vestniktgasuВестник Томского государственного архитектурно-строительного университетаVestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture1607-18592310-0044Tomsk State University of Architecture and Building10.31675/1607-1859-2026-28-4-242-254VVJASQvestniktgasu-2587Research ArticleСТРОИТЕЛЬНЫЕ МАТЕРИАЛЫ И ИЗДЕЛИЯCONSTRUCTION MATERIALS AND PRODUCTSВлияние ZRO2 на процесс формирования керамического композита на основе муллита при плазменном синтезеZrO2 Effect on Mullite Ceramic Composition Obtained in Plasma SynthesisШеховцовВ. В.ShekhovtsovV. V.

Валентин Валерьевич Шеховцов, канд. техн. наук

634003; пл. Соляная, 2; Томск

Valentin V. Shekhovtsov, PhD, Assistant Lecturer

634003; 2, Solyanaya Sq.; Tomsk

shehovcov2010@yandex.ruЛитовкоА. В.LitovkoA. V.

Анастасия Вадимовна Литовко, студентка

634003; пл. Соляная, 2; Томск

Anastasia V. Litovko, Student

634003; 2, Solyanaya Sq.; Tomsk

litovkoanastasia@yandex.ruТомский государственный архитектурно-строительный университетРоссияTomsk State University of Architecture and BuildingRussian Federation202602092026284242254Copyright © Шеховцов В.В., Литовко А.В., 20262026Шеховцов В.В., Литовко А.В.Shekhovtsov V.V., Litovko A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.tsuab.ru/jour/article/view/2587

   Актуальность исследования обусловлена необходимостью решения научно-технической задачи – разработки перспективных муллитсодержащих материалов для высокотемпературных применений в экстремальных условиях энергетического воздействия.

   Целью работы является исследование влияния концентрации ZrO2 (5–20 масс. %) на фазовый состав и микроструктуру муллитовых композитов, полученных плазменным методом.

   Результаты. Экспериментально установлены параметры плазменно-дугового синтеза композитов на основе муллита, армированных диоксидом циркония. Методами рентгеновской микротомографии и ИК-спектроскопии выявлен механизм стабилизации тетрагональной фазы ZrO2 (характерная полоса ∼570 см–1) при содержании оксида 15–20 масс. % и силе тока 120 А, что сопровождается локальными искажениями кристаллической решетки муллита вследствие внедрения ионов Zr4+. Показано, что увеличение доли ZrO2 с 5 до 20 масс. % приводит к переходу от плотных игольчатых кристаллов к полым разветвленным волокнам с внутренними каналами. Полученные результаты имеют практическое значение для создания энергоэффективных огнеупорных и теплоизоляционных керамических материалов.

   The study addresses a scientific and technical challenge of developing promising mullite-containing materials for high-temperature applications under extreme energy conditions.

   Purpose

   Purpose: The aim of the work is to investigate the effect of the ZrO2 addition (5 to 20 wt. %) on the phase composition and microstructure of mullite composites produced by plasma synthesis.

   Methodology/approach

   Methodology/approach: X-ray microtomography and IR spectroscopy show stabilization of the tetragonal phase ZrO2 (characteristic band ∼570 cm–1) at the ZrO2 content of 15–20 wt. % and 120 A current, which is accompanied by local distortions of the mullite crystal lattice due to Zr4+ introduction.

   Research findings

   Research findings: Parameters of arc plasma synthesis are experimentally determined for the mullite ceramic composition with the addition of zirconium dioxide. It is found that an increase in the ZrO2 content from 5 to 20 wt. % leads to a transition from dense acicular crystals to hollow branched fiber with internal channels.

   Practical implication

   Practical implication: The obtained results can be used to create energy-efficient refractory and thermal insulating ceramic materials.

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