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Experimental observation of symmetry protected bound state in the radiation continuum in the periodic array of ceramic disks / A. A. Bogdanov [et al.] // 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. - 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).
Кл.слова (ненормированные):
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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Держатели документа:
Department of Photonics and Metamateials, ITMO University, St.Petersburg, 197101, Russian Federation
Ioffe Institute, St. Petersburg, 194021, Russian Federation
St.Petersburg Academic University, Khlopina 8/3, St.-Petersburg, 194021, Russian Federation
Giricond Research Institute, Ceramics Co. Ltd., Saint Petersburg, 194223, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bogdanov, A. A.; Balezin, M.; Kapitanova, P. V.; Sadrieva, Z.; Belyakov, M. A.; Nenasheva, E. A.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures(5 ; 2008 ; 2 - 5 April ; Saint Petersburg)
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Magnetic Resonance Imaging of Water Absorption by Highly Porous Ceramic Materials / E. V. Morozov [et al.] // Dokl. Chem. - 2019. - Vol. 484, Is. 2. - P. 44-47, DOI 10.1134/S0012500819020058. - 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. . - ISSN 0012-5008
Кл.слова (ненормированные):
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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Публикация на русском языке Магнитно-резонансная томография водопоглощения высокопористыми керамическими материалами [Текст] / Е. В. Морозов [и др.] // Докл. Акад. наук. - 2019. - Т. 484 № 5. - С. 563-567

Держатели документа:
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
All-Russian Research Institute of Aviation Materials, Moscow, 105005, Russian Federation
Gubkin State University of Oil and Gas, Moscow, 119991, Russian Federation

Доп.точки доступа:
Morozov, E. V.; Морозов, Евгений Владимирович; Buznik, V. M.; Bespalov, A. S.; Grashchenkov, D. V.
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    Systematic experimental investigation of filtration losses of drilling fluids containing silicon oxide nanoparticles / A. V. Minakov [et al.] // J. Nat. Gas Sci. Eng. - 2019. - Vol. 71. - Ст. 102984, DOI 10.1016/j.jngse.2019.102984. - Cited References: 28. - The research was performed with the financial support of the Russian Science Foundation under project No. 17-79-20218. . - ISSN 1875-5100
   Перевод заглавия: Систематическое экспериментальное исследование фильтрационных потерь буровых растворов, содержащих наночастицы оксида кремния
Кл.слова (ненормированные):
Drilling fluid -- Nanoparticles -- Microsuspension -- Filtration loss -- Permeability -- Porous medium -- Ceramic filter
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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Держатели документа:
Siberian Federal University, 79 Svobodny Prospect, Krasnoyarsk, 660041, Russian Federation
Kutateladze Institute of Thermophysics, SB RAS, 1 Academica Lavrentyeva Prospect, Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences, 50/38 Academgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Minakov, A. V.; Mikhienkova, E. I.; Voronenkova, Y. O.; Neverov, A. L.; Zeer, G. M.; Zharkov, S. M.; Жарков, Сергей Михайлович
}
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    Facile synthesis of the desired red phosphor Li2Ca2Mg2Si2N6:Eu2+ for high CRI white LEDs and plant growth LED device / X. Yang [et al.] // J. Am. Ceram. Soc. - 2020. - Vol. 103, Is. 3. - P. 1773-1781, DOI 10.1111/jace.16858. - 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 . - ISSN 0002-7820. - ISSN 1551-2916
   Перевод заглавия: Простой синтез красного люминофора Li2Ca2Mg2Si2N6: Eu2+, необходимого для белых светодиодов с высоким CRI, и светодиодных устройств для роста растений

РУБ Materials Science, Ceramics
Рубрики:
IN-GLASS
   LUMINESCENCE
   PERFORMANCE
   EFFICIENT
   EMISSION
   ROUTE
Кл.слова (ненормированные):
high CRI white LEDs -- Li2Ca2Mg2Si2N6:Eu2+ -- phosphor -- plant growth LED device
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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Держатели документа:
South China Agr Univ, Coll Hort, Guangzhou, Guangdong, Peoples R China.
South China Agr Univ, Coll Mat & Energy, Guangdong Prov Engn Technol Res Ctr Opt Agr, Guangzhou 510642, Guangdong, Peoples R China.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.
Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia.

Доп.точки доступа:
Yang, Xiang; Zhang, Y.u.; Zhang, Xuejie; Chen, Jian; Huang, Haisen; Wang, Dongsheng; Chai, Xirong; Xie, Gening; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhang, Haoran; Liu, Yingliang; Lei, Bingfu
}
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Synthesis and optical properties RE2O2S:Ln (RE = La, Y; Ln = Ce, Eu, Dy, Er) / E. I. Sal'nikova [et al.] // J. Solid State Chem. - 2019. - Vol. 279. - Ст. 120964, DOI 10.1016/j.jssc.2019.120964. - Cited References: 53 . - ISSN 0022-4596
Кл.слова (ненормированные):
Oxysulfides -- Sulfates -- Rare-earth -- Reduction -- Optical ceramic -- Luminescence
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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Держатели документа:
Department of Inorganic and Physical Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Department of General Chemistry, Northern Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Center for Optical and Laser Materials Research, St. Petersburg State University, St. Petersburg, 199034, Russian Federation
Department of Physics, Lappeenranta University of Technology LUT, Lappeenranta, 53850, Finland

Доп.точки доступа:
Sal'nikova, E. I.; Denisenko, Y.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Kolesnikov, I. E.; Lahderanta, E.; Andreev, P. O.; Azarapin, N. O.; Andreev, O. V.; Basova, S. A.; Matigorov, A. V.
}
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Thermophysical study of structural phase transitions in Na0.95Li0.05NbO3 solid solution / M. V. Gorev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2016. - Vol. 80, Is. 9. - P. 1046-1050, DOI 10.3103/S1062873816090148. - Cited References: 18. - This work was supported by Southern Federal University, project no. 213.01-2014/012-VG. . - ISSN 1062-8738
Кл.слова (ненормированные):
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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Публикация на русском языке Теплофизические исследования структурных фазовых переходов в твердом растворе Na0.95Li0.05NbO3 [Текст] / М. В. Горев [и др.] // Изв. РАН. Сер. физич. - 2016. - Т. 80 № 9. - С. 1145-1149

Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Southern Federal University, Rostov-on-Don, Russian Federation

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Raevskaya, S. I.; Flerov, I. N.; Флёров, Игорь Николаевич; Malitskaya, M. A.; Raevskii, I. P.
}
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    Complex oxide with negative thermal expansion for producing ceramic matrix composites with invar effect / E. S. Dedova [et al.] // 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. - 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.
   Перевод заглавия: Комплексные оксиды с отрицательным тепловым расширением для получения керамических композитов с инварным эффектом
Кл.слова (ненормированные):
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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Доп.точки доступа:
Dedova, E. S.; Pertushina, M. U.; Kondratenko, A. I.; Gorev, M. V.; Горев, Михаил Васильевич; Kulkov, S. N.; International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016(Tomsk)(19-23 Sept. 2016)
}
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    Microstructure and phase composition of the two-phase ceramic synthesized from titanium oxide and zinc oxide / G. M. Zeer [et al.] // Sci. Sinter. - 2018. - Vol. 50, Is. 2. - P. 173-181, DOI 10.2298/SOS1802173Z. - Cited References: 22 . - ISSN 0350-820X
   Перевод заглавия: Микроструктура и фазовый состав двухфазной керамики, синтезированной из оксидов титана и цинка
Кл.слова (ненормированные):
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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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation

Доп.точки доступа:
Zeer, G. M.; Zelenkova, E. G.; Nikolaeva, N. S.; Zharkov, S. M.; Жарков, Сергей Михайлович; Abkaryan, A. K.; Mikheev, A. A.
}
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Bound state in the continuum in 1D chain of dielectric disks: Theory and experiment / M. Balyzin [et al.] // 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. - Cited References: 11. - This work is supported by RSF (17-12-01581)
Кл.слова (ненормированные):
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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Держатели документа:
Department of Nanophotonics and Metamaterials, ITMO University, Saint-Petersburg, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Balyzin, M.; Sadrieva, Z.; Belyakov, M. A.; Kapitanova, P.; Sadreev, A. F.; Садреев, Алмаз Фаттахович; Bogdanov, A.; International Conference on Metamaterials and Nanophotonics(3rd ; 17 - 21 September 2018 ; Sochi, Russian Federation)
}
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10.

    Ultra-narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry / Y. Wei [et al.] // J. Am. Ceram. Soc. - 2019. - Vol. 102. - P. 2353– 2369, DOI 10.1111/jace.16127. - 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). . - ISSN 0002-7820
   Перевод заглавия: Ультра-узкое синее излучение Eu2 + в галогенированных (алюмо)боратных системах с высокой решеточной симметрией
Кл.слова (ненормированные):
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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Держатели документа:
Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, China
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan
National Synchrotron Radiation Research Center, Hsinchu, Taiwan
School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong, China

Доп.точки доступа:
Wei, Y.; Qu, X.; Li, G.; Cheng, Z.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Lin, C. C.; Chan, T. -S.; Chang, C. -K.; Chuang, Y. -C.; Lin, J.
}
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