<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Доклады Академии наук</journal-id><journal-title-group><journal-title xml:lang="en">Доклады Академии наук</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Академии наук</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-5652</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">15825</article-id><article-id pub-id-type="doi">10.31857/S0869-56524874387-390</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Chemical Technology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Химическая технология</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">New method for synthesis of fine crystalline magnesium aluminate spinel</article-title><trans-title-group xml:lang="ru"><trans-title>Новый метод синтеза мелкокристаллической алюмомагниевой шпинели</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Panasyuk</surname><given-names>G. P.</given-names></name><name xml:lang="ru"><surname>Панасюк</surname><given-names>Г. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kozerozhets</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Козерожец</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danchevskaya</surname><given-names>M. N.</given-names></name><name xml:lang="ru"><surname>Данчевская</surname><given-names>М. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivakin</surname><given-names>Yu. D.</given-names></name><name xml:lang="ru"><surname>Ивакин</surname><given-names>Ю. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Muravieva</surname><given-names>G. P.</given-names></name><name xml:lang="ru"><surname>Муравьева</surname><given-names>Г. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Izotov</surname><given-names>A. D.</given-names></name><name xml:lang="ru"><surname>Изотов</surname><given-names>А. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Corresponding Member of the Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>Член‑корреспондент РАН</p></bio><email>panasyuk@igis.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей и неорганической химии имени Н.С. Курнакова Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">"Московский государственный университет имени М.В. Ломоносова"</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-08-27" publication-format="electronic"><day>27</day><month>08</month><year>2019</year></pub-date><volume>487</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>387</fpage><lpage>390</lpage><history><date date-type="received" iso-8601-date="2019-08-23"><day>23</day><month>08</month><year>2019</year></date><date date-type="accepted" iso-8601-date="2019-08-23"><day>23</day><month>08</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Russian academy of sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Российская академия наук</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Russian academy of sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-5652/article/view/15825">https://journals.eco-vector.com/0869-5652/article/view/15825</self-uri><abstract xml:lang="en"><p>A new method for the synthesis of high-purity fine-crystalline aluminum-magnesium spinel MgAl<sub>2</sub>O<sub>4</sub> was been proposed. The procedure includes treatment of mixture finely dispersed MgO and hydroxide Al(OH)<sub>3</sub> or aluminum oxyhydroxide AlOOH by water fluid under supercritical conditions (<italic>T </italic>= 380-400 °С, P<sub>H2O</sub> = 22,8-23,0 MPa). It was been shown that the process of formation of the structure of aluminum-magnesium spinel proceeds through a solid-phase mechanism. By varying the conditions of synthesis, the new method of synthesis allows to adjust the size (from 20 nm to 5 µm) and shape (spherical, lamellar, bipyramidal) of particles of synthesized aluminum-magnesium spinel MgAl<sub>2</sub>O<sub>4</sub>.</p></abstract><trans-abstract xml:lang="ru"><p>Предложен новый метод синтеза высокочистой мелкокристаллической алюмомагниевой шпинели MgAl<sub>2</sub>O<sub>4</sub> путём обработки смеси тонкодисперсных MgO и гидроксида Al(OH)<sub>3</sub> или оксигидроксида алюминия AlOOH водным флюидом в сверхкритических условиях (<italic>Т </italic>= 380-400 °С, P<sub>H2O</sub> = 22,8-23,0 МПа). Показано, что процесс формирования структуры алюмомагниевой шпинели протекает по твердофазному механизму. Новый метод синтеза позволяет, варьируя условия синтеза, регулировать размер от 20 нм до 5 мкм и форму (сферическая, пластинчатая, бипирамидальная) частиц синтезированной алюмомагниевой шпинели MgAl<sub>2</sub>O<sub>4</sub>.</p></trans-abstract><kwd-group xml:lang="en"><kwd>aluminum-magnesium spinel</kwd><kwd>synthesis in supercritical fluid</kwd><kwd>solid-phase mechanism</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гидротермальный синтез</kwd><kwd>алюмомагниевая шпинель</kwd><kwd>твердофазный механизм</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Институт общей и неорганической химии имени Н.С. Курнакова Российской академии наук</institution></institution-wrap></funding-source><award-id></award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Lomonosov Moscow State University</institution></institution-wrap><institution-wrap><institution xml:lang="ru">"Московский государственный университет имени М.В. Ломоносова"</institution></institution-wrap></funding-source><award-id></award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ganesh J. A. Review on Magnesium Aluminate (MgAl2O4) Spinel: Synthesis, Processing and Applications // Int. Materials Revs. 2013. V. 115. № 16. P. 63-112.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Каракчиев Л. Г., Аввакумов Е. Г., Винокурова О. Б., Гусев А. А. Шпинелеобразование при термической обработке механически активированных смесей брусита и гидраргиллита // ЖНХ. 2005. Т. 50. № 10. С. 1612-1616.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Cansell F., Aymonier C. Design of Functional Nanostructured Materials Using Supercritical Fluids // J. Supercritical Fluids. 2009. V. 47. № 3. P. 508-516.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Levy C., Watanabe M., Aizawa Y., Inomata H. Synthesis of Nanophased Metal Oxides in Supercritical Water // J. Appl. Ceram. Technol. 2006. V. 3. № 5. P. 337-344.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Залепугин Д. Ю., Тилькунова Н. А., Чернышова И. В., Поляков В. С. Развитие технологий, основанных на использовании сверхкритических флюидов // Сверхкритические флюиды: теория и практика. 2006. Т. 1. № 1. С. 27-51.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Danchevskaya M. N., Ivakin Yu.D., Torbin S.N., Ovchinnikova O. G., Muravieva G.P. The Solid-Phase Synthesis in Water Fluid // Isha Newsletter. 2008. V. 3. № 1. P. 12-21.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Danchevskaya M. N., Ivakin Yu.D., Muravieva G. P., Luchkov I. V. Synthesis and Doping of Fine-Crystalline Corundum in Sub- and Supercritical Conditions // J. Phys. Conf. Ser. 2008. V. 121. № 082001. P. 1-5.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Danchevskaya M. N., Martynova L. F., Torbin S. N., Muravieva G. P. Role of Intermediate Solid Phase in the Process of Magnesium and Lanthanum Aluminates Formation in the Sub- and Supercritical Water // High Pressure Res. 2001. V. 20. P. 109-119.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Panasyuk G. P., Azarova L. A., Belan V. N., Pershikov E. A., Semenov S. A., Danchevskaya M. N., Voroshilov I. L., Kozerozhets I. V. Preparation of Fine-Grained Corundum Powders with Given Properties: Crystal Size and Habit Control // Theor. Foundations Chem. Eng. 2018. V. 52. № 5. P. 903-910.</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Danchevskaya M. N., Ivakin Yu.D., Torbin S. N., Muravieva G. P. Technological Capability of Synthesis of Inorganic Oxides in Water Fluid in Neighborhood of Critical Point // J. Supercritical Fluids. 2008. V. 46. P. 358-364.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Danchevskaya M. N., Ivakin Yu.D., Muravieva G. P., Torbin S. N. Synthetic Magnesium Spinel - Raw Material for Optical Ceramics. 14th European Meeting on Supercritical Fluids. Marseille (France). 18 May - 21 May. 2014.</mixed-citation></ref></ref-list></back></article>
