zldmЗаводская лаборатория. Диагностика материаловIndustrial laboratory. Diagnostics of materials1028-68612588-0187ООО «Издательство «ТЕСТ-ЗЛ»10.26896/1028-6861-2025-91-9-36-43zldm-2590Research ArticleИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. ФИЗИЧЕСКИЕ МЕТОДЫ ИССЛЕДОВАНИЯ И КОНТРОЛЯTESTING OF STRUCTURE AND PARAMETERS. PHYSICAL METHODS OF TESTING AND QUALITY CONTROLИсследование влияния параметров размола и центрифугирования на размер частиц и отделение агломератов оксида алюминияStudy of influence of grinding and centrifugation parameters on the particle size and separation of agglomerates of aluminum oxideАтопшевА. А.AtopshevA. A.

Андрей Анатольевич Атопшев

603022, г. Нижний Новгород, просп. Гагарина, д. 23

Andrey A. Atopshev

23, prosp. Gagarina, Nizhny Novgorod, 603022

andrei9914@gmail.comБолдинМ. С.BoldinM. S.

Максим Сергеевич Болдин

603022, г. Нижний Новгород, просп. Гагарина, д. 23

Maxim S. Boldin

23, prosp. Gagarina, Nizhny Novgorod, 603022

НазмутдиновМ. Д.NazmutdinovM. D.

Марсель Дамирович Назмутдинов

603022, г. Нижний Новгород, просп. Гагарина, д. 23

Marsel D. Nazmutdinov

23, prosp. Gagarina, Nizhny Novgorod, 603022

ПоздоваТ. С.PozdovaT. S.

Татьяна Сергеевна Поздова

603022, г. Нижний Новгород, просп. Гагарина, д. 23

Tatyana S. Pozdova

23, prosp. Gagarina, Nizhny Novgorod, 603022

Университет ЛобачевскогоРоссияLobachevsky UniversityRussian Federation2025250920259193643Copyright © Атопшев А.А., Болдин М.С., Назмутдинов М.Д., Поздова Т.С., 20252025Атопшев А.А., Болдин М.С., Назмутдинов М.Д., Поздова Т.С.Atopshev A.A., Boldin M.S., Nazmutdinov M.D., Pozdova T.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.zldm.ru/jour/article/view/2590

При использовании керамической технологии могут формироваться жесткие агломераты частиц, препятствующие однородному спеканию и получению керамик высокой плотности. В работе представлены результаты исследования порошка α-Al2O3. Основное внимание уделяли влиянию параметров размола и центрифугирования на конечный размер частиц при добавлении NH4OH для электростатической стабилизации, препятствующей их агломерации. Анализ зависимости выхода центрифугата от условий центрифугирования (числа оборотов, содержания α-Al2O3) позволяет оптимизировать технологические параметры для достижения условий наибольшего выхода частиц заданного размера. Размер частиц оценивали методом динамического рассеяния света, который дает возможность определять также распределение частиц по размерам, что необходимо для исследования свойств материала. Кроме того, было рассчитано время размола, необходимое для достижения размера частиц в 0,4 мкм, определено значение константы скорости измельчения. Дополнительно для частиц размером около 0,4 мкм оценивали выполнение условия седиментационно-диффузионного равновесия без применения центрифугирования. Полученные результаты могут быть использованы для совершенствования методов получения высококачественного порошка α-Al2O3, который широко применяют в различных отраслях промышленности (при производстве керамики, электроники, катализаторов и др.).

Using ceramic technology can lead to the formation of rigid agglomerates of particles, which hinder uniform sintering and the production of high-density ceramics. This work presents the results of a study on α-Al2O3 powder. The main focus was on the influence of milling and centrifugation parameters on the final particle size when adding NH4OH for electrostatic stabilization, which prevents agglomeration. The analysis of the dependence of the centrifugate yield on centrifugation conditions (number of revolutions, content of α-Al2O3) allows for the optimization of technological parameters to achieve conditions for the highest yield of particles of a specified size. Particle size was assessed using dynamic light scattering, which also enables the determination of the particle size distribution, necessary for studying material properties. Additionally, the grinding time required to achieve a particle size of 0.4 μm was calculated, and the value of the grinding rate constant was determined. Furthermore, for particles around 0.4 μm in size, the fulfillment of sedimentation-diffusion equilibrium without centrifugation was evaluated. The obtained results can be used to improve methods for producing high-quality α-Al2O3 powder, which is widely used in various industries (in the production of ceramics, electronics, catalysts, etc.).

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