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IR-transparent MgO-Gd_(2)O_(3) composite ceramics produced by self-propagating high-temperature synthesis and spark plasma sintering

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Journal of Advanced Ceramics 2021年第2期10卷 237-246页

作者： Dmitry A.Permin Maksim S.Boldin Alexander V.Belyaev Stanislav S.Balabanov Vitaly A.Koshkin Atrem A.Murashov Igor V.Ladenkov Evgeny A.Lantsev Ksenia E.Smetanina Nadia M.Khamaletdinova G.G.devyatykh institute of chemistry of high-purity substances of the ras nizhny novgorod603137russia Lobachevsky state university of nizhny novgorod nizhny novgorod603950russia “Joint-stock company”research and production enterprise“salut” nizhny novgorod603950russia G.A.Razuvaev institute of organometallic chemistry of the ras nizhny novgorod603137russia

A glycine–nitrate self-propagating high-temperature synthesis(SHS)was developed to produce composite MgO-Gd_(2)O_(3) *** X-ray powder diffraction(XRD)analysis confirmed the SHS-product consists of cubic MgO and Gd_(2)O_(3) phases with nanometer crystallite size and retains this structure after annealing at temperatures up to 1200℃.Near full dense high IR-transparent composite ceramics were fabricated by spark plasma sintering(SPS)at 1140℃and 60 *** in-line transmittance of 1 mm thick MgO-Gd_(2)O_(3) ceramics exceeded 70%in the range of 4–5 mm and reached a maximum of 77%at a wavelength of 5.3 *** measured microhardness HV0.5 of the MgO-Gd2O3 ceramics is 9.5±0.4 GPa,while the fracture toughness(KIC)amounted to 2.0±0.5МPa·m1/*** characteristics demonstrate that obtained composite MgO-Gd_(2)O_(3) ceramic is a promising material for protective infra-red(IR)windows.

关键词： MgO-Gd_(2)O_(3) self-propagating high-temperature synthesis(SHS) spark plasma sintering(SPS) optical properties infra-red(IR)ceramics

Viscosity of （TeO2）0.70-（WO3）0.22-（La203）0.08 Tellurite Glass Melt in 780-830 K Temperature Range

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材料科学与工程（中英文A版） 2012年第12期2卷 779-785页

作者： Lyubov Shabarova Sergey Smetanin Gennady Snopatin Mikhail Churbanov Vasiliy Shabarov G.G. devyatykh institute of chemistry of high-purity substances of the Russian Academy of Sciences Nizhny Novgorod 603950Russia

Impact of doping profiles on the formation of laser-active centers in bismuth-doped GeO_(2)–SiO_(2)glass fibers

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Photonics Research 2024年第2期12卷 260-270页

作者： SERGEY ALYSHEV ALEXANDER VAKHRUSHEV ALEKSANDR KHEGAI ELENA FIRSTOVA KONSTANTIN RIUMKIN MIKHAIL MELKUMOV LYUDMILA ISKHAKOVA ANDREY UMNIKOV SERGEI FIRSTOV Prokhorov General Physics institute of the Russian Academy of Sciences Dianov Fiber Optics Research Center119333 MoscowRussia devyatykh institute of chemistry of high-purity substances of the Russian Academy of Sciences 603951 Nizhny NovgorodRussia

Multi-wavelength-band transmission technology based on the exploitation of the extended spectral region is considered as a potential approach to increase the transmission capacity in the deployed fiber-optic communication *** development of optical amplifiers operating in the O-,E-,S-,and U-telecom bands is an extremely important challenge for the successful implementation of this ***-doped fibers are of increasing interest as gain materials,which can be used to provide broadband amplification in the mentioned telecom *** is due to the ability of Bi ions incorporated into glass network to form bismuth active centers(BACs)with specific optical properties,which are primarily determined by the glass *** this work,the impact of the doping profiles of both Ge atoms as glass modifiers and Bi ions on the BACs formation is studied using a series of bismuth-doped fibers fabricated by the modified chemical vapor deposition(MCVD)*** Bi-to-BACs conversion efficiency in various spatial regions of the studied samples is *** is turned out that for high-Bi concentration regions,the conversion efficiency is very low(less than 10%).In addition,the relationship of the conversion efficiency to the distribution of Bi ions and/or Ge atoms is ***,a continuous-wave laser at 1.46μm with a record slope efficiency of 80%is demonstrated using a Bi-doped fiber with confined doping profile,where the Bi-to-BACs conversion efficiency is 35%.This paper provides new information which might help to facilitate understanding of the features of Bi-doped fibers and their potentially achievable characteristics.

关键词： fiber fibers bismuth

A review on magneto-optical ceramics for Faraday isolators

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Journal of Advanced Ceramics 2023年第5期12卷 873-915页

作者： Lixuan Zhang Dianjun Hu Ilya LSnetkov Stanislav Balabanov Oleg Palashov Jiang Li Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China institute of Applied Physics of the Russian Academy of Sciences Nizhny Novgorod 603950Russia Lobachevsky State University of Nizhny Novgorod Nizhny Novgorod 603950Russia G.G.devyatykh institute of chemistry of high-purity substances Russian Academy of SciencesNizhny Novgorod 603951Russia

As a promising magneto-optical(MO)material applied in Faraday isolators,magneto-optical ceramics possess excellent comprehensive properties and have attracted much attention these ***,we review the fabrication and properties of magneto-optical ceramics including garnet,sesquioxide,and A_(2)B_(2)O_(7) *** of the ceramics have been proved to possess applicable performance,while further studies are still needed for most of the magneto-optical *** at the application for isolators,the research status,existing problems,and development trends of magneto-optical ceramics are shown and discussed in this review.

关键词： magneto-optical(MO)ceramics Faraday isolators optical quality thermo-optical effects

Enantioselective synthesis of functionalized fluorinated dihydropyrano[2,3-c]pyrazoles catalyzed by a simple bifunctional diaminocyclohexane-thiourea

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Chinese Chemical Letters 2014年第4期25卷 535-540页

作者： Hong-Fei Zhang Zheng-Qing Ye Gang Zhao Key Laboratory of Synthetic chemistry of Natural substances Shanghai Institute of Organic ChemistryChinese Academy of Sciences

Enantioselective synthesis of functionalized fluorinated dihydropyrano[2,3-c]pyrazoles has been achieved via a diaminocyclohexane-thiourea catalyzed cascade Michael addition and Thorpe-Ziegler type cyclization in high... 详细信息

关键词： Trifluoromethyl Pyrazoles Cyclization Organocatalysis

On the liquid-phase technology of carbon fiber/aluminum matrix composites

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International Journal of Minerals,Metallurgy and Materials 2019年第12期26卷 1578-1584页

作者： Sergei Galyshev Andrew Gomzin Rida Gallyamova Igor Khodos Fanil Musin institute of Solid State Physics of Russian Academy of Sciences Chernogolovka 142432Russia Ufa State Aviation Technical University Ufa 450000Russia Ufa chemistry institute of Russian Academy of Sciences Ufa 450000Russia institute of Microelectronics Technology and high purity Materials Russian Academy of Sciences Chernogolovka 142432Russia

The main problems with the liquid-phase technology of carbon fiber/aluminum matrix composites include poor wetting of the fiber with liquid aluminum and formation of aluminum carbide on the fibers’*** paper aims to solve these *** theoretical and experimental dependence of porosity on the applied pressure were *** possibility of obtaining a carbon fiber/aluminum matrix composite wire with a strength value of about 1500 MPa was *** correlation among the strength of the carbon fiber reinforced aluminum matrix composite,the fracture surface,and the degradation of the carbon fiber surface was discussed.

关键词： carbon fiber/aluminum matrix composite liquid-phase fabrication infiltration pressure composite porosity composite wire ultrasonic

Stereoselective Total Synthesis of Tubulysin V

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Chinese Journal of chemistry 2013年第1期31卷 40-48页

作者： Rui Wang Ping Tian Guoqiang Lin CAS Key Laboratory of Synthetic chemistry of Natural substances Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

The total synthesis of tubulysin V was accomplished in 1.0% overall yield with linear 13 steps. Our synthetic strategy featured the following two reactions. One is zinc-mediated aza-Barbier reaction of （R）-N-tert-butane- sulfinyl imine 8 with β-ester group functionalized allylic bromide 9 to afford the chiral homo-allylic amine （7）; the other is to employ the methodology of aqueous indium-mediated aza-Barbier reaction previously developed by our group, giving the chiral homo-allylic amine 13 with high efficiency.

关键词： tubulysin V N-tert-butanesulfinyl imines zinc indium aza-Barbier reaction

Description of Hemoproteins and Elemental Homeostasis in Brain Tumors

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Journal of Biosciences and Medicines 2018年第5期6卷 89-96页

作者： E. I. Erlykina L. M. Obukhova I. A. Medyanik K. S. Yashin V. G. Pimenov I. I. Evdokimov O. V. Barinova A. B. Yazykova Federal State Budgetary Educational Institution of higher Education “Privolzhsky Research Medical University” of the Min-istry of Health of the Russian Federation Nizhny Novgorod Russia FPFIS G.G. devyatykh institute of chemistry of high-purity substances of RAS Nizhny Novgorod Russia

The role of element homeostasis in neoplastic disease pathogenesis is be-yond question. The imbalance of trace elements precisely underlies the ini-tiation and promotion of tumor pathology. The aim of the study was to in-vestigate blood and tissue macroelements, microelements and hemoproteins level in brain tumors and their intermolecular interactions. Samples of blood and brain tumor tissues were investigated. Detection of myoglobin level was implemented by the reaction of passive hemagglutination and immunoturbidimetric test. Catalase activity was determined by the method of Beer and Sizer. Free radical activity was determined by the method of induced biochemiluminescence. Microelements level was investigated by usage of atomic emission spectrometry. To build the networks of studied hemoprotein interactions with signaling pathways of proteins, expressed in brain tumors, molecular interaction databases (STRING, BioGrid) were used. Modern databases of signaling pathways (KEGG) suggest that in normal cells hypoxia can lead to HIF-1A protein synthesis. ROS synthesis inhibits the PHD enzyme and triggers the release of calcium ions, and increases proliferation. Calcium ions are triggering factor of apoptosis and cell proliferation. Myoglobin can possibly be the cell adaptation factor towards hypoxia, oxidative stress and element homeostasis violation, and myoglobin level decreasing can additionally stimulate proliferation, by apoptosis inhibition.

关键词： Brain Tumors Elemental Homeostasis Hypoxia Intermolecular Interactions Signaling Pathways

CALS-Technology for Synthesis of Oxide Nanomaterials in Low-Temperature Plasm

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材料科学与工程（中英文A版） 2011年第3X期1卷 374-379页

作者： Bessarabov Arkadiy Kvasyuk Aleksey Kochetygov Aleksey Ivanov Mark The State Scientific-Research institute of Chemical Reagents and high purity Chemical substances (IREA) Moscow 107076 Russia LOHR PLASMA Hangenbieten 67980 France