Жарияланымдар / Публикации
Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/2
Просмотр
12 результаты
Результаты поиска
- Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Synthesis and X-Ray Analysis of Complex Ferrites(Trans Tech Publications, 2017-07-01); ; ; Ferrite with mixed complex oxides BiNaFe2O5, BiKFe2O5 was synthesized by high temperature solid state reaction. The structure of the ferrites, type of syngony, parameters of the unit cells, radiographic and pycnometric densities were determined by X-ray phase analysis for a first time: BiNaFe2O5 – а=5,577, с=13,86 Å, γ=120º, Vun.cell. = 373,9 Å3, Z=4, ρrad.= 7,5262 г/см3, ρpicn.=7,5271 г/см3, BiKFe2O5 –а=5,545, с=13,65 Å, γ=120º, Vun.cell.= 363,45Å3, Z=6, ρrad.= 8,0367, ρpicn.=8,0375 г/см3. A comparative analysis of the relationship between crystal lattice parameters with parameters of the crystal lattice of initial oxides and complex ferrites has been performed. Research dependence of the magnetic moment of the complex ferrite BiNaFe2O5 of the applied magnetic field at a constant temperature T = 6.1405 K showed a paramagnetic shift in the structure.Цитирования (OpenAlex) 3Цитирования (OpenCitations) 3 - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Synthesis and X-ray analysis of complex ferrite YbBiNaFe2O6,5(Al-Farabi Kazakh National University, 2017-06-30); ; The complex oxide phase of the composition YbBiNaFe2O6,5 was synthesized by the high-temperature solid-phase reaction. X-ray diffraction analysis was used to study the structure for the first time; the type of syngony, unit cell parameters, X-ray diffraction and pycnometric densities were determined. X-ray diffraction was carried out by homology method from the initial fluorite structure δBi2O3. The method of least squares refined the parameters of the crystal lattice. The parameters of the orthorhombic lattice of complex mixed ferrite at the value of the number of formula units Z=4 are: a=5.2319, в=5.2186, с=7.5702 Å. The correctness of the results of the X-ray diffraction of complex mixed ferrite was confirmed by the good agreement between the experimental and calculated values of the inverse squares of the interplanar distances (104/d2). Satisfactory consistency of the values of the X-ray and pycnometric densities, ρrad = 8.335, ρpik = 8.328 g/cm3, proves the correctness of the results of the experiment. A comparative analysis of the interrelation between the parameters of the crystal lattice and the parameters of the crystal lattices of the initial oxide δBi2O3. The analysis shows the values of the parameters “a” and “c” are in satisfactory agreement with the parameters of the crystal lattice δBi2O3, the parameter “c” is distorted from the value of the parameter “a” on √2. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Synthesis and Magnetic Properties of Crystals Bi₂BaFe₄O₁ ₀The paper presents the results of an experimental study of the first synthesized compound in the system Bi2O3-BaO-Fe2O3.It was found that the compound has cubic symmetry, the lattice parameters was determined.Electron microscopy measurements reveal that, in general, elemental composition of different parts of the samples corresponds to Bi2BaFe4O10 formula.According to magnetic measurements, the compound has a magnetic order with the magnetic ordering temperature TC = 700 K.Цитирования (OpenAlex) 3Цитирования (OpenCitations) 3 - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Composition and structure of bismuth doped dysprosium manganite(2018-09-29); ; ; ; KezdikbayevaComposition and structure of bismuth doped dysprosium manganiteIn the present work, the multiferroic material Bi 0.8 Dy 0.2 MnO 3 was synthesized by the Pechini method for its further study.As starting materials, bismuth oxide, manganese oxide, dysprosium oxide, nitric acid and urea were used.It is shown that when nitric acid and urea are used as a precipitant, single-phase powders can be obtained.The powder was sintered at various temperatures of 600 ºC, 800 ºC, 900 ºC, respectively, in order to evaluate their optimum sintering temperature based on X-ray profiles.The incorporation of Bi 3+ ions into the perovskite crystal structure was verified by means of X-ray, SEM methods.The XRD revealed that the obtained nanocrystalline Bi 0.8 Dy 0.2 MnO 3 was cubic crystal structure of space group: Fm-3m(225) and lattice parameters were: 5.4763 Å, 5.4763 Å, 5.4763 Å, 90.000, 90.000, 90.000.The density of manganite was determined by the pycnometric method in accordance with State Standard 2211-65.Toluene served as an indifferent fluid.Satisfactory consistency of X-ray and pycnometric densities of manganite confirms the correctness of the results.The results of the electron microscope show that the atomic fractions of the elements practically coincide, which corresponds to the formula of manganite-BDMO. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, SYNTHESIS AND X-RAY DIFFRACTION STUDY OF THE CHROMITE-MANGANITESIn this work synthesized new chromite-manganite phases using sol-gel method and their composition was studied by X-ray method. Chromium oxide, manganese oxide, yttrium oxide, metal carbonates, citric acid and glycerin were used as starting materials. It is shown that the use of citric acid and glycerol as precipitant, giving a positive effect to monophase samples. Precipitate was subjected to homogenizing roast in the temperature range from 600 to 1100°C, reaching the level of sintering samples were controlled by the basis of X-ray diffraction profiles. All the X-ray reflection lines have been successfully indexed according to the orthorhombic perovskite structure with space group: Pbnm (62) and with the following parameters: Y(1-x)MgCr0,5Mn0,5O3,(x≈0,7) –а=5.557, b=7.515, с=5.252 A, Z = 4; Y(1-x)BaCr0,5Mn0,5O3, (x≈0,7) –а=9.102, b=5.533, с=7.330 A, Z = 4; Y(1-x)SrCr0,5Mn0,5O3, (x≈0,7) –а=7.109, b=7.436, с=6.756 A, Z = 4. References [1] Lewis N.S., Nocera D.G. Electromicrobiology: An Emerging Reality – A Review // Proc. Natl. Acad. Sci. USA. 2006. N 103. P. 15729. [2] Turner J.A. A Realizable Renewable Energy Future // Science. 1999. N 285. P. 687-689. [3] Kreuter W., Hofmann H. Electrolysis: the important energy transformer in a world of sustainable energy // Int. J. Hydrogen Energy. 1998. N 23. Р. 661-666. [4] Singhal S.C., Kendall K. High-temperature Solid Oxide Fuel Cells: Fundamentals, Design and Applications // High-Temperature Solid Oxide Fuel Cells: Fundamentals, Design and Applications. Elsevier Science, Oxford, UK, 2003. ISSN 1813-1107 3 2019 [5] Chroneos A., Yildiz B., Tarancon A., Parfitt D., Kilner J.A. Prediction of solid oxide fuel cell cathode activity with first-principles descriptors // Energy Environ. Sci. 2011. N 4. Р. 3966-3970. [6] Bockris J.O’M., Otagawa T. The Electrocatalysis of Oxygen Evolution on Perovskites // Elecrochem. Soc. 1984. N 131. Р. 290-302. [7] Man I.C., Su H.-Y., Calle-Vallejo F., Hansen H.A., Martнnez J.I., Inoglu N.G., Kitchin J., Jaramillo T.F., Nшrskov J.K., Rossmeisl J. Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces // ChemCatChem. 2011. N 3. Р. 1159-1165. [8] Skinner S.J. Recent advances in Perovskite-type materials for solid oxide fuel cell cathodes // Int. J. Inorg. Mater. 2001. N 3. Р. 113-121. [9] Haile S.M. Fuel cell materials and components // Acta Mater. 2003. N 51. Р. 5981-6000. [10] Jacobson A.J. Materials for Solid Oxide Fuel Cells // Chem. Mater. 2010. N 22. Р. 660-674. [11] Suntivich J., Gasteiger H.A., Yabuuchi N., Nakanishi H., Goodenough J.B., Shao-Horn Y. Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal-air batteries // Nat. Chem. 2011. N 3. Р. 546-550. [12] Hong W.T., Risch M., Stoerzinger K.A., Grimaud A., Suntivich J., Shao-Horn Y. Toward the rational design of non-precious transition metal oxides for oxygen electrocatalysis // Energy Environ. Sci. 2015. N 8. Р. 1404-1427. [13] Shabanova N.A., Sarkisov P.D. Osnovy zol-gel tehnologii nanodispersnogo kremnezema. M.: IKTs «Akademkniga», 2004. 208 p. [14] Kasenov B.K., Kasenova Sh.B., Sagintaeva J.I. Dvoinye i troinye manganity, ferrity i khromity elochnyh, elochnozemelnyh i redkozemelnyh metallov // M., 2017. [15] Mataev M.M., Saxena S.M., Patrin G.S., Tursinova Zh.Y., Kezdikbayeva A.T., Nurbekova M.A., Baitasheva G.U. Manganite synthesis by different methods // Oriental jornal of chemistry. 2018. N 34(3). P. 1312-1316. [16] Mataev M.M., Patrin G.S., Tursinova Zh.Y., Abdraimova M.R.,Yurkin G.Yu. Synthesis and Magnetic Properties of crystals Bi2BaFe4O10 // Journal of Siberian Federal University. Mathematics & Physics. 2018. N 11(4). Р. 411-415. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, SYNTHESIS AND X-RAY STUDY OF CHROMITE – GADOLINI FERRITE COMPOSITION Gd(1-Х)МeCr0.5Fe0.5O3( Me = Ca, Mg, x≈0,7)(2019-01-01); ; ; In the present work the X-ray study of the synthesized sol-gel by the method of new chromite-ferrites phases with the Gd(1-Х)МeCr0.5Fe0.5O3 (Me = Ca, Mg, x0,7) composition was presented.Chromium oxide, iron oxide, gadolinium oxide, metal carbonates, citric acid and glycerin were used as initial materials. It is shown that the use of citric acid and glycerin as a precipitator has a positive effect on monophase samples. Rainfall was subjected to homogenizing roasting in the temperature range 600-900°C. The reaching the level of sintering of samples was controlled by theX-ray diffraction profiles. The phase composition, crystal characteristics, type of the symmetry, unit cell parameters, radiographic and pycnometric densitieswere investigated by the method of X-ray phase analysis. The correctness of the X-ray diffraction results of the mixed ferrite complex was confirmed by a good agreement between the experimental and calculated values of the inverse values of the squares to the interplanar distances (104/d2). Satisfactory consistency of the X-ray values and pycnometric densities proves the correctness of the experimental results. The article presents results of synthesis and XRF studies of new complex oxide chromite–gadolinium ferrites doped with alkaline earth metals (Са, Mg). Results revealed the formation of samples with multifaceted structure. Developed oxide of the chromite – ferrite gadolinium has orthorhombic structure. References [1] Zvezdin A.K., Pyatakov A.P. Phase transitions and the giant magnetoelectric effect in multiferroics // UFN. 2004. Vol. 174, N 4. P. 465-470. [2] Devi P.S. (1993). Citrate gel processing of the perovskite lanthanide chromites // Journal of Materials Chemistry. 3(4). 373.doi:10.1039/jm9930300373. [3] Mataev M.M., Sukhodayev P.O., Tursinova Zh.I., Sarsenbaeva Z.B., Seitbek A.Zh. Synthesis, X-ray study and determination of the particle size of manganites // International scientificpractical conference “Development of education and science by modern directions in the field of chemistry, biology, ecology and geography”. 2017. P. 68-70. [4] Mataev М.М., Abdraimova M.R., Saxena S.М., Nuketaeva D.Zh., Zheksembieva B.T. Synthesis and X-Ray Analysis of Complex Ferrites // Key Engineering Materials. ISSN: 1662-9795. Vol. 744. P. 393-398. doi:10.4028/www.scientific.net/ KEM.744.393/© 2017 Trans Tech Publications, Switzerland. [5] Mataev M.M., Saxena S.M., Patrin G.S., Tursinova Zh.Y., Kezdikbayeva A.T., Nurbekova M.A., Baitasheva G.U. Manganite synthesis by different methods // Oriental journal of chemistry. 2018. Vol. 34, N 3. P. 1312-1316. [6] Mataev M.M., Patrin G.S., Tursinova Zh.Y., Abdraimova M.R., Yurkin G.Yu. Synthesis and Magnetic Properties of Crystals Bi2BaFe4O10 // Journal of Siberian Federal University. Mathematics & Physics. 2018. 11(4), 411-4. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, СИНТЕЗ И СТРУКТУРА МАНГАНИТА Bi 0.3 Dy 0.7 Mn 7 O 12Manganite with mixed complex oxides Bi 0.3 Dy 0.7 Mn 7 O 12 was synthesized by the furnace method. The Pechini method used urea as a complexing agent. The composition and structure of the synthesized manganite were determined experimentally. For the first time, the structure, the type of the syngony, the parameters of the unit cells, the x-ray diffraction density of the manganite were determined by X-ray phase analysis: a = 7.5472, b = 8.5244, c = 5.7836 A, V un.cell. = 372.090A 3 , Z = 4, ρ rad. = 7,120 g / cm 3 , ρ pyc. = 7.09 g / cm 3 . The pycnometric density was measured 5-6 times and the data were averaged. Toluene served as an indifferent fluid. - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, СТРУКТУРНЫЕ, ЭЛЕКТРОННЫЕ И МАГНИТНЫЕ СВОЙСТВАM n2CoZ(Al/Ga) ПРИ ЛЕГИРОВАНИИ ВАНАДИЕМ(2021-11-01); - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Structural, Electronic and Magnetic Properties of Mn2Co1-xVxZ (Z = Ga, Al) Heusler Alloys: An Insight from DFT Study(Multidisciplinary Digital Publishing Institute, 2021-12-08)Цитирования (OpenAlex) 13Цитирования (OpenCitations) 10 - Некоторые метрики заблокированы вашиминастройками согласия
Тип записи:Публикация, Multifaceted Characterization and Thermal Stability of Y0.5Sr0.5Cr0.5Mn0.5O3 Chromite-Manganite Synthesized via Sol-GelWe studied the thermal stability and many-sided properties of Y 0 .5 Sr 0 .5 Cr 0 .5 Mn 0 .5 O 3 chromite-manganite that was made using the sol-gel method.We focused on the syngony type, unit cell parameters, and x-ray analysis.To conirm the results of the chromite-manganite indexing, the inverse values of the squares of interplane distances (104/d2) and the consistency of the x-ray and pycnometric densities were found to be very close to each other.It was found that the synthesised chromite-manganite crystallises in orthorhombic syngony and has a perovskite-like structure.Scanning Electron Microscopy (SEM) shows that chromite-manganite is uniformly distributed, and the crystallites are sized between 6 and 20 microns.The analysis of the relationship between heat capacity and temperature using the Thermo Gravimetry Analysis (TGA) technique demonstrates the stability of the internal structure and the presence of polymorphic transformations in the sample under study.