New Solid Solutions of Ca3 – 1.5xErx□0.5xB2SiO8: Synthesis, Phase Transition under the Influence of Isomorphic Substitutions and Temperature, Thermal Expansion, and Luminescent Properties of Polymorphs

Yukhno, Valentina A.; Поволоцкий, А. В.; Krzhizhanovskaya, Maria G.; Kolesnikov, Ilya E.; Бубнова, Р. С.

doi:10.1134/s1087659620050132

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…can be observed. Splitting of a multiplet of 7FJ corresponds to the rule of intervals of Lande: the distance between levels with J and J+1 increases with increase in J, for example, the peak corresponding to transition 5D0→7F0 is located very close to 5D0→7F1, however the peak corresponding to transition 5D0→7F6 lies more than 50 nanometers further in IR the region, than 5D0→7F5 Change of a crystal basis, also leads to the shift of peaks that indicates stronger influence of the crystal field [11,16,17]. Crystalline europium (III) hydroxide, calcined at the temperature of the second endoeffect -280 °C, has: spatial group -hexogonal modification -P63/m; a=b=6.39, c=3.6582, α= β=90º, γ=120º; Z=2; Rrentgen.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, structure and luminescent properties of co-precipitated europium and aluminum hydroxides

Bugaets

Kaygorodova

Bugaets

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The big relevance is acquired by issues of development of methods of receiving phosphors, and studying influence on their spectral characteristics of features of structure. Red phosphors which part compounds of europium are of particular interest. Ions of europium have such properties as rather big difference of energy between its resonant and the main levels, providing radiation in the visible range; not degeneracy of these levels; the most important transitions are poorly subject to effect of the crystal field; a good possibility of the theoretical description of the processes happening in the materials containing europium ions. Ranges of a luminescence of the system received by continuous joint sedimentation of hydroxides (CDH) of europium and aluminum at a stage of crystallization of amorphous products are measured. The complex research of the CDH system is conducted by methods of the physicochemical analysis: differential and thermal, IK-spectroscopic, X-ray phase, X-ray fluorescent, power dispersive. The dependence of intensity of a luminescence of a system, from synthesis conditions is analyzed: concentration of initial components, structures of firm phases, temperatures, time (after a year of aging).

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Section: Resultsmentioning

confidence: 99%

Synthesis, structure and luminescent properties of co-precipitated europium and aluminum hydroxides

Bugaets

Kaygorodova

Bugaets

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Synthesis of aluminium magnesium spinel nanopowders doped with europium ions (3 +) by the method of co-precipitation of hydroxocarbonates requires an additional stageultrasonic treatment [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and physico-chemical study of systems of co-precipitated Eu/Me hydroxides

Bugaets,

Kaygorodova,

Bugaets

et al. 2023

E3S Web of Conf.

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The level of scientific and technical progress is determined in many respects by inorganic materials – phosphors, sorbents, catalysts, aluminates, chromates, ferrite. The luminescing materials are widely used in medicine, criminalistics, agriculture, in various industries. It creates prerequisites for improvement of methods of receiving phosphors and further research of influence of features of structure of firm phases of materials on their spectral properties. Initial substances for synthesis, the leading role belongs to oxides, hydroxides and systems on their basis. Red phosphors which part compounds of europium are of particular interest. The systems of in the common besieged hydroxides (CBH) received continuous sedimentation of water solutions of nitrates of Eu (III) and AI(III), Fe(III), Cr(III) alkali. The SOG systems were studied by methods of the physical and chemical analysis: differential and thermal, IR-spectroscopic, X-ray phase, X-ray fluorescent, power dispersive. Registration, the emitted luminescent radiation of Eu3+ in a system, in the field of 741.4-746.9 nanometers were carried out at a stage of crystallization of amorphous products. The dependence of intensity of a luminescence of systems on synthesis conditions was established.

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New Solid Solutions of Ca3 – 1.5xErx□0.5xB2SiO8: Synthesis, Phase Transition under the Influence of Isomorphic Substitutions and Temperature, Thermal Expansion, and Luminescent Properties of Polymorphs

Cited by 2 publications

References 23 publications

Synthesis, structure and luminescent properties of co-precipitated europium and aluminum hydroxides

Synthesis, structure and luminescent properties of co-precipitated europium and aluminum hydroxides

Synthesis and physico-chemical study of systems of co-precipitated Eu/Me hydroxides

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