| Title |
Нобелиймен белсендірілген cтронций алюминатының (SR4-X-Y CAY AL14 O25:NOX) синтезі мен оптикалық қасиеті |
| Translation of Title |
Synthesis and optical properties of Nobelium-activated stronium aluminate (SR4-X-Y CAY AL14 O25:NOX). |
| Translation of Title |
Синтез и оптические свойства алюмината стронция, активированного Нобелием (SR4-X-Y CAY AL14 O25:NOX). |
| Authors |
Pazylbek, Sapargali |
| DOI |
10.55452/1998-6688-2025-22-2-290-300 |
| Full Text |
|
| Is Part of |
Herald of the Kazakh-British Technical University.. Kazakh-British Technical University. 2025, vol. 22, iss. 2, p. 290-300.. ISSN 1998-6688. eISSN 2959-8109 |
| Keywords [eng] |
luminescence ; SEM ; sol-gel method ; strontium aluminate ; XRD |
| Abstract [eng] |
Nobelium-activated strontium aluminate (Sr4-x-y Cay Al14 O25:Nox) was synthesized using boric acid by the sol-gel method in different concentrations. The samples obtained were heated in air at various temperatures, using the results of X-ray diffraction (XRD) analysis, it was found that Sr4 Al14 O25 is single-phase at 1300°C. For partial replacement of strontium ions with calcium ions, the same strontium aluminate containing 0.04 mol/g of Nobelium was selected, and single-phase samples were obtained from a calcium concentration up to xCa =0,9. The highest relative intensity of the luminescence of Ho3+ ions in all samples was in the red zone of the spectrum, corresponding to the passage of these ions5F5 →5I8 . In photoluminescence studies of samples, when excited by radiation with wavelengths of 465 nm and 560 nm, the maximum light emission of ~652 nm,~692 nm, and ~694 nm were formed. In all series of synthesized single-phase materials, the most intense light emission peaks are in the compound that exchanges Sr2+ strontium ions with Ca2+ ions. From the images taken using a scanning electron microscope (SEM), it can be seen that Sr4-x Al14 O25:Hox particles are stuck together in monolithic blocks due to the use of extremely high heating temperatures. Although the synthesis of strontium replacement with calcium was carried out at the same temperature, changes in morphology were observed, and the hexagonal shape of aluminate particles partially replaced by Ca2+ ions was clearly visible. |
| Published |
Kazakh-British Technical University |
| Type |
Journal article |
| Publication date |
2025 |
| CC license |
|
