Yttrium-doped titanium dioxide nanoparticles were synthesized by a hydrothermal method and characterized Fourier transform infrared spectroscopy, diffuse reflectance transmission electron microscopy, scanning X-ray diffraction small-angle scattering. To obtain particles with improved photocatalytic properties minimal carbon content of residual organic derivatives, optimal conditions selected for washing solvents subsequent thermal annealing. demonstrated higher activity compared to the...

Purpose of research. To determine the influence red colloidal quantum dots with CdSe/CdS/ZnS structure on luminous efficiency and color rendering index LED devices.Methods. Microscopic, fluorescent micro-X-ray studies a silicone composite phosphor powder yttrium-aluminum garnet in white LEDs single InGaN chip as 453.7 nm excitation source were carried out. Goniophotometric measurements spatial distribution intensity together spectrocolorimeter made it possible to LEDs.Results. The mixture...

Purpose. Development and study of real-time neutron radiation spectrometers with an energy range from thermal to fast neutrons.Methods. The following methods are used in the work: mathematical modeling, experimental research methods, circuit design engineering.Results. scientific basis for a new method spectrometry arbitrary spectrum shape 0.001 eV 20 MeV reconstruction measured flux based on responses several detectors different spectral characteristics using neural network trained sample...

The tunable magnetic properties of amorphous ferromagnetic glass-coated microwires make them suitable for a wide range applications. Accurate knowledge the micromagnetic structure is highly desirable since it affects almost all properties. To select an appropriate wire-sample specific application, deeper understanding magnetization reversal process required, because determines measurable response (such as induced voltage waveform and its spectrum). However, experimental observation...

Purpose of research. Determine the effect on photoluminescence phosphors from yttrium-aluminum garnet activated by cerium ions Ce3+, size its particles and concentration in them. Methods . Structural electron confocal microscopic, fluorescent, microspectral studies using a laser lex = 473 nm as an excitation source, energy dispersive, X-ray diffraction studies, well goniophotometric measurements radial distribution light intensity excited LED matrix were carried out. Results A detailed...

The bi- and tri- layered magnetoelectric composites were fabricated from magnetic Fe49Rh51 piezoelectric PbZr0.53Ti0.47O3 materials. It was shown the electric field-induced stresses reduce magnetization around phase transition temperature of Fe49Rh51: by 5.4% for tri-layer PZT/FeRh/PZT composite 3.6% bi-layer FeRh/PZT composite. properties studied at 320 K, rate estimated field 0.5 T. heterogeneous distributions in volume layer under applied fields demonstrated using COMSOL Multiphysics...

Technological modes of forming a polymer composite material based on fluoropolymer and quartz fabric are investigated. Planning experiment is carried out. Mathematical processing the results performed. Experiments were performed industrial equipment. The characteristics have been improved.

We report the results of studies magnetic and transport properties Fe49Rh51 alloy prepared by different sequences quenching annealing process. The temperature dependences relative initial permeability resistivity are analyzed. An optimal regime consisting at 1300 K for 440 min from to 275 is found observe desired narrow antiferromagnetic–ferromagnetic transition in under cyclic conditions. This has potential increase efficiency cooling devices based on magnetocaloric effect materials with a...

The three-layer magnetoelectric composite PZT/FeRh/PZT consisting of a layer magnetic alloy Fe49Rh51 and two layers piezoelectric PbZr0.53Ti0.47O3 was fabricated, its properties were studied. Analysis the temperature dependences susceptibility demonstrated phase transition at ~324 K in heating regime ~315 cooling. observed corresponds to magnetostructural transformation from antiferromagnetic state ferromagnetic one. Application voltage across induces mechanical stress on that leads decrease...

Purpose of the study . Study and comparison antioxidant properties ablated cerium dioxide nanoparticles in oxidative photocatalytic degradation methylene blue from imported laboratory targets. Methods By pressing powder annealing pressed target, targets were obtained, which subjected to laser ablation process. Atomic force microscopy was used characterize nanoparticles. The spectrophotometric method activity obtained two an reaction has been studied compared. Cerium with high by ablation....

This research work was aimed to nd the composition of equiatomic FeRh alloy and way preparation samples with extremely narrow thermal hysteresis repeatable results.Alloys content Fe from 48 up 52 at.% were examined.FeRh alloys prepared in forms bulk piece, plate wire.The plates found be more perspective for further investigations.The inuence parameters ingot treatments on antiferromagnetic-ferromagnetic transition studied.The ways narrowing temperature established.

Addition into the cement concrete fine dispersed basalt fiber allows to increase properties of concretes and high strength concretes. Widespread usage this type reinforcement is limited by insufficient research changes in matrix. Research was made comprised matrix with aid optic electronic microscope magnification up 10000. It established a damage structure fiber.

Purpose. Study of the bioprotective properties ablated cerium dioxide nanoparticles in relation to immortalized human fibroblasts under conditions oxidative stress caused by Fenton reaction. Methods. Cerium with pronounced antioxidant were obtained using laser ablation. The average maximum sizes particles oxidized non-centrifuged and centrifuged at a speed 1000 rpm nanodispersed aqueous solutions revealed method atomic force microscopy. spectrophotometric that exhibit prevent degradation...

Синтезированы направленно закристаллизованные монокристаллические эвтектики InSb-MnSb и выполнены исследования их электрических свойств. Игольчатые включения с высоким аспектным соотношением ферромагнитного металла MnSb располагаются параллельно в полупроводниковой матрице InSb. Температурные зависимости удельного сопротивления демонстрируют наличие высокой анизотропии свойств образцах различной ориентацией направления электрического тока игольчатых включений MnSb. При достаточно эффективной...

Purpose of the study . To characterize size composition, atomic and electronic structure, antioxidant activity Cerium dioxide nanoparticles synthesized by hydrothermal method in an autoclave. Methods were autoclave at 150°C. The composition was characterized small-angle X-ray scattering diffractometry. structural phase studied using Scanning electron microscopy with energy-dispersive analysis attachment used to analyze elemental samples. Antioxidant photochemical degradation reaction...