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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">phmath</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Государственного университета просвещения. Серия: Физика-Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Federal State University of Education. Series: Physics and Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-5083</issn><issn pub-type="epub">2949-5067</issn><publisher><publisher-name>Federal State University of Education</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18384/2310-7251-2023-1-34-44</article-id><article-id custom-type="elpub" pub-id-type="custom">phmath-587</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Распространение звука в магнитных жидкостях на основе минеральных масел вблизи температуры стеклования дисперсионной среды</article-title><trans-title-group xml:lang="en"><trans-title>Sound propagation in magnetic fluids based on mineral oils near the glass transition temperature of the dispersion medium</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Паращук</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Parashchuk</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Паращук Никита Сергеевич – студент магистратуры Института лазерных и плазменных технологий Национального исследовательского ядерного университета «МИФИ»; младший научный сотрудник учебно-научной лаборатории теоретической и прикладной нанотехнологии Государственного университета просвещения; инженер Института общей физики имени А. М. Прохорова Российской академии наук</p><p>119991, г. Москва, ул. Вавилова, д. 38</p><p>141014, Московская область, г. Мытищи, ул. Веры Волошиной, д. 24</p><p>115409, г. Москва, Каширское шоссе, д. 31</p></bio><bio xml:lang="en"><p>Nikita S. Paraschuk – Master’s Degree Student, Institute of Laser and Plasma Technologies, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute); Research Assistant, Educational and Scientific Laboratory of Theoretical and Applied Nanotechnology, State University of Education; Engineer, Prokhorov General Physics Institute of the Russian Academy of Sciences</p><p>ulitsa Vavilova 38, Moscow 119991</p><p>ulitsa Very Voloshinoi 24, Mytishchi 141014, Moscow Region</p><p>Kashirskoe shosse 31, Moscow 115409,</p></bio><email xlink:type="simple">parashchuk.ns@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Курилов</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurilov</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курилов Александр Дмитриевич – заведующий учебно-научной лабораторией теоретической и прикладной нанотехнологии Государственного университета просвещения; и. о. младшего научного сотрудника Института общей физики имени А. М. Прохорова Российской академии наук</p><p>119991, г. Москва, ул. Вавилова, д. 38</p><p>141014, Московская область, г. Мытищи, ул. Веры Волошиной, д. 24</p></bio><bio xml:lang="en"><p>Alexander D. Kurilov – Laboratory Head, Educational and Scientific Laboratory of Theoretical and Applied Nanotechnology, State University of Education; Acting Research Assistant, Prokhorov General Physics Institute of the Russian Academy of Sciences</p><p>ulitsa Vavilova 38, Moscow 119991</p><p>ulitsa Very Voloshinoi 24, Mytishchi 141014, Moscow Region</p></bio><email xlink:type="simple">ad.kurilov@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чантурия</surname><given-names>Г. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Chanturiya</surname><given-names>G. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чантурия Георгий Темурович – студент магистратуры факультета информационных технологий, старший преподаватель кафедры цифровой экономики</p><p>125315, г. Москва, Ленинградский проспект, д. 80</p></bio><bio xml:lang="en"><p>Georgii T. Chanturiya – Master’s Degree Student, Faculty of Information Technology, Senior Lecturer, Department of Digital Economy, Moscow University for Industry and Finance “Synergy”</p><p>Leningradskii prospekt 80, Moscow 125315</p></bio><email xlink:type="simple">chnt.grg@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чаусов</surname><given-names>Д. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chausov</surname><given-names>D. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чаусов Денис Николаевич – доктор физико-математических наук, доцент, главный научный сотрудник учебно-научной лаборатории теоретической и прикладной нанотехнологии Государственного университета просвещения; и. о. заведующего лабораторией фотоники и органической электроники Института общей физики имени А. М. Прохорова Российской академии наук</p><p>119991, г. Москва, ул. Вавилова, д. 38</p><p>141014, Московская область, г. Мытищи, ул. Веры Волошиной, д. 24</p></bio><bio xml:lang="en"><p>Denis N. Chausov – Dr. Sci. (Phys.-Math.), Assoc. Prof., Leading Researcher, Educational and Scientific Laboratory of Theoretical and Applied Nanotechnology, State University of Education; Acting Laboratory Head, Laboratory of Photonics and Organic Electronics, Prokhorov General Physics Institute of the Russian Academy of Sciences</p><p>ulitsa Vavilova 38, Moscow 119991</p><p>ulitsa Very Voloshinoi 24, Mytishchi 141014, Moscow Region</p></bio><email xlink:type="simple">d.chausov@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт общей физики имени А. М. Прохорова Российской академии наук; Государственный университет просвещения; Национальный исследовательский ядерный университет «МИФИ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences; State University of Education; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт общей физики имени А. М. Прохорова Российской академии наук; Государственный университет просвещения</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Prokhorov General Physics Institute of the Russian Academy of Sciences; State University of Education</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Московский финансово-промышленный университет «Синергия»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow University for Industry and Finance “Synergy”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>28</day><month>04</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>34</fpage><lpage>44</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Паращук Н.С., Курилов А.Д., Чантурия Г.Т., Чаусов Д.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Паращук Н.С., Курилов А.Д., Чантурия Г.Т., Чаусов Д.Н.</copyright-holder><copyright-holder xml:lang="en">Parashchuk N.S., Kurilov A.D., Chanturiya G.T., Chausov D.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.physmathmgou.ru/jour/article/view/587">https://www.physmathmgou.ru/jour/article/view/587</self-uri><abstract><sec><title>Цель</title><p>Цель. Целью данной работы является установление зависимости влияния концентрации твёрдой фазы на акустические параметры магнитной жидкости на основе трансформаторного масла в широком диапазоне температур, в том числе вблизи точки стеклования дисперсионной среды.</p></sec><sec><title>Процедура и методы</title><p>Процедура и методы. Проведённые в данной работе исследования основаны на методах физической акустики, в частности импульсном методе переменного расстояния при внешнем температурном воздействии.</p></sec><sec><title>Результаты</title><p>Результаты. Исследованы температурные и концентрационные зависимости плотности, скорости и коэффициента поглощения ультразвуковых (далее – УЗ) волн. Проведено сравнение с основными теоретическими моделями и подходами. В области температур возле точки стеклования дисперсионной среды наблюдаются дополнительные эффекты, не описанные в литературных источниках и не согласующиеся с существующими на данный момент теориями распространения звука в дисперсных системах с большой разностью плотностей между жидкой и твердой фазой.</p></sec><sec><title>Теоретическая значимость</title><p>Теоретическая значимость. Научный и практический интерес представляет исследование ненамагниченных ферромагнитных коллоидов с высоким контрастом плотностей между фазами вблизи точки стеклования дисперсионной среды, так как в этой области температур наблюдается недостаточность исследований и, к тому же, возможны дополнительные эффекты, связанные со смещением фазового перехода на высоких концентрациях твердой фазы.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. The paper establishes the dependence of the influence of the concentration of the solid phase on the acoustic parameters of a magnetic fluid based on transformer oil in a wide temperature range, including the temperature close to the glass transition point of the dispersion medium.</p></sec><sec><title>Methodology</title><p>Methodology. The research is based on methods of physical acoustics and the pulse method of variable distance under external temperature influence in particular.</p></sec><sec><title>Results</title><p>Results. The temperature and concentration dependences of the density, velocity and absorption coefficient of ultrasonic waves are investigated. A comparison is performed with the main theoretical models and approaches. In the temperature range near the glass transition point of the dispersion medium, additional effects are observed that are not described in the literature and are inconsistent with the currently existing theories of sound propagation in dispersed systems with a large density difference between the liquid and solid phase.</p></sec><sec><title>Research implications</title><p>Research implications. Scientific and practical interest is due to the fact that the study of non-magnetized ferromagnetic colloids with a high contrast of densities between phases near the glass transition point of the dispersion medium is relevant, since there is a lack of research in this temperature range and, moreover, additional effects associated with the displacement of the phase transition at high concentrations of the solid phase are possible.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>акустическая спектроскопия</kwd><kwd>наноматериалы</kwd><kwd>ферромагнитные коллоиды</kwd><kwd>магнитная жидкость</kwd><kwd>дисперсные системы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>acoustic spectroscopy</kwd><kwd>nanomaterials</kwd><kwd>ferromagnetic colloids</kwd><kwd>magnetic fluid</kwd><kwd>dispersed systems</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Фонда содействия малому инновационному предпринимательству (ФАСИП) проекта УМНИК No 17639ГУ/2022.</funding-statement><funding-statement xml:lang="en">The work was supported by the Foundation for Assistance to Small Innovative Enterprises (FASIE) under the project UMNIK No. 17639GU/2022.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Dukhin A. 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