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Nanosystems: Phys. Chem. Math., 2024, 15 (1), 115–121

Synthesis of strontium fluoride nanoparticles in a microreactor with intensely swirling flows

Rufat Sh. Abiev – Institute of Silicate Chemistry I. V. Grebenshchikov RAS, St. Petersburg; St. Petersburg State Institute of Technology, St. Petersburg, Russia
Andrey V. Zdravkov – Institute of Silicate Chemistry I. V. Grebenshchikov RAS, St. Petersburg, Russia
Yuliya S. Kudryashova – Institute of Silicate Chemistry I. V. Grebenshchikov RAS, St. Petersburg, Russia
Alexander A. Alexandrov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Sergey V. Kuznetsov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
Pavel P. Fedorov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia

Corresponding author: Pavel P. Fedorov, ppfedorov@yandex.ru

DOI 10.17586/2220-8054-2024-15-1-115-121

ABSTRACT The technique of micromixing was used for synthesis of SrF2 nanopowders in a microreactor with intensely swirling flows. The chemical reaction between aqueous solutions of strontium nitrate (C(Sr(NO3)2) = 0.15 – 0.45 M) and potassium fluoride (C(KF) = 0.3 – 0.9 M) was realized in a microreactor with intensely swirling flows with reagent consumption 1.5 – 3.5 L/min. Colloidal solutions were obtained, during the settling of which SrF2 powders were isolated without crystallographic faceting. An increase in the rate of reagent flow has negligible effect on the size of coherent scattering regions D, while an increase in the concentration of solutions leads to an increase in D from ∼ 20 to ∼ 30 nm.

KEYWORDS strontium fluoride, precipitation, chemical reaction, micromixing

ACKNOWLEDGEMENTS This work was done as a part of State assignment of the Institute of Silicate Chemistry (Project No. 1021050501070-0-1.4.3 (0081-2022-0006)) and Prokhorov General Physics Institute RAS (Project No. 0097-2019-0017). The study was carried out using the equipment of the Collective Use Centers of Prokhorov General Physics Institute RAS and Kurnakov Institute of General and Inorganic Chemistry RAS.

FOR CITATION Abiev R.Sh., Zdravkov A.V., Kudryashova Yu.S., Alexandrov A.A., Kuznetsov S.V., Fedorov P.P. Synthesis of strontium fluoride nanoparticles in a microreactor with intensely swirling flows. Nanosystems: Phys. Chem. Math., 2024, 15 (1), 115–121.

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[In Russian] Р.Ш. Абиев, А.В. Здравков, Ю.С. Кудряшова, А.А. Александров, С.В. Кузнецов, П.П. Фёдоров

Синтез наночастиц фторида стронция в микрореакторе с интенсивно закрученными потоками

АННОТАЦИЯ Метод микроперемешивания использован для синтеза нанопорошков SrF2 в микрореакторе с интенсивно закрученными потоками. Химическую реакцию между водными растворами нитрата стронция (C(Sr(NO3)2) = 0.15 – 0.45 M) и фторида калия (CmKF = 0,3-0,9М) проводили в микрореакторе с интенсивно закрученными потоками. Расход реагента составлял 1,5-3,5 л/мин. Были получены коллоидные растворы, при отстаивании которых были выделены порошки SrF2. Частицы не имеют кристаллографической огранки. Увеличение скорости потока реагента мало влияет на размер областей когерентного рассеяния D, тогда как увеличение концентрации растворов приводит к увеличению D от ~ 20 до ~ 30 нм.

КЛЮЧЕВЫЕ СЛОВА фторид стронция, осаждение, химическая реакция, микроперемешивание

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