции прекурсора. При этом для нитрата цирконила зафиксирован экзоэффект кристаллизации диоксида циркония ZrO2 при 470 °С [20], при этом ТГ и ДСК кривые для нитрата празеодима и нитрата цирконила, хорошо коррелируют с литературными данными [21,22], а образование и кристаллизация цирконата празеодима Pr2Zr2O7 может быть объяснена синергетическим эффектом при кристаллизации многокомпонентной системы.…”

Section: методика экспериментаunclassified

Praseodimum Zirconate: Phase Formation During Heat Treatmentand Electrochemicalbehavior

2022

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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Method has been described for the preparation of a complex oxide material of praseodym-ium zirconate using combustion synthesis with urea and nitrates of the corresponding metals. Dur-ing the work, a viscous homogeneous precursor was synthesized. In order to determine the charac-teristic temperatures of phase formation, the thermal behavior of the initial nitrates of praseodym-ium and zirconyl, as well as the obtained precursor, was investigated by methods of simultaneous thermal analysis combined with mass spectrometry of evolved gases. It was found that the formation and crystallization of the praseodymium zirconate phase occurs in the range of 360 -580 °С. The influence of the composition of the atmosphere on the thermal behavior of the precursor, as well as praseodymium and zirconyl nitrates, has been established. Thermal destruction of these sub-stances in an oxidizing atmosphere does not differ significantly from that in an inert atmosphere, but leads to a more rapid course of the formation of the oxide phase. During the thermal destruction of the precursor, the release of urea particles, nitrogen oxides, and carbon dioxide was detected by mass spectrometry. X-ray phase analysis of the sample annealed at 560 °Сfor 6 hshowed that the resulting material is completely single-phase and consists of praseodymium zirconate with a pyro-chlore structure type. The lattice parameter was a = 10.64754 Ǻ.The crystallinity value of the ob-tained powder was 65.1%. With a decrease in the time of heat treatment of the sample, its degree of crystallinity significantly decreases. Micrographs of the annealed sample show the presence of meso-and micropores in the microstructure of the material, formed as a result of thermal destruction of the precursor. The electrochemical behavior of the materialwas studied by cyclic voltammetry with different potential scan rates, and its specific capacity in a sodium sulfate so-lution was calculated.

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Section: методика экспериментаunclassified

Praseodimum Zirconate: Phase Formation During Heat Treatmentand Electrochemicalbehavior

2022

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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“…First, they are characterized by the stability of the physical and chemical behavior over a wide temperature range, biocompatibility, and mechanical hardness. The combination of these properties makes them promising candidates for a wide range of applications in mechanical engineering [ 14 , 15 , 16 ], medicine [ 17 , 18 ], sensing technology [ 19 , 20 ], anticounterfeiting [ 21 , 22 ], and others [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and Energy Transfer in Double- and Triple-Lanthanide-Doped YVO4 Nanoparticles

et al. 2022

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Optical materials doped with several lanthanides are unique in their properties and are widely used in various fields of science and technology. The study of these systems provides solutions for noncontact thermometry, bioimaging, sensing technology, and others. In this paper, we report on the demonstration of YVO4 nanoparticles doped with one, two, and three different rare earth ions (Tm3+, Er3+, and Nd3+). We discuss the morphology, structural properties, and luminescence behavior of particles. Luminescence decay kinetics reveal the energy transfer efficiency (up to 78%) for different ions under the selective excitation of individual ions. Thus, we found that the energy transition from Tm3+ is more favorable than from Er3+ while we did not observe any significant energy rearrangement in the samples under the excitation of Nd3+. The observed strong variation of REI lifetimes makes the suggested nanoparticles promising for luminescent labeling, anticounterfeiting, development of data storage systems, etc.

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Rare earth zirconate (Re2Zr2O7) ceramic nanomaterials

Teymourinia

2022

Advanced Rare Earth-Based Ceramic Nanomaterials

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Synthesis and characterization of pyrochlore lanthanide (Pr, Sm) zirconate ceramics

Cited by 14 publications

References 27 publications

Praseodimum Zirconate: Phase Formation During Heat Treatmentand Electrochemicalbehavior

Praseodimum Zirconate: Phase Formation During Heat Treatmentand Electrochemicalbehavior

Photoluminescence and Energy Transfer in Double- and Triple-Lanthanide-Doped YVO4 Nanoparticles

Rare earth zirconate (Re2Zr2O7) ceramic nanomaterials

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