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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2023-14-6-690-698</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-166</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="en"><subject>CHEMISTRY AND MATERIALS SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И НАУКА О МАТЕРИАЛАХ</subject></subj-group></article-categories><title-group><article-title>Optical glass-ceramics based on Fe2+: MgAl2O2 nanocrystals and nucleated by TiO2 and ZrO2</article-title><trans-title-group xml:lang="ru"><trans-title>Оптические стеклокристаллические материалы на основе наокристаллов Fe2+:MgAl2O2, содержащие TiO2 и ZrO2 в качестве нуклеаторов кристаллизации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-3752-0722</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Букина</surname><given-names>В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bukina</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Vasilisa S. Bukina</p><p>36 Babushkina St., St. Petersburg, 192171</p></bio><email xlink:type="simple">nakara.orihara@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1980-0561</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дымшиц</surname><given-names>O.</given-names></name><name name-style="western" xml:lang="en"><surname>Dymshits</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Olga S. Dymshits</p><p>36 Babushkina St., St. Petersburg, 192171</p><p>26 Politekhnicheskaya, St Petersburg, 194021</p></bio><email xlink:type="simple">vodym1959@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>Алексеева</surname><given-names>И.</given-names></name><name name-style="western" xml:lang="en"><surname>Alekseeva</surname><given-names>I. P.</given-names></name></name-alternatives><bio xml:lang="en"><p>Irina P. Alekseeva</p><p>36 Babushkina St., St. Petersburg, 192171</p></bio><email xlink:type="simple">vgolub19@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6091-6534</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волокитина</surname><given-names>A.</given-names></name><name name-style="western" xml:lang="en"><surname>Volokitina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Anna A. Volokitina</p><p>36 Babushkina St., St. Petersburg, 192171</p></bio><email xlink:type="simple">anna.itmo@gmail.com</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>Запалова</surname><given-names>С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zapalova</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Svetlana S. Zapalova</p><p>36 Babushkina St., St. Petersburg, 192171</p></bio><email xlink:type="simple">zenii99@yandex.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>Жилин</surname><given-names>A.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhilin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Aleksandr A. Zhilin</p><p>3 Doroga na Metallostroi, pos. Metallostroi, St Petersburg, 196641</p></bio><email xlink:type="simple">zhilin1311@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Vavilov State Optical Institute</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-2"><institution>Vavilov State Optical Institute; Ioffe Institute</institution><country>Russian Federation</country></aff><aff xml:lang="en" id="aff-3"><institution>D.V. Efremov Institute of Electrophysical Apparatus</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>02</day><month>06</month><year>2025</year></pub-date><volume>14</volume><issue>6</issue><fpage>690</fpage><lpage>698</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bukina V.S., Dymshits O.S., Alekseeva I.P., Volokitina A.A., Zapalova S.S., Zhilin A.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Букина В., Дымшиц O., Алексеева И., Волокитина A., Запалова С., Жилин A.</copyright-holder><copyright-holder xml:lang="en">Bukina V.S., Dymshits O.S., Alekseeva I.P., Volokitina A.A., Zapalova S.S., Zhilin A.A.</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://nanojournal.ifmo.ru/jour/article/view/166">https://nanojournal.ifmo.ru/jour/article/view/166</self-uri><abstract><p>Transparent glass-ceramics of magnesium aluminosilicate system based on Fe2+:MgAl2O4 spinel nanocrystals nucleated by a mixture of TiO2 and ZrO2 and doped with 0.6 mol% FeO were developed. The glass was melted at 1580 C with stirring and heat-treated in the temperature range from 800 to 1300 C. The structure and spectroscopic properties of the glass and glass-ceramics were studied by DSC and XRD methods, Raman and absorption spectroscopy. ZrTiO4 nanocrystals 6 nm in size precipitate during the nucleation heat-treatment at 800 C. Spinel nanocrystals 9–14 nm in size are formed during heat-treatments at 850– 1000 C. Intense absorption at 2 m is observed due to Fe2+ ions in tetrahedral positions in these crystals. Iron-doped sapphirine crystallization in transparent glass-ceramics at 1000–1050 C results in a decrease of absorption in this spectral range. The glass-ceramics are important for the development of saturable absorbers for the spectral range of 2–3 m.</p></abstract><trans-abstract xml:lang="ru"><p>Созданы прозрачные магниевоалюмосиликатные стеклокристаллические материалы с нанокристаллами алюмомагниевой шпинели Fe2+:MgAl2O4 в качестве основной кристаллической фазы. Материалы содержат смесь TiO2 и ZrO2 в качестве нуклеатора объемной кристаллизации и 0.6 мол% FeO в качестве активатора. Исходное стекло было синтезировано при температуре 1580 ºC с перемешиванием и термообработано в интервале температур от 800 до 1300 ºC. Структура и спектральные свойства исходного стекла и полученных из него стеклокристаллических материалов были исследованы методами ДСК и РФА, спектроскопии комбинационного рассения света и абсорбционной спектроскопии. Нанокристаллы ZrTiO4 размером 6 нм выделяются на стадии предситаллизации при температуре 800 °C. Нанокристаллы шпинели размером 9-14 нм образуются при термообработке в интервале температур 850 - 1000 °C. Интенсивное поглощение света в области 2 мкм обусловлено ионам Fe2+, входящими в тетраэдрические позиции нанокристаллов шпинели. Кристаллизация железосодержащего сапфирина в прозрачных стеклокристаллических материалах при температуре термообработке 1000 и 1050 ºC приводит к уменьшению поглощения в этом спектральном диапазоне. Созданные материалы могут быть использованы для разработки насыщающихся поглотителей спектрального диапазона 2-3 мкм.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Нанокристаллы</kwd><kwd>шпинель</kwd><kwd>прозрачные стеклокристаллические материалы</kwd><kwd>ионы железа (II)</kwd><kwd>нуклеаторы объемной кристаллизации</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Nanocrystals</kwd><kwd>spinel</kwd><kwd>transparent glass-ceramics</kwd><kwd>ferrous ions</kwd><kwd>nucleating agents</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was partly supported by the Russian Science Foundation (Grant 23-23-00446).</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">Frolov M.P., Korostelin Yu.V., Kozlovsky V.I., Podmar’kov Yu.P., Savinova S.A., Skasyrsky Ya.K. 3 J. pulsed Fe:ZnS laser tunable from 3.44 to 4.19 m. Laser Phys. 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