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Uniaxial mechanical stresses and their influence on the parameters of the ferroelectric phase transition in pressure-treated barium titanate / A. M. Pugachev [et al.] // Ferroelectrics. - 2017. - Vol. 508, Is. 1. - P. 161-166, DOI 10.1080/00150193.2017.1289769. - Cited References: 22 . - ISSN 0015-0193
Кл.слова (ненормированные):
BaTiO3 -- second harmonic generation -- residual mechanical stresses -- ferroelectric phase transition
Аннотация: The dependence of the E(TO) line in Raman spectrum of a BaTiO3 powder on applied uniaxial pressure up to 14 GPa are obtained and the values of residual mechanical stresses are evaluated. The second harmonic generation technique is used to obtain the width and temperature of the cubic-to-tetragonal phase transition in the powder treated by uniaxial pressures. The interrelations between the phase transition width, temperatures, and residual mechanical stresses are established. These interrelations differ from expectations based on known hydrostatic pressure-induced effects in BaTiO3.

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Держатели документа:
Institute of Automation and Electrometry RAS, Novosibirsk, Russian Federation
Novosibirsk State University, Novosibirsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
V. S. Sobolev Institute of Geology and Mineralogy RAS, Novosibirsk, Russian Federation

Доп.точки доступа:
Pugachev, A. M.; Zaytseva, I. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Malinovsky, V. K.; Surovtsev, N. V.; Borzdov, Y. M.; Kovalevsky, V. I.
}
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Thermal expansion and permittivity of (Ba1-xBi2x/3)TiO3 solid solutions / M. V. Gorev [et al.] // Phys. Solid State. - 2011. - Vol. 53, Is. 10. - P. 2073-2079, DOI 10.1134/S1063783411100143. - Cited References: 24. - This study was supported by the Council on Grants from the President of the Russian Federation for the Support of Leading Scientific Schools (grant NSh-4645.2010.2). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
BARIUM-TITANATE
   CERAMICS
   BATIO3
   BEHAVIOR
   PHASE
   FERROELECTRICS
Аннотация: The strain, the thermal expansion coefficient, and the permittivity of ceramic samples of (Ba1 - x Bi-2x/3)TiO3 solid solutions with x = 0, 0.01, 0.03, and 0.05 have been studied in the temperature range 120-700 K. Based on an analysis of the results, the temperature-composition phase diagram has been refined, and the temperature dependence of the polarization has been calculated.

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Держатели документа:
[Gorev, M. V.
Flerov, I. N.
Bondarev, V. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Gorev, M. V.
Bondarev, V. S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Maglione, M.
Simon, A.] Univ Bordeaux 1, ICMCB CNRS, Pessac, France
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Science, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk 660041, Russian Federation
ICMCB-CNRS, Universite de Bordeaux 1, Pessac, France

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Maglione, M.; Simon, A.
}
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Temperature Raman study of Li4Ti5O12 and ambiguity in the number of its bands / A. A. Nikiforov, A. S. Krylov, S. N. Krylova [et al.] // J. Raman Spectrosc. - 2024. - Vol. 55, Is. 3. - P. 406-415, DOI 10.1002/jrs.6641. - Cited References: 51. - The research was funded by the Russian Science Foundation (project No 22-22-00350, https://rscf.ru/project/22-22-00350) . - ISSN 0377-0486. - ISSN 1097-4555
Кл.слова (ненормированные):
defects -- distortions -- lithium titanate -- lithium titanium oxide -- spinel structure
Аннотация: The two primary physical methods for identifying lithium titanate, a negative electrode material used commercially, are X-Ray diffraction and Raman spectroscopy. Although there are many publications on this topic, they are focused mainly on chemistry, so there are still some points that require clarification from a physical and methodological point of view. Difference of experimentally observed and theoretically predicted Raman spectra was explained through a combination of experiments and computations. The work comprises experiments and computations to explain why there are different numbers of predicted and observed Raman-active bands. Our low-temperature study and the analysis of thermal shifts during heating led us to conclude that the approach with surplus bands is advantageous and we recommend using major F2g band shifts to estimate the sample heating.

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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, Russia
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russia
Independent Researcher, Ekaterinburg, Russia

Доп.точки доступа:
Nikiforov, A. A.; Krylov, A. S.; Крылов, Александр Сергеевич; Krylova, S. N.; Крылова, Светлана Николаевна; Gorshkov, V. S.; Pelegov, D. V.
}
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Synthesis, crystal structure, and thermal properties of substituted titanates Bi2Pr2Ti3O12 and Bi2Nd2Ti3O12 / L. T. Denisova, M. S. Molokeev, N. A. Galiakhmetova [et al.] // Phys. Solid State. - 2021. - Vol. 63. Is. 8. - P. 1159-1164, DOI 10.1134/S1063783421080084. - Cited References: 39. - This study was carried out in part within the state assignment for the Siberian Federal University, project no. FSRZ-2020-0013 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
BI4-XRXTI3O12 R-X
   PHASE-EQUILIBRIA
   HEAT-CAPACITY
   ND
   BI4TI3O12
   PR
Кл.слова (ненормированные):
substituted bismuth titanate -- solid-state synthesis -- crystal structure -- high-temperature heat capacity -- thermodynamic functions
Аннотация: Titanates Bi2Pr2Ti3O12 and Bi2Nd2Ti3O12 have been obtained by the solid-phase synthesis using sequential annealing of the Bi2O3, Nd2O3, Pr6O11, and TiO2 stoichiometric mixtures in air at temperatures of 1003–1323 K. Their crystal structure has been established by X-ray diffractometry and the high-temperature heat capacity has been determined by differential scanning calorimetry. Based on the experimental Cp = f(T) data, the main thermodynamic functions have been calculated.

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Публикация на русском языке Синтез, кристаллическая структура и теплофизические свойства замещенных титанатов Bi2Pr2Ti3O12 и Bi2Nd2Ti3O12 [Текст] / Л. Т. Денисова, М. С. Молокеев, Н. А. Галиахметова [и др.] // Физ. тверд. тела. - 2021. - Т. 63 Вып. 8. - С. 1056-1061

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Galiakhmetova, N. A.; Denisov, V. M.; Vasil'ev, G. V.; [FSRZ-2020-0013]
}
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Synthesis, Crystal Structure and Thermodynamic Properties of LuGaTi2O7 / L. T. Denisova, M. S. Molokeev, L. G. Chumilina [et al.] // Inorg. Mater. - 2020. - Vol. 56, Is. 12. - P. 1242-1247, DOI 10.1134/S0020168520120055. - Cited References: 25 . - ISSN 0020-1685
Кл.слова (ненормированные):
lutetium gallium titanate -- mixed oxide compounds -- high-temperature heat capacity -- thermodynamic properties
Аннотация: Single-phase LuGaTi2O7 samples have been prepared by solid-state reaction in a starting mixture of Lu2O3, Ga2O3, and TiO2 via sequential firing in air at temperatures of 1273 and 1573 K. The crystal structure of the lutetium gallium dititanate has been determined by the Rietveld method (profile analysis of X-ray diffraction patterns of polycrystalline powders): sp. gr. Pcnb; a = 9.75033(13) Å, b = 13.41425(17) Å, c = 7.29215(9) Å, V = 957.32(2) Å3, d = 6.28 g/cm3. The heat capacity of LuGaTi2O7 has been determined as a function of temperature by differential scanning calorimetry in the range 320–1000 K. The Cp(T) data thus obtained have been used to calculate the principal thermodynamic functions of the oxide compound.

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Публикация на русском языке Синтез, кристаллическая структура и термодинамические свойства LuGaTi2O7 [Текст] / Л. Т. Денисова, М. С. Молокеев, Л. Г. Чумилина [и др.] // Неорган. матер. - 2020. - Т. 56 № 12. - С. 1311-1316

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center (Federal Research Center), Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 119991, Russian Federation
Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chumilina, L. G.; Kargin, Y. F.; Denisov, V. M.; Ryabov, V. V.
}
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Stability and thermoelectric properties of mechano-activated solid solutions of Sr1-xLnxTiO3-δ (Ln = Nd, Gd, Dy) / Y. S. Orlov, S. N. Vereshchagin, L. A. Solovyov [et al.] // J. Taiwan Inst. Chem. Eng. - 2022. - Vol. 138. - Ст. 104449, DOI 10.1016/j.jtice.2022.104449. - Cited References: 39. - This study was supported by the Russian Foundation for Basic Research, project no. 20-52-04008 Bel_mol_a. Thermal analysis was performed within the scope of Budget Project No. 0287-2021-00-13 for the Institute of Chemistry and Chemical Technology SB RAS . - ISSN 1876-1070
Кл.слова (ненормированные):
Strontium titanate solid solutions -- Thermoelectric oxide materials -- Mechanochemical activation -- Electron microscopy
Аннотация: Background: The effect of mechanochemical activation on the microstructure, morphology, and thermoelectric parameters of the materials leading to an increase in the power factor (PF) is demonstrated by the example of the Sr1-xLnxTiO3-δ (Ln = Nd, Gd, Dy; x = 0.05, 0.075, 0.1) solid solutions. Methods: The strontium titanate solid solutions have been synthesized using a conventional ceramic technology from particles of different sizes obtained by mechanical activation of annealed ceramics. Findings: It is shown that different sizes of initial particles cause the morphological and microstructural differences and significantly affect the stability and thermoelectric properties of the synthesized samples. It has been established that a decrease in the initial particle size ensures the thermal stability of the samples and leads to an increase in their electrical conductivity and PF at the minor variation in the Seebeck coefficient. The PF of the Sr0.925Nd0.075TiO3 solid solution changes by a factor of 7. It has been found that the mechanically activated samples have the much lower porosity than the nonactivated ones, which noticeably reduces the effective area of their interaction with the environment (oxygen release and absorption); therefore, all the measurement data obtained on the mechanically activated samples upon their heating and cooling are reversible.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 24, Krasnoyarsk, 660036, Russian Federation
SSPA "Scientific-Practical Materials Research Centre of NAS of Belarus", 19 P. Brovki st.Minsk 220072, Belarus

Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Vereshchagin, S. N.; Solovyov, L. A.; Borus, A. A.; Борус, Андрей Андреевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Nikitin, A. V.; Bushinsky, M. V.; Lanovsky, R. A.; Rymski, G. S.; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич
}
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    Review of lead-free Bi-based dielectric ceramics for energy-storage applications / L. S. Li, P. Y. Fan, M. Q. Wang [et al.] // J. Phys. D. - 2021. - Vol. 54, Is. 29. - Ст. 293001, DOI 10.1088/1361-6463/abf860. - Cited References: 177. - The authors gratefully acknowledge the support of the National Natural Science Foundation of China (Nos. 51672092, U1732117 and 51902111), the China Postdoctoral Science Foundation (No. 2019M662602), the Natural Science Foundation of Guangxi (AA138162, GA245006, FA198015, and AA294014), the High-Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes, and the Open Fund of the Guangxi Key Laboratory of Information Materials (No.191015-K). The authors thank the projects supported by the Guangdong HUST Industrial Technology Research Institute, the Guangdong Provincial Key Laboratory of Digital Manufacturing Equipment (2020B1212060014) and the DongGuan Innovative Research Team Program (2020607101007). The authors wish to thank the Analytical and Testing Center of Huazhong University of Science and Technology for their help with related tests. In particular, the authors appreciate the valuable suggestions and comments made by the the anonymous reviewers and the editor, Professor Huiyun Liu . - ISSN 0022-3727. - ISSN 1361-6463
   Перевод заглавия: Обзор: Bi-содержащие бессвинцовые керамики для устройств хранения энергии

РУБ Physics, Applied
Рубрики:
TRANSMISSION ELECTRON-MICROSCOPY
STRONTIUM-TITANATE CERAMICS
Кл.слова (ненормированные):
dielectric materials -- energy storage -- lead-free -- Bi-based ceramics
Аннотация: Dielectric energy-storage ceramics have the advantages of high power density and fast charge and discharge rates, and are considered to be excellent candidate materials for pulsed power-storage capacitors. At present, the application of dielectric energy-storage ceramics is hindered by their low energy density and the fact that most of them contain elemental lead. Therefore, lead-free dielectric energy-storage ceramics with high energy storage density have become a research hot spot. In this paper, we first present the requirements that dielectric energy-storage capacitors impose on the properties of ceramic materials. We then review our previous research work combined with research progress into bismuth (Bi)-based lead-free energy-storage ceramics including Bi0.5Na0.5TiO3 (BNT), BiFeO3, and Bi0.2Sr0.7TiO3, in which the composition design ideas and related energy-storage characteristics of BNT-based lead-free energy-storage ceramics are emphasized. At the same time, we highlight the problems faced by Bi-based lead-free energy-storage ceramics and some strategies for addressing them. Finally, we examine the future prospects of research into Bi-based lead-free energy-storage ceramics.

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Держатели документа:
Huazhong Univ Sci & Technol, State Key Lab Mat Proc & & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China.
Guangdong HUST Ind Technol Res Inst, Dongguan 523808, Peoples R China.
Fukuoka Univ, Fac Sci, Fukuoka 8140180, Japan.
Brno Univ Technol, Cent European Inst Technol CEITEC, Brno, Czech Republic.
RAS, SB, Kirensky Inst Phys, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
Tsinghua Univ, Sch Vehicle & Mobil, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China.
Guilin Univ Technol, Guangxi Key Lab Opt & Elect Mat & Devices, Guilin 541004, Peoples R China.

Доп.точки доступа:
Li, Lisong; Fan, Pengyuan; Wang, Mengqi; Takesue, Naohisa; Salamon, David; Vtyurin, A. N.; Втюрин, Александр Николаевич; Zhang, Yangjun; Tan, Hua; Nan, B.o.; Lu, Y.a.; Liu, Laijun; Zhang, Haibo
}
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Zhandun, V. S.
Lattice dynamics, ferroelectric and antiferroeelctric instabilities, and the ferroelectric phase transition in disordered PbB(1/2)' B(1/2)'' O(3) (B ' = Ga, In, Lu; B '' = Nb, Ta) solid solutions / V. S. Zhandun, N. G. Zamkova, V. I. Zinenko // J. Exp. Theor. Phys. - 2008. - Vol. 106, Is. 6. - P. 1109-1117, DOI 10.1134/S1063776108060101. - Cited References: 29 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
STATISTICAL-MECHANICS
   PEROVSKITES
   CRYSTALS
   ORDER
   RELAXOR
   BATIO3
   PBTIO3
Кл.слова (ненормированные):
Crystal lattices -- Ferroelectricity -- Lattice vibrations -- Solids -- Ferroelectric (barium strontium titanate) -- Ferroelectric phase transitions -- Lattice (CO) -- Lattice dynamics -- Vibration spectrum -- Ferroelectric materials
Аннотация: The lattice vibration spectra, rf permittivity, and dynamic Born charges of disordered PbB(1/2)'B(1/2)'' O(3) (B' = Ga, In, Lu; B '' = Nb, Ta) solid solutions are calculated in terms of the generalized Gordon-Kim model. All the compounds are found to have soft modes related to the center (Gamma(15)) and boundary point R (R(15)) of the Brillouin zone; the frequencies of these modes are close. The ferroelectric phase transition temperatures and the spontaneous polarization in the ferroelectric phase are calculated for the solid solutions using a model Hamiltonian in the local mode approximation and the Monte Carlo method. These temperatures for the tantalum compounds are found to be higher than for the niobium compounds, and temperature t(s) increases with the atomic number of ion B'. A model where the antiferroelectric state is related to the condensation of modes Gamma(15) and R(15) is proposed. It is found that, for all compounds except for PbSc(1/2)Nb(1/2)O(3) and PbSc(1/2)Ta(1/2)O(3), the ferroelectric phase, which is only related to the condensation of mode R(15), and the antiferroelectric phase have similar energies. In PbIn(1/2)Ta(1/2)O(3), the antiferroelectric phase turns out to be energetically favorable.

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Держатели документа:
[Zhandun, V. S.
Zamkova, N. G.
Zinenko, V. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Zamkova, N. G.; Замкова, Наталья Геннадьевна; Zinenko, V. I.; Зиненко, Виктор Иванович; Жандун, Вячеслав Сергеевич
}
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Investigations of residual stresses in barium titanate pressed powder and their effects to the properties of the ferroelectric phase transition / I. V. Zaytseva [et al.] // Second International Workshop "Modern Nanotechnologie" (IWMN-2016) : abstact book / Урал. Фед. ун-т им. Первого Президента России Б. Н. Ельцина. - 2016. - Ст. O-22. - P. 47. - References: 3

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Доп.точки доступа:
Zaytseva, I. V.; Зайцева И. В.; Krylov, A. S.; Крылов, Александр Сергеевич; Pugachev, A. M.; Пугачев А. М.; Malinovsky, V. K.; Малиновский В. К.; "Modern Nanotechnologies", International Workshop(2 ; 2016 ; Aug. ; 27-29 ; Ekaterinburg); Уральский Федеральный университет им. Первого Президента России Б.Н. Ельцина
}
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10.

Formation of phases and microstructure of ZnO and TiO2 based ceramic / G. M. Zeer [et al.] // Glass Ceram. - 2015. - Vol. 72, Is. 7-8. - P. 242-245, DOI 10.1007/s10717-015-9765-8. - Cited References:15. - This work was supported in part by the Russian Foundation for Fundamental Research (Grant No. 13-08-01003-a) and the Ministry of Education of the Russian Federation (as part of scientific research tasked by the state to the Siberian Federal University for 2014). . - ISSN 0361-7610. - ISSN 1573-8515

РУБ Materials Science, Ceramics
Рубрики:
GLASS ENAMEL COATINGS
NANOWIRES
Кл.слова (ненормированные):
electrocontact materials -- metal oxides -- zinc titanate -- nanopowders -- ceramic -- microstructure -- phase formation
Аннотация: Nanopowders of zinc and titanium oxides were used to obtain samples of Zn2TiO4-ZnO ceramic. Phase formation as well as the microstructure and elemental composition of the phases formed were studied by means of electron microscopy. The density and porosity were calculated, and the sizes of grains and pores in the ceramic were determined. The temperature at the zinc titanate forms was determined. It was shown that it corresponds to the sintering temperature of electrocontact materials with this composition. It is proposed that zinc titanate and oxide be used as arc-suppressing and dispersion-hardening additional additives in copper-based electrocontact materials.

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Публикация на русском языке Формирование фаз и микроструктуры керамики на основе ZnO и TiO2 [Текст] / Г. М. Зеер [и др.] // Стекло и керамика. - 2015. - № 7. - С. 16-19

Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk, Russia.
MF Reshetnev Siberian State Aerosp Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Zeer, G. M.; Zelenkova, E. G.; Nikolaeva, N. S.; Zharkov, S. M.; Жарков, Сергей Михайлович; Pochekutov, S. I.; Ledyaeva, O. N.; Sartpaeva, A. B.; Mikheev, A. A.; Russian Foundation for Fundamental Research [13-08-01003-a]; Ministry of Education of the Russian Federation
}
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