Библиотека института физики им. Л.В. Киренского СО РАН

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Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Bogdanov A. A., Balezin M., Kapitanova P. V., Sadrieva Z., Belyakov M. A., Nenasheva E. A., Sadreev A. F.
Заглавие : Experimental observation of symmetry protected bound state in the radiation continuum in the periodic array of ceramic disks
Коллективы : International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures
Место публикации : J. Phys. Conf. Ser.: IOP, 2018. - Vol. 1124: 5th International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures, Saint Petersburg OPEN 2018 (2 April 2018 through 5 April 2018, ) Conference code: 144220, Is. 5. - Ст.051057. - , DOI 10.1088/1742-6596/1124/5/051057
Примечания : Cited References: 3. - This work was supported by the Russian Foundation for Basic Research (16-37-60064, 17-02-01234), the Ministry of Education and Science of the Russian Federation (3.1668.2017/4.6), the President of Russian Federation (MK-403.2018.2).
Ключевые слова (''Своб.индексиров.''): ceramic disks--field profile--ghz frequencies--material loss--periodic arrays--quadratic growth--resonant state--transmission spectrums
Аннотация: We observe experimentally symmetry protected bound states in the continuum (BICs) in the stack of ceramic disks. We analyze transformation of the resonant state into BIC with increasing of the number of disks theoretically and experimentally. In the experiment we measure the transmission spectra through the array of ceramic disks at GHz frequencies. We observe a quadratic growth of the Q-factor of quasi-BIC with the number of disks due to material losses. We cross-check the observation of BIC in the transmission spectra by measurement of the field profiles which are a good agreement with the results of the numerical simulations. © Published under licence by IOP Publishing Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Morozov E. V., Buznik V. M., Bespalov A. S., Grashchenkov D. V.
Заглавие : Magnetic Resonance Imaging of Water Absorption by Highly Porous Ceramic Materials
Место публикации : Dokl. Chem. - 2019. - Vol. 484, Is. 2. - P.44-47. - ISSN 00125008 (ISSN), DOI 10.1134/S0012500819020058
Примечания : Cited References: 9. - The studies were performed using equipment of KRTsKP FITs "KNTs SO RAN" in the framework of the program of basic research of the Russian Academy of Sciences (project no. V.44.1.7.) regarding the development of the MRI methodology for studying composite and porous materials, and also supported by the Russian Foundation for Basic Research (project no. 16-29-05334ofi_m "Scientific foundations for creating thin-film coatings with controlled wettability") regarding the development of water-repellent porous materials.
Ключевые слова (''Своб.индексиров.''): magnetic resonance imaging--porosity--ceramic materials--hydrophobic coatings--adsorption--capillary phenomena
Аннотация: A nontrivial character of water absorption in highly porous ceramic materials has been demonstrated for the first time by magnetic resonance imaging: a phenomenon of hygroscopic memory has been detected consisting in the concentration of adsorbed water in certain areas inside the sample, repeated during subsequent wetting with water. It has been shown that hydrophobization of the material by applying fluoro paraffin coatings to oxide fibers using the method of dissolution of fluoropolymers in supercritical CO2 has a significant impact on the transport of water into products and can be considered an efficient means of protecting porous materials from moisture. The results demonstrate the capabilities of the MRI method in studying the water absorption and identifying water migration pathways in highly porous materials.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Minakov A. V., Mikhienkova E. I., Voronenkova Y. O., Neverov A. L., Zeer G. M., Zharkov S. M.
Заглавие : Systematic experimental investigation of filtration losses of drilling fluids containing silicon oxide nanoparticles
Место публикации : J. Nat. Gas Sci. Eng. - 2019. - Vol. 71. - Ст.102984. - ISSN 18755100 (ISSN), DOI 10.1016/j.jngse.2019.102984
Примечания : Cited References: 28. - The research was performed with the financial support of the Russian Science Foundation under project No. 17-79-20218.
Аннотация: This paper presents the results of silicon oxide nanoparticles-incorporated drilling fluid filtration through a porous medium with different permeability. A water-based clay suspension was used as a basic model for creating investigated fluid samples. AlN (aluminium nitride) particles were used as a dispersed phase. The concentration of microparticles varied from 0.5 to 4.00 wt%, while the microparticles size varied from 1 to 10 ?m. The concentration of SiO2 nanoparticles was changed within the range of 0.25 and 4.00 wt%, while the nanoparticles size varied from 5 to 100 nm. It was shown that filtration of drilling fluids with nanoparticles inclusions depends on their concentration, size and material, the concentration and size of microparticles and the pore sizes of ceramic filters. The addition of the nanoparticles leads to a significant reduction in filtration of a microsuspension and affects the structure and thickness of a cake formed on the surface of a filter. The main novelty of this work lies in the fact that the effect of the addition of nanoparticles on filtration losses depends on the ratio between nano and microparticles. It was shown that the positive effect of nanoparticle additives on filtration losses is determined not only by the properties of nanoparticles (size and concentration), but also by the properties of microparticles contained in the drilling fluid, as well as the characteristics of the rock (pore size). © 2019 Elsevier B.V.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yang, Xiang, Zhang, Y.u., Zhang, Xuejie, Chen, Jian, Huang, Haisen, Wang, Dongsheng, Chai, Xirong, Xie, Gening, Molokeev M. S., Zhang, Haoran, Liu, Yingliang, Lei, Bingfu
Заглавие : Facile synthesis of the desired red phosphor Li2Ca2Mg2Si2N6:Eu2+ for high CRI white LEDs and plant growth LED device
Место публикации : J. Am. Ceram. Soc. - 2020. - Vol. 103, Is. 3. - P.1773-1781. - ISSN 0002-7820, DOI 10.1111/jace.16858. - ISSN 1551-2916(eISSN)
Примечания : Cited References: 34. - National Natural Science Foundations of China, Grant/Award Number: 21671070 and 51802101; Project GDUPS; Natural Science Foundation of Guangdong Province, Grant/Award Number: 2018A030310217; Guangzhou Science & Technology Project, Grant/Award Number: 201704030086; Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams; National Undergraduate Innovation and Entrepreneurship Training Program granted for Gening Xie, Grant/Award Number: 201910564035
Предметные рубрики: IN-GLASS
LUMINESCENCE
PERFORMANCE
EFFICIENT
EMISSION
ROUTE
Аннотация: The red emission with suitable peak wavelength and narrow band is acutely required for high color rendering index (CRI) white LEDs without at the cost of the luminous efficacy. Herein, the Li2Ca2Mg2Si2N6:Eu2+ red phosphor was prepared with facile solid‐state method using Ca3N2, Mg3N2, Si3N4, Li3N, and Eu2O3 as the safety raw materials under atmospheric pressure for the first time, which shows red emission peaking at 638 nm with full width at half maximum (FWHM) of 62 nm under blue light irradiation and becomes the desired red phosphor to realize the balance between luminous efficacy and high CRI in white LEDs. The morphology, structure, luminescence properties, thermal quenching behavior, and chromaticity stability of the Li2Ca2Mg2Si2N6:Eu2+ phosphor are investigated in detail. Concentration quenching occurs when the Eu2+ content exceeds 1.0 mol%, whereas high‐temperature photoluminescent measurements show a 32% drop from the room‐temperature efficiency at 423 K. In view of the excellent luminescence performances of Li2Ca2Mg2Si2N6:Eu2+ phosphor, a white LEDs with CRI of 91 as a proof‐of‐concept experiment was fabricated by coating the title phosphor with Y3Al5O12:Ce3+ on a blue LED chip. In addition, the potential application of the title phosphor in plant growth LED device was also demonstrated. All the results indicate that Li2Ca2Mg2Si2N6:Eu2+ is a promising red‐emitting phosphor for blue LED‐based high CRI white LEDs and plant growth lighting sources.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sal'nikova E. I., Denisenko Y., Aleksandrovsky A. S., Kolesnikov I. E., Lahderanta E., Andreev P. O., Azarapin N. O., Andreev O. V., Basova S. A., Matigorov A. V.
Заглавие : Synthesis and optical properties RE2O2S:Ln (RE = La, Y; Ln = Ce, Eu, Dy, Er)
Место публикации : J. Solid State Chem. - 2019. - Vol. 279. - Ст.120964. - ISSN 00224596 (ISSN), DOI 10.1016/j.jssc.2019.120964
Примечания : Cited References: 53
Аннотация: The phase formation sequence was studied in the preparation of solid solutions of RE2O2S: Ln’ (RE = La, Y; Ln’ = Ce, Eu, Dy, Er) by the reduction of the match co-precipitated sulfates, followed by sulfidization of the reduction products. For uniform distribution of cations in the matrix, a method of chemical homogenization was used, consisting in the preparation of an aqueous solution containing all the necessary cations and their subsequent precipitation in the form of sulfates. The use of sulfates as precursors facilitates the process of obtaining solid solutions of oxysulfides, since sulfates already contain SO4 2--ions. The phase and morphological certification of the obtained solid solutions was carried out. The study of steady state luminescent properties demonstrated characteristic bands which are assigned to 4f-4f and 5d-4f transition. The obtained results showed the possibility of applying the method to synthesize optical ceramics based on solid solutionsRE2O2S: Ln (RE = La, Y; Ln = Ce, Eu, Dy, Er).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Bondarev V. S., Raevskaya S. I., Flerov I. N., Malitskaya M. A., Raevskii I. P.
Заглавие : Thermophysical study of structural phase transitions in Na0.95Li0.05NbO3 solid solution
Место публикации : Bull. Russ. Acad. Sci. Phys.: Allerton Press, 2016. - Vol. 80, Is. 9. - P.1046-1050. - ISSN 10628738 (ISSN), DOI 10.3103/S1062873816090148
Примечания : Cited References: 18. - This work was supported by Southern Federal University, project no. 213.01-2014/012-VG.
Ключевые слова (''Своб.индексиров.''): niobium oxide--sodium--specific heat--temperature distribution--thermal expansion--ceramic samples--effect of heat treatments--possible mechanisms--sodium lithium niobate--structural distortions--structural phase transition--temperature dependence--temperature range--lithium
Аннотация: Temperature dependences of specific heat Cp(T) and coefficient of thermal expansion α(T) for Na0.95Li0.05NbO3 sodium-lithium niobate ceramic samples are investigated in the temperature range of 100–800 K. The Cp(T) and α(T) anomalies at T3 = 310 ± 3 K, T2 = 630 ± 8 K, and T1 = 710 ± 10 K are observed, which correspond to the sequence of phase transitions N ↔ Q ↔ S(R) ↔ T2(S). The effect of heat treatment of the samples on the sequence of structural distortions was established. It is demonstrated that annealing of the samples at 603 K leads to splitting of the anomaly corresponding to the phase transition Q → R/S in two anomalies. After sample heating to 800 K, the only anomaly is observed in both the Cp(T) and α(T) dependence. Possible mechanisms of the observed phenomena are discussed.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Dedova E. S., Pertushina M. U., Kondratenko A. I., Gorev M. V., Kulkov S. N.
Заглавие : Complex oxide with negative thermal expansion for producing ceramic matrix composites with invar effect
Коллективы : International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
Место публикации : AIP Conf. Proc. - 2016. - Vol. 1783: Advanced materials with hierarchical structure for new technologies and reliable structures 2016. - Ст.020037. - , DOI 10.1063/1.4966330
Примечания : Cited References: 12. - The research was conducted with partial financial support by an agreement with the Ministry of Education No. 14.575.21.0040 (RFMEFI57514X0040). Authors are grateful to Institute of Physics for their help in the dilatometer investigation.
Ключевые слова (''Своб.индексиров.''): ceramics--zirconium tungstate--negative thermal expansion coefficient--phase transformation--spinel
Аннотация: The article investigates the phase composition of (Al2O3 – 20 wt % ZrO2)–ZrW2O8 ceramic composites obtained by cold-pressing and sintering processes. Using X-ray analysis it has been shown that composites mainly have monoclinic modification of zirconium dioxide and orthorhombic phase of aluminum oxide. After adding zirconium tungstate the phase composition of sintered ceramics changes, followed by the formation of tungsten-aluminates spinel such as Alx(WOy)z. It has been shown that thermal expansion coefficient of material decreases approximatly by 30%, as compared with initial ceramics.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zeer G. M., Zelenkova E. G., Nikolaeva N. S., Zharkov S. M., Abkaryan A. K., Mikheev A. A.
Заглавие : Microstructure and phase composition of the two-phase ceramic synthesized from titanium oxide and zinc oxide
Место публикации : Sci. Sinter. - 2018. - Vol. 50, Is. 2. - P.173-181. - ISSN 0350820X (ISSN), DOI 10.2298/SOS1802173Z
Примечания : Cited References: 22
Ключевые слова (''Своб.индексиров.''): nanopowders--titanium oxide--zinc oxide--solid phase reaction--ceramic
Аннотация: We have made investigations of the phase formation and microstructure on the ceramics obtained from a starting nanopowder mixture with the weight ratio ZnO : TiO2 = 4 : 1. Ceramic is obtained at different sintering temperatures, namely, 948, 1223 and 1473 К. Using the characterization methods of electron microscopy, energy dispersive microanalysis and X-ray diffraction phase analysis it has been shown that the ceramics structure is consisted of two dispersed phases of Zn2TiO4 and ZnO with the grain sizes being in range 0,5-1 μm. It has been found also that, at ceramic`s sintering temperature of 1223 К, the solid phase interactions are completed with the structure ZnO : Zn2TiO4 ≈ 1 : 1,5 phase ratio.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Balyzin M., Sadrieva Z., Belyakov M. A., Kapitanova P., Sadreev A. F., Bogdanov A.
Заглавие : Bound state in the continuum in 1D chain of dielectric disks: Theory and experiment
Коллективы : International Conference on Metamaterials and Nanophotonics
Место публикации : J. Phys. Conf. Ser. - 2018. - Vol. 1092: 3rd International Conference on Metamaterials and Nanophotonics, METANANO 2018 (17 - 21 September 2018). - Ст.012012. - , DOI 10.1088/1742-6596/1092/1/012012
Примечания : Cited References: 11. - This work is supported by RSF (17-12-01581)
Ключевые слова (''Своб.индексиров.''): 1-d chains--bound state--ceramic disks--dielectric disks--ghz frequencies--material loss--quadratic growth--zero angular momentum
Аннотация: In this work we experimentally observe a symmetry protected optical bound state in the continuum (BIC) with zero angular momentum in 1D array of ceramic disks at GHz frequencies. We analyze the dependence of Q factor of BIC on the number of the disks and the level of the material losses. We confirmed theoretical prediction about quadratic growth of the Q factor with the number of the disks and its following saturation due to material losses.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wei Y., Qu X., Li G., Cheng Z., Molokeev M. S., Lin C. C., Chan T. -S., Chang C. -K., Chuang Y. -C., Lin J.
Заглавие : Ultra-narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry
Место публикации : J. Am. Ceram. Soc. - 2019. - Vol. 102. - P.2353– 2369. - ISSN 00027820 (ISSN) , DOI 10.1111/jace.16127
Примечания : Cited References: 63. - This work was supported by the National Natural Science Foundation of China (Grant Nos. 51672259, 51672265, 21521092, 51750110511), Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences (Wuhan) (No. NGM2016KF002), the Ministry of Science and Technology of Taiwan (Contract No. MOST 104-2113-M-027-007-MY3), the Key Research Program of Frontier Sciences, CAS (Grant No. YZDY-SSW-JSC018), and projects for science and technology development plan of Jilin province (20170414003GH), the Program for Jiangmen Innovative Reasearch Team (No.[2017]385),major program of basic research and applied research of Guangdong Province (2017KZDXM083) and the Russian Science Foundation (Grant No. 17-12-01047).
Ключевые слова (''Своб.индексиров.''): blue emission--high symmetry--phosphors--ultra-narrow band--wleds
Аннотация: Phosphor materials with ultra‐high color purity are highly desired in backlit display and WLEDs. How to achieve high‐purity three‐primary emission in rare earth ions activated inorganic phosphors has become a hot topic. Herein, we reported ultra‐narrow band and highly efficient blue‐violet‐emitting Eu2+‐doped Ba2B5O9X (fwhm = 31 nm) and NaBa4(AlB4O9)2X3 (X = Cl, Br) (fwhm = 43 nm) phosphors with peak positions around 424‐437 nm. Especially, the color purity of Ba2B5O9Cl:Eu sample even exceeded 97%, its internal quantum efficiency could achieve 87%. The EXANES analysis revealed that the Eu mainly existed in the form of +2. According to the Rietveld structural refinement, extraordinarily narrow band emission should be attributed to the highly symmetric lattice structures with the flower‐like polyhedrons in the studied (alumino)borate matrix. Significantly, the color gamut of as‐prepared blue phosphor combined with the standard green and red phosphors was almost close to that of Rec. 2020 display standard. In addition, cation substitution strategy in NaBa4(AlxB5‐xO9)2Cl3 (x = 0‐4) and NaBa4(GayB5‐yO9)2Cl3 (y = 0‐3) samples successfully achieved spectra adjustment, and the underlying mechanism was proposed. All these results demonstrate that the as‐prepared phosphors could be superior blue‐emitting candidates for backlit display as well as WLEDs.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pavlov A. V., Kveglis L. I., Saprykin D. N., Nasibullin R. T., Kalitova A. A., Velikanov D. A., Nemtsev I. V., Kantai N.
Заглавие : Emergence of ferromagnetism in nanoparticles of BeTiO3 ceramic with the perovskite structure
Место публикации : Inorg. Mater.: Appl. Res. - 2021. - Vol. 12, Is. 1. - P.88-93. - ISSN 20751133 (ISSN), DOI 10.1134/S2075113321010330
Примечания : Cited References: 21. - The part of the work involving calculations was supported by the Russian Science Foundation (grant no. 18-19-00268)
Аннотация: Emergence of ferromagnetism and an increase in the electrical conductance of BeTiO3 beryllium ceramic with the perovskite structure were discovered experimentally. To explain the reason for appearance of the metallic properties, models are proposed, and calculations of the electronic structure of nanoclusters with different short-range order are performed.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Coondoo I., Panwar N., Krylova S. N., Krylov A. S., Alikin D., Jakka S. K., Turygin A., Shur V. Y., Kholkin A. L.
Заглавие : Temperature-dependent Raman spectroscopy, domain morphology and photoluminescence studies in lead-free BCZT ceramic
Место публикации : Ceram. Int. - 2021. - Vol. 47, Is. 2. - P.2828-2838. - ISSN 02728842 (ISSN), DOI 10.1016/j.ceramint.2020.09.137
Примечания : Cited References: 65. - I.C. would like to thank financial assistance by national funds (OE), through FCT – Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology / MCTES . The authors would also like to acknowledge the Ural Center for Shared Use “Modern nanotechnology”, Ural Federal University, Russia and the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”. The authors would like to thank Dr. E. Venkata Ramana, Department of Physics, University of Aveiro for the dielectric measurements. The work was supported by Government of the Russian Federation (Act 211, 440 Agreement 02.A03.21.0006)
Аннотация: Present work focuses on detailed temperature-dependent X-ray diffraction, Raman scattering, domain configuration, and photoluminescence (PL) studies in the (Ba0·85Ca0.15) (Zr0·10Ti0.90)O3 (BCZT) ceramics. The comprehensive Raman spectroscopy analysis in the present work not only validates the presence of the intermediate orthorhombic phase in BCZT, but also provides evidence of another transition: rhombohedral R3c phase to R3m at low temperature. Temperature behaviour of the lowest frequency transverse optical mode (soft E (TO) phonon) and hard modes was studied. Temperature dependence of peak positions, intensities, and linewidths of Raman phonon modes signalled the presence of phase transitions near −50 ± 5 °C, 0±5 °C, 35±5 °C and 110 ± 10 °C. Evolution of domain morphology occurring at phase transitions above room temperature was studied by piezoresponse force microscopy technique. Analysis of PL spectra revealed disorder/heterogeneity in the sample and indicated the existence of self-trapped excitons. PL spectra are composed of four distinct colour components (~2.55eV:blue, ~2.32eV:green, ~2.08eV:orange and ~1.78eV:red).
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fadeeva N. P., Pavlov M. V., Kharchenko I. A., Simunin M. M., Shabanova K. A., Pavlov V. F., Ryzhkov I. I.
Заглавие : High strength ceramic substrates based on perlite and foam silicates for filtration membranes
Место публикации : Membr. Membr. Technol. - 2022. - Vol. 4, Is. 3. - P.170-176. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751622030040
Примечания : Cited References: 32. - The work was performed using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences. This work was partially supported by the Russian Foundation for Basic Research, grant no. 18-29-19078
Аннотация: Samples of two-layer ceramics based on polydisperse powder of the pearlite mineral and foam silicates possessing high compressive strength up to 50 MPa, thermal stability up to 1150°C, and water permeability of 272 m3/h m2 bar have been obtained. According to the X-ray powder diffraction analysis, the supporting substrate material is X-ray amorphous. The average pore size of the supporting substrate is 40 µm, while the average pore size of the modifying layer is 17 µm according to the bubble method and electron microscopy. The obtained materials are promising for use as substrates of microfiltration, ultrafiltration, and nanofiltration membranes.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fomenko E. V., Akimochkina G. V., Anshits A. G., Fadeeva N. P., Kharchenko I. A., Elsuf’ev E. V., Shabanova K. A., Maksimova A. A., Ryzhkov I. I.
Заглавие : Ceramic substrates for filtration membranes based on fine fly ash microspheres
Колич.характеристики :13 с
Место публикации : Membr. Membr. Technol. - 2024. - Vol. 6, Is. 2. - P.71-83. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751624020033. - ISSN 25177524 (eISSN)
Примечания : Cited References: 58. - The work was carried out with the support of the Russian Science Foundation, project no. 23-19-00269, using the equipment of the Krasnoyarsk Regional Center for Collective Use at the Krasnoyarsk Federal Research Center of the Siberian Branch of the Russian Academy of Sciences
Аннотация: A procedure has been proposed for producing ceramic substrates for filtration membranes based on a narrow fraction of fine fly ash microspheres using cold uniaxial pressing followed by high-temperature firing. It has been shown that increasing the sintering temperature from 1000 to 1150°C leads to a decrease in open porosity from 40 to 24%, a decrease in the average pore size from 1.60 to 0.34 μm, and an increase in the compressive strength from 9.5 to 159 MPa. The resulting substrates are characterized by water permeability values of 1210, 310, 240, 170 L m−2 h−1 bar−1 at sintering temperatures of 1000, 1050, 1100 and 1150°C, respectively. Experiments on filtration of aqueous suspensions of fine microspheres (dav = 2.5 µm) and microsilica (dav = 1.9 μm) through a substrate produced at a sintering temperature of 1150°C have shown the rejection close to 100%. The proposed methodology for using ash waste in the production of membrane materials promotes the development of technologies for the integrated processing of thermal energy waste.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Wu, Yanzheng, Li, Weiqiang, Zheng, Yifan, Xu, Yiqin, Wen, Dawei, Molokeev M. S., Pan, Zaifa
Заглавие : Apatite oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+: A single-phased host with solar-like and efficient emission
Место публикации : J. Am. Ceram. Soc. - 2023. - Vol. 106, Is. 5. - P.2985-2996. - ISSN 00027820 (ISSN), DOI 10.1111/jace.18981. - ISSN 15512916 (eISSN)
Примечания : Cited References: 35. - This work was supported by the National Natural Science Foundation of China (Project No. 10804099, 21804119), Key projects of Zhejiang Natural Science Foundation (Project No. LZ18B050002), GDAS’ Project of Science and Technology Development (Nos. 2021GDASYL-20210103069, 2021GDASYL-20210103071)
Аннотация: During pursuing high color rendering index for full-color-emitting phosphor, low quantum efficiency (QE) is usually accompanying. We intend to elevate the luminescence efficiency when realizing a solar-like spectra distribution, by constructing apatite structure oxynitride, inheriting high covalence and rigidity from oxynitride, and suitable multiple cation sites from oxyapatite compounds. Full-color-emitting apatite structure oxynitride phosphor (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ has been prepared, and the crystal sites’ occupancies of activators in this host were favorable for white emission. (Mg,Y)5Si3(O,N)13:Ce3+,Mn2+ phosphor shows whole visible light with emission wavelength ranging from 370 to 750 nm, matching the spectra of sunlight quite well. The fabricated white light-emitting diode lamp demonstrated the distinctive overall performance of QE and chromaticity properties (Ra and R9). Furthermore, correlated color temperature is tunable from cool nature to warm white. The obtained lamp possesses the feature of less blue light hazard and high saturation of red degree, compared with the commercial YAG-based lamp.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Orlov Yu. S., Dudnikov V. A., Vereshchagin S. N., Volochaev M. N., Gavrilkin S. Y., Tsvetkov A. Y.
Заглавие : Order–disorder transition in the Dy0.2Sr0.8CoO3-δ rare-earth cobalt oxide solid solutions: Structural and thermoelectric properties
Место публикации : J. Eur. Ceram. Soc. - 2020. - Vol. 40, Is. 15. - P.5559-5565. - ISSN 09552219 (ISSN), DOI 10.1016/j.jeurceramsoc.2020.06.066
Примечания : Cited References: 29. - This study was supported by the Russian Science Foundation, project no. 19-72-00097
Аннотация: By the example of the Dy0.2Sr0.8CoO3-δ compound undergoing an order–disorder phase transition with increasing temperature, we demonstrate a significant dependence of the kinetic properties on the morphology of the internal spatially inhomogeneous structure, which forms in the sample depending on the rate of its transition from the high-temperature disordered cubic phase to the ground tetragonal ordered phase upon cooling. The results of transmission electron microscopy visualization of the spatially inhomogeneous state in the Dy0.2Sr0.8CoO3-δ ceramic samples are presented and compared with the X-ray diffraction data.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Lepeshev A. A., Pavlov A. V., Drokin N. A., Malkin A. I., Kiiko V. S., Knyazev N. S.
Заглавие : Features of the Preparation and Study of Electrophysical Characteristics (BeO+TiO2)-Ceramics by Impedance Spectroscopy
Место публикации : Refract. Ind. Ceram. - 2019. - Vol. 60, Is. 3. - P.309-317. - ISSN 1083-4877, DOI 10.1007/s11148-019-00359-1. - ISSN 1573-9139 (eISSN)
Примечания : Cited References: 26
Аннотация: An electrically conducting two-component BeO-ceramic with the addition of micro- and nano-crystalline TiO2 powder is prepared that can be used as a material for scattered microwave radiation absorption in high-power electronic devices. The nature of the occurrence of electrical conductivity and absorption of the microwave field in (BeO + TiO2)-ceramics is not completely established. Impedance spectroscopy is used for the first time to investigate the electrical and dielectric characteristics of this ceramic in the frequency range from 100 Hz to 100 MHz in relation to presence of micro- and nano-sized TiO2 phase within the BeO ceramic composition. It is established that the static resistance of ceramics with addition of a TiO2 nanopowder is significantly reduced compared with the resistance of original ceramic with TiO2 micropowder. It is shown that real and imaginary components of the dielectric constant of the ceramic studied increase to abnormally large values with a reduction in frequency of the effective electric field, and in the high frequency range f ≥ 108 Hz the process of dielectric relaxation commences leading to an increase in dielectric loss angle. Dielectric properties of ceramic samples are determined under blocking conditions for through conduction. The effect of TiO2 micropowder additions on dielectric polarization processes with frequency increasing up to 12 × 109 Hz is considered.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Yasinskiy A. S., Padamata S. K., Polyakov P. V., Shabanov A. V.
Заглавие : An update on inert anodes for aluminium electrolysis
Место публикации : Non-Ferrous Met. - 2020. - Vol. 48, Is. 1. - P.15-23. - ISSN 20720807 (ISSN), DOI 10.17580/nfm.2020.01.03
Примечания : Cited References: 62. - The work is performed as a part of the state assignment for the science of Siberian Federal University, project number FSRZ-2020-0013. Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged
Аннотация: This update includes the literature related to the inert anodes which were published in the past decade. The metallic anodes are widely regarded as promising candidates to replace the carbon anodes due to its attractive properties like good electrical conductivity, easy to manufacture and high resistance to high thermal shocks. The metals have been tested in pure state and alloy (binary, ternary) form. The oxide scale formed on the anode surface acts as a barrier between the electrolyte and the anode, which protects the anode from being dissolved. The layer of molten fluorides is formed between the scale and the metal anode after a certain time of polarization, and the oxide scale acts as a bipolar electrode. Metal like Cu is reduced at the internal side of the scale. This paper elaborates the effects of various parameters on the performance of the anode. Cu-based alloys (Cu – Ni – Fe and Cu – Al) have shown promising results and could perform well in low-temperature electrolytes. It has been well established that the Cu content in Cu – Ni – Fe and Cu – Al alloys plays a major role in the metal dissolution as the CuO/Cu2O scales formed on the outer layer act as a sacrificial one. The corrosion rate of an anode can be reduced by decreasing the operating temperature, which is possible by using the KF – AlF3 melts. The use of suspensions can increase the purity of the produced metal by stop-ping the anode products to come in contact with cathode metal. Many industries including RUSAL and ELYSIS are still conducting a considerable amount of research to develop an inert anode and are expecting to have a carbon-free cell in the nearest future.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Drokin N. A., Kiiko V. S., Pavlov A. V., Malkin A. I.
Заглавие : BT-30 Ceramic Electrophysical Properties
Место публикации : Refract. Ind. Ceram. - 2020. - Vol. 61, Is. 3. - P.341-348. - ISSN 1083-4877 (ISSN), DOI 10.1007/s11148-020-00484-2. - ISSN 1573-9139 (eISSN)
Примечания : Cited References: 12
Аннотация: A total complex resistance (impedance) method is used to study the electrophysical characteristics of (BeO + TiO2)-ceramics modified with TiO2 micro- and nanoparticles in an amount of 30 wt.% (BT-30). Dispersion of the actual ε′ and imaginary ε′′ components of the dielectric permittivity component and specific conductivity in the frequency range from 100 Hz to 100 MHz from room temperature to the boiling point of liquid nitrogen are determined. High values of ε′ and ε′′ in the low-frequency range are typical for structurally inhomogeneous materials due to the accumulation of electric charges at the surface and within microcrystals. Two dielectric relaxation processes associated with electrical conductivity within the body and at the surface of ceramics are detected for the first time. An increase in conductivity with an increase in the microwave field frequency above 1 MHz is explained by the appearance of a current relaxation component. The activation energy of the static resistance of ceramic specimens is determined as a function of the reciprocal temperature that depends little on the weight content of TiO2 nanoparticles and varies in the range of 0.024 – 0.10 eV This also confirms the existence of two independent conduction processes, weakly dependent on the nanoparticle content in the ceramic composition. With placement of ceramic in a high-frequency electric field, spatial charges are formed, the field of which contributes to creation of additional polarization and dielectric losses.
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20.

Вид документа : Статья из журнала
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Автор(ы) : Mikhaleva E. A., Gorev M. V., Bondarev V. S., Bogdanov E. V., Flerov I. N.
Заглавие : Comparative analysis of elastocaloric and barocaloric effects in single-crystal and ceramic ferroelectric (NH4)2SO4
Место публикации : Scripta Mater. - 2021. - Vol. 191. - P.149-154. - ISSN 13596462 (ISSN), DOI 10.1016/j.scriptamat.2020.09.030
Примечания : Cited References: 47. - The reported study was supported by the Russian Science Foundation (project no. 19-72-00023 ). X-ray and dilatometric data were obtained using the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS”
Аннотация: We report the influence of anisotropy and texture on elasto(ElCE)- and baro(BCE)-caloric effects in single-crystal and ceramic (NH4)2SO4. Inverse extensive and intensive ElCE in ceramics, (ΔSElCE)cer = 87 J/kg·K; ΔTAD = - 11.6 K), as well as in a single crystal along the ferroelectric axis a, (ΔSElCE)a = 115 J/kg·K; (ΔTAD)a = - 16 K, significantly exceed BCE, ΔSBCE = 75 J/kg·K; ΔTAD = - 9.8 K, even at low pressure ~ 0.3 GPa. Caloric parameters of ammonium sulphate are comparable with those for promising solid-state refrigerants.
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