The aim of the study was to develop microwave synthesis of luminescent yttrium oxide powders doped with ytterbium and erbium ions (Y2O3:Yb3+, Er3+) in the process of homogeneous precipitation from a reaction mixture of yttrium, ytterbium and erbium chlorides. The characteristics of the obtained powders were studied by X-ray diffraction, scanning and passing electron microscopy, differential thermal analysis, IR spectroscopy and photoluminescence under IR excitation. From luminescence spectra of Y2O3:Yb3+, Er3+ samples obtained by excitation with an IR laser at a wavelength of 975 nm, it can be concluded that when the calcination temperature of the sample’s changes, the radiation color of powders changes from green to red, which can be used to produce phosphors of different colors.
| Mualliflar | Е. Н. Подденежный, А. А. Бойко, О. В. Давыдова, Ekaterina E TRUSOVA |
|---|---|
| Jurnal | Kimyo va kimyo texnologiyasi |
| Nashr sanasi | 2024-07-03 |
| Jild | 2024 |
| Son | 2 |
| Til | en |
| DOI | 10.70189/1992-9498.1623 |
DOI: 10.70189/1992-9498.1623 · Maqolaning asl sahifasi · PDF
Coordination competing donor centers, electronic and geometric structures of the 4-amino-2-mercaptobenzimidazole ligand molecule were studied using quantum chemical calculation by the DFT / 6-31G method (d, p). It was…
The aim of the study is to determine the strength of the developed glass ionomer cements. As a powder of glass ionomer cements, glasses obtained in the SiO2-Al2O3-CaO-ZnO-P2O5-CaF2 system were used. The synthesized…
The purpose of this research work is for the first time the synthesis of the corresponding acetylene alcohols based on the alkynylation reaction of isolated benzaldehyde and its R-substituted derivatives in the BuLi/TGF…
The aim of this work is to study the influence of the granulometric composition of dolomite and limestone of 0.1–1.0 mm, 1.0–1.6 mm, 1.6–2.5 mm fractions on the rate of glass formation processes in the synthesis of…
In this work the vinylation reactions of aromatic carboxylic acids with vinyl acetate, which contain various substituents, in the presence of 2-chloro-4,6-dimethoxy-1,3,5-triazine were studied for the first time. The…
The purpose of the study is to develop a new catalytic system for the synthesis of internal acetylene alcohols from the Sonogastric coupling reaction of terminal acetylene alcohols and benzolchloride. For the first time…
The purpose of the research is to study the adsorption properties and mineralogical structure of alkaline earth bentonites from the Navbakhor deposit, as well as to develop technological regimes for their acid…
The purpose of this study is to obtain an extract of Astragalus turkestanus with a high content of biologically active substances and the lowest content of associated substances. The factors influencing the process of…
The purpose of this paper is to investigate the process of aminolysis of secondary polyethylene terephthalate with monoethanolamine at low ratio. The effect of the amount of monoethanolamine on the physical and chemical…
The aim of the work is to improve the process of coarse grinding of clay raw materials in the manufacture of ceramic products. To achieve this goal, a comparison was made of existing machines - disintegrator rollers…