Қазақ ұлттық қыздар педагогикалық университеті / Казахский национальный женский педагогический университет

Постоянный URI для этого сообществаhttps://cris.qyzpu.kz/handle/123456789/1

Просмотр

Результаты поиска

Показано: 1 - 6 из 6
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    SYNTHESIS AND X-RAY ANALYSIS OF COMPLEX FERRITE BILIFE2O5.
    The paper describes the synthesis and X-ray study of a complex structure of ferrite BiLiFe2O5. Ferrite with mixed complex oxide BiLiFe2O5 was synthesized by high temperature solid state reaction. The structure
  • Некоторые метрики заблокированы вашими 
    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 вашими 
    Тип записи:Публикация,
    Synthesis and X-Ray Analysis of Complex Ferrites
    (Trans Tech Publications, 2017-07-01) ; ;
    Siddharth Saxena
    ;
    ;
    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 вашими 
    Тип записи:Публикация,
    Synthesis and Analysis of Chromium and Calcium Doped YMNO3
    Oriental Journal of Chemistry is a peer reviewed quarterly research journal of pure and applied chemistry. It publishes standard research papers in almost all thrust areas of current chemistry of academic and commercial importance. It provides a platform for rapid publication of quality research papers, reviews and chemistry letters. Oriental Journal of Chemistry is abstracted and indexed in almost all reputed National and International agencies.
    Цитирования (OpenAlex) 4Цитирования (OpenCitations) 3
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Structure Property–Application Relationships of Spinel Ferrite Nanoparticles: From Synthesis to Functional Systems
    (Multidisciplinary Digital Publishing Institute, 2026-02-24) ; ; ; ;
    Krishnamoorthy Ramachandran
    ). The physicochemical principles, advantages, and limitations of various synthesis techniques-including co-precipitation, combustion, sol-gel, thermal decomposition, hydrothermal, solvothermal, microwave-assisted, sonochemical, electrochemical, and solid-state reaction methods-are comparatively discussed. The influence of synthesis parameters on crystal structure, morphology, and cation distribution between tetrahedral and octahedral sites, as well as on magnetic, dielectric, and optical properties, is critically analyzed. Furthermore, the capabilities of characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS), Fourier-transform infrared spectroscopy (FTIR), FT-Raman spectroscopy, dielectric measurements, and magnetic measurements for investigating spinel ferrites are comprehensively summarized. Finally, the high potential of spinel ferrite nanoparticles for applications in electronics, microwave devices, water treatment, catalysis, sensors, and biomedical fields is highlighted.
    Цитирования (OpenAlex) 28
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Structural and Functional Properties of the Oxide System LaCaCuVMnO7.5 and Its Composites with YBa2Cu3Ox
    (Multidisciplinary Digital Publishing Institute, 2026-07-06)
    Zhenisgul Imangalievna Sagintaeva
    ;
    Shuga Bulatovna Kasenova
    ;
    Bulat Kunurovich Kasenov
    ;
    Erbolat Ermekovich Kuanyshbekov
    ;
    Aigul Tanirbergenovna Ordabaeva
    Oxide systems with the nominal composition LaCaCuVMnO7.5 and composites modified with the YBa2Cu3Ox phase were synthesized by the solid-state reaction method. The phase composition and structural features were systematically investigated by X-ray diffraction (XRD), Rietveld refinement, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM–EDX). The parent oxide was found to form a two-phase system, consisting of an orthorhombic perovskite-like phase and a cubic manganite–vanadate phase, whereas the introduction of 10 wt.% YBa2Cu3Ox resulted in the formation of a three-phase composite containing an additional cuprate phase. Thermophysical investigations in the 298–673 K range revealed λ-type-like anomalies in the heat capacity, which may be associated with possible structural or interphase transformations in the investigated oxide systems. The incorporation of YBa2Cu3Ox significantly modified the temperature dependence of heat capacity and increased its values over both low- and high-temperature regions. Electrophysical measurements in the 293–483 K range confirmed the semiconducting nature of conductivity, while the addition of YBa2Cu3Ox reduced electrical resistance and enhanced dielectric permittivity. These findings demonstrate that YBa2Cu3Ox modification provides an effective route for tuning the thermophysical and electrophysical properties of LaCaCuVMnO7.5-based oxide systems, suggesting their potential as promising candidates for multifunctional oxide materials with possible electronic and sensor-related applications.