kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2025-22-2-290-300kaz29-2009Research ArticleФИЗИЧЕСКИЕ НАУКИPHYSICAL SCIENCESСИНТЕЗ И ОПТИЧЕСКИЕ СВОЙСТВА АЛЮМИНАТА СТРОНЦИЯ, АКТИВИРОВАННОГО НОБЕЛИЕМ (SR4-X-Y CAYAL14O25:NO X )SYNTHESIS AND OPTICAL PROPERTIES OF NOBELIUM-ACTIVATED STRONIUM ALUMINATE (SR4-X-Y CAYAL14O25:NO X )https://orcid.org/0000-0002-2318-9155ПазылбекС. А.PazylbekS.

PhD., ассоц. профессор

г. Шымкент

г. Вильнюс

 

PhD, Associate Professor 

Shymkent

Vilnius

sapargali.pa@gmail.comУниверситет им. Ж.А. Ташенева; Вильнюсский университетКазахстанTashenev University; Vilnius UniversityKazakhstan202506072025222290300Copyright © Пазылбек С.А., 20252025Пазылбек С.А.Pazylbek S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.kbtu.edu.kz/jour/article/view/2009

Активированный нобелием алюминат стронция (Sr4-x-y CayAl14O25:Nox) был синтезирован с применением борной кислоты с помощью золь-гелевого метода в разных концентрациях. Синтезированные образцы нагревали в воздухе при разных температурах и по результатам рентгенодифракционного (XRD) анализа получали однофазный Sr4Al14O25 при 1300 °C. Для частичной замены ионов стронция ионами кальция был выбран тот же алюминат стронция, содержащий 0,04 моль/г нобелия, а однофазные образцы были получены из концентрации кальция до xCa=0,9. Самая высокая относительная интенсивность люминесценции ионов Ho3+ во всех образцах находилась в красной зоне спектра в соответствии с прохождением этих ионов 5F5→5I8. В фотолюминесцентных исследованиях образцов при возбуждении излучением с длинами волн 465 нм и 560 нм образовались максимумы излучения света ~652 нм и ~692 нм, ~694 нм. Во всех сериях синтезированных однофазных материалов наиболее интенсивные пики излучения находятся в соединении, где Sr2+ обменивает ионы стронция с ионами Са2+. На снимках, сделанных с помощью сканирующего электронного микроскопа (СЭМ), видно, что частицы Sr4-xAl14O25:Hox слипаются в монолитные блоки из-за использования сверхвысокой температуры нагрева. Хотя синтез замещения стронция кальцием проводился при той же температуре, было замечено, что в морфологии происходят изменения, и гексагональная форма алюминатных частиц, частично замещенных ионами Са2+, была очевидна.

Nobelium-activated strontium aluminate (Sr4-x-y CayAl14O25:Nox)was synthesized using boric acid by the solgel 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 Sr4Al14O25 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 ions 5F5→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-xAl14O25: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.

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The authors declare that there are no conflicts of interest present.