kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2024-21-1-130-139kaz29-1030Research ArticleФИЗИЧЕСКИЕ НАУКИPHYSICAL SCIENCESВЛИЯНИЕ ВЫБОРА ИСХОДНОГО МАТЕРИАЛА НА ФАЗОВЫЙ СОСТАВ И ФАЗОВУЮ СТАБИЛЬНОСТЬ ЧАСТИЦ ZRO2, СИНТЕЗИРОВАННЫХ ГИДРОТЕРМАЛЬНЫМ МЕТОДОМTHE EFFECT OF THE CHOICE OF THE STARTING MATERIAL ON THE PHASE COMPOSITION AND PHASE STABILITY OF ZRO2 PARTICLES SYNTHESIZED BY THE HYDROTHERMAL METHODhttps://orcid.org/0000-0002-0759-4329ГаранинЮ. А.GaraninYu. A.

докторант

010000, г. Астана

050000, г. Алматы

Doctoral student

 

jorge.r2448@gmail.comЕвразийский национальный университет им. Л.Н. Гумилева; станинский филиал института ядерной физики; ТОО «Kazakhstan Advanced Science Research Center»КазахстанL.N. Gumilyov Eurasian National University; Astana Branch of the Institute of Nuclear Physics; «Kazakhstan Advanced Science Research Center» LLPKazakhstan202426032024211130139Copyright © Гаранин Ю.А., 20242024Гаранин Ю.А.Garanin Y.A.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/1030

В данной работе был исследован фазовый состав, микроструктура и фазовая стабильность образцов диоксида циркония, полученных методом гидротермального синтеза из разных исходных материалов. Установлено, что при использовании в качестве исходного материала ZrOCl2·8H2O образуются частицы диоксида циркония с содержанием моноклинной и тетрагональной (кубической) фазы, в то же время при использовании в качестве исходного материала ZrO(NO3)2·2H2O в образцах идентифицирована только моноклинная фаза. Размеры ОКР, рассчитанные с применением уравнения Шеррера, находятся в диапазоне от 9 до 40 нм. Анализ СЭМ-изображений экспериментальных образцов показал, что наночастицы образуют конгломераты с размерами в несколько микрон. Исследование фазовой стабильности t, с – ZrO2 фазы от температурного воздействия показало, что t, с – ZrO2 является метастабильной фазой с размерами ОКР до отжига 10 нм. При повышении температуры отжига происходит постепенная трансформация метастабильной t, с – ZrO2 в моноклинную, вследствие протекания процессов изменения поверхностой энергии и разрастания частиц, а также спекания конгломератов в более крупные монолитные частицы.

In this work, the phase composition, microstructure and phase stability of zirconium dioxide samples obtained by hydrothermal synthesis from various starting materials were investigated. It was found that when using ZrOCl2·8H2O as a starting material, zirconium dioxide particles containing monoclinic and tetragonal (cubic) phases are formed, at the same time, when using ZrO(NO3)2·2H2O as a starting material, only the monoclinic phase was identified in the samples. The CSR dimensions calculated using the Scherrer equation are in the range from 9 to 40 nm. Analysis of SEM images of experimental samples showed that nanoparticles form conglomerates with sizes of several microns. A study of the phase stability of the t, c – ZrO2 phase from temperature exposure showed that t, c – ZrO2 is a metastable phase with CSR sizes up to annealing of 10 nm. With an increase in the annealing temperature, the metastable tetragonal (cubic) phase of ZrO2 gradually transforms into a monoclinic one, due to the processes of minimizing surface energy and particle proliferation, as well as sintering conglomerates into larger monolithic particles.

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