Bulletin of the University of Karaganda-Physics最新文献_第7页

Influence of the content of aluminum on the structure of gradient detonation coatings based on NiCr-Al 铝含量对NiCr-Al基梯度爆轰涂层结构的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-09-30 DOI: 10.31489/2022ph3/18-24

M. Maulet, Zhuldyz Sagdoldina, B. Rakhadilov, D. Kakimzhanov, N. Magazov

{"title":"Influence of the content of aluminum on the structure of gradient detonation coatings based on NiCr-Al","authors":"M. Maulet, Zhuldyz Sagdoldina, B. Rakhadilov, D. Kakimzhanov, N. Magazov","doi":"10.31489/2022ph3/18-24","DOIUrl":"https://doi.org/10.31489/2022ph3/18-24","url":null,"abstract":"This paper studies the effects of aluminium content in the composite powder on the structure of detonation gradient coatings based on NiCr-Al. Gradient coatings were obtained by detonation spraying with a gradual stepwise decrease in the barrel filling volume with an acetylene-oxygen gas mixture from 50% to 25%. The elemental and phase composition, microstructure and surface roughness of coatings based on NiCr-Al with different aluminium content of 15%, 20%, and 30% were investigated. By varying the aluminium content in the powder composition, coatings with a gradient structure were obtained. The study results showed that the phase composition of the gradient coating strongly depends on the mass fraction of Al. In the case of an aluminium content of 30% in the composition of the composite powder, the formation of aluminium oxide was detected. It is established that under the same detonation deposition modes, the formation of the gradient structure of coatings will strongly depend on the aluminium content in the NiCr-Al composition. The study results showed that the optimal composition of the powder is NiCr – 80% and Al – 20% to obtain NiCr-Al coatings with a gradient structure.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47251810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photocatalytic activity of zinc oxide – graphene oxide composites 氧化锌-氧化石墨烯复合材料的光催化活性

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/102-110

Zh.U. Paltusheva, N. Alpysbaiuly, Y. Kedruk, А.D. Zhaidary, L. Gritsenko, M. Aitzhanov, K. Abdullin

{"title":"Photocatalytic activity of zinc oxide – graphene oxide composites","authors":"Zh.U. Paltusheva, N. Alpysbaiuly, Y. Kedruk, А.D. Zhaidary, L. Gritsenko, M. Aitzhanov, K. Abdullin","doi":"10.31489/2022ph2/102-110","DOIUrl":"https://doi.org/10.31489/2022ph2/102-110","url":null,"abstract":"Recently, the use of various dyes in the cellulose, textile, plastics and rubber industries has resulted in severe toxic and dye contamination of wastewater. These toxic dyes are not biodegradable and have a detrimental effect on the environment, blocking sunlight and reducing photosynthesis. Consequently, there is an urgent need to develop a low-cost effective technology for purifying wastewater from harmful organic pollutants. In this context, photocatalysis is an advanced, environmentally friendly oxidation process for wastewater treatment. Recent studies have shown that the use of semiconductor photocatalytically active materials with a wide band gap is an effective method for the decomposition of organic pollutants in aqueous solutions. In this work, a low-cost technology for the synthesis of composite semiconductor zinc oxide / graphene oxide (ZnO / GO) materials by chemical deposition from an aqueous solution has been developed. The morphology, structural and photoluminescent properties of the synthesized ZnO/GO samples with different graphene oxide concentration have been studied. The research of the photocatalytic activity of synthesized zinc oxide – graphene oxide composite materials is carried out by observing an aqueous solution of rhodamine B dye degradation under ultraviolet illumination.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41567013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The investigation of a physical pendulum motion, which move along a horizontal axis 对沿水平轴运动的物理钟摆运动的研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/75-85

O. Lyashuk, L. Serilko, D. Serilko, І. Hevko, I. Lutsiv, Y. Vovk, M. Levkovich, O. Tson

{"title":"The investigation of a physical pendulum motion, which move along a horizontal axis","authors":"O. Lyashuk, L. Serilko, D. Serilko, І. Hevko, I. Lutsiv, Y. Vovk, M. Levkovich, O. Tson","doi":"10.31489/2022ph1/75-85","DOIUrl":"https://doi.org/10.31489/2022ph1/75-85","url":null,"abstract":"The article presents a study of the physical pendulum, taking into account the force of friction in the kinematic pair, as a result of which oscillations are damped. Graphs of the dependence of the pendulum deflection angle α and the angular velocity on time for different values of the velocity v have been given. It has been established that the speed of the sleeve significantly reduces the amplitude and angular velocity of the pendulum, and the frequency of its oscillations does not depend on the presence of dry friction in the system. The dependences of the change in the amplitude of pendulum oscillations have been given and the results of numerical integration of the differential equation of pendulum motion have been obtained. The graphical dependences of the pendulum deflection angle and the movement of the sleeve x along the horizontal axis from time to time have been obtained at different values of the coefficient of friction. It has been found that during the first five seconds of the system movement, the axial speed of the sleeve is practically independent of the coefficient of friction (at f = 0.3… 0.5). To verify the obtained results, an experimental laboratory installation has been designed and manufactured. Theoretical studies are satisfactorily consistent with experimental data, with an error not exceeding 16%. The obtained dependencies can be used in the design and study of various mechanisms, the motion of which is described by similar differential equations. Such mechanisms include inertial conveyors, the gutter of which performs in addition to longitudinal and transverse oscillations. In addition, the proposed technique can be used in the study of the motion of bulk materials in an inclined cylinder, which performs torsional oscillations around the axis of symmetry.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47820578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of physical control methods for metric parameters of extended products in cable industry 电缆工业扩展产品计量参数物理控制方法研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/7-17

Sh. Yarkimbaev, E. Fedorov, V. V. Redko, O. Galtseva, X. Jiang

{"title":"Study of physical control methods for metric parameters of extended products in cable industry","authors":"Sh. Yarkimbaev, E. Fedorov, V. V. Redko, O. Galtseva, X. Jiang","doi":"10.31489/2022ph2/7-17","DOIUrl":"https://doi.org/10.31489/2022ph2/7-17","url":null,"abstract":"The paper discusses the problems of electrical cables metric (geometric) parameters measurement. The methods of measuring the eccentricity of the electric cables (contact, ultrasonic, X-ray, and inductive-optical) are considered. The advantages and disadvantages of using these methods of technological control of cable products are shown. A study of the inductive-optical conversion method for measuring the eccentricity of a singlecore cable, including the circuit for switching on the windings of the inductive converter, is proposed; the design of this converter is presented. The proposed solution makes it possible to achieve good conversion linearity when the conductor is displaced in the control zone. Wherein there is no need to use a system of mechanical drives for centering the magnetic transducer. In addition, the proposed scheme enables to combine the magnetic and optical transducer constructively in the same plane, which ensures to reduce its longitudinal dimensions relative to known analogues. The device prototype for eccentricity control is created based on the proposed transducer; its technical characteristics are confirmed. Direction of further research is determined as part of the development of the industrial design of the device.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45998384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Longitudinal magnetoresistance of uniaxially deformed n-type silicon 单轴变形n型硅的纵向磁阻

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/111-116

O.D. Bigozha, A. Seitmuratov, L. Taimuratova, B. Kazbekova, Z. Aimaganbetova

{"title":"Longitudinal magnetoresistance of uniaxially deformed n-type silicon","authors":"O.D. Bigozha, A. Seitmuratov, L. Taimuratova, B. Kazbekova, Z. Aimaganbetova","doi":"10.31489/2022ph1/111-116","DOIUrl":"https://doi.org/10.31489/2022ph1/111-116","url":null,"abstract":"The study of Galvano-magnetic effects (as well as tensoeffects) in silicon under extreme conditions allows not only to identify the mechanisms of these effects but also to identify the possibility of creating gaussmeters, infrared detectors, sensitive strain gauges, amplifiers and generators of a wide frequency range. The reliability of the mechanism of negative magnetoresistance was verified using uniaxial elastic deformation of the studied crystals. Uniaxial deformation excludes interline transitions of electrons, as a result of which negative magnetoresistance disappears with an increase in uniaxial pressure. When cubic symmetry is violated, anisotropic phenomena occur in such crystals. The multipath of the isoenergetic surface of the bottom of the silicon conduction band causes anisotropies of the effective mass and relaxation time, which are associated with the features of the transfer phenomenon. In particular, magnetoresistance (piezoresistance), which is the most sensitive to the anisotropy of the iso energy surface. The influence of the latter on magnetoresistance is most clearly revealed in the region of strong magnetic fields, where the magnetoresistance is saturated since the longitudinal magnetoresistance is entirely due to the anisotropy of electron mobility.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47339076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of SnO2 photoelectrode’s thickness on photovoltaic properties of the solar cell FTO:SnO2:PTB7-TH:ITIC/Mo/Ag SnO2光电极厚度对FTO:SnO2:PTB7-TH:ITIC/Mo/Ag太阳能电池光电性能的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/86-91

A. Aimukhanov, T. Seisembekova, A. Zeinidenov, D. S. Kambar

引用次数: 0

Influence of the environment on the morphology, optical and electrical characteristics of the PEDOT:PSS polymer 环境对PEDOT:PSS聚合物形貌、光学和电学特性的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph1/117-126

X. Rozhkova, А.К. Aimukhanov, А.К. Zeinidenov, А.М. Alexeev

{"title":"Influence of the environment on the morphology, optical and electrical characteristics of the PEDOT:PSS polymer","authors":"X. Rozhkova, А.К. Aimukhanov, А.К. Zeinidenov, А.М. Alexeev","doi":"10.31489/2022ph1/117-126","DOIUrl":"https://doi.org/10.31489/2022ph1/117-126","url":null,"abstract":"The paper presents the results of studying the influence of the environment on the surface structure, optical and electrical characteristics of the PEDOT:PSS film. The studies have been carried out in three different types of atmosphere under the same conditions of thermal annealing of the films. It has been established that the modification of the surface of a polymer film with ethanol and isopropanol in vacuum, in a nitrogen atmosphere, and in the air atmosphere leads to a change in the surface morphology and the optical electric transport properties of the polymer. Depending on the environment, when the PEDOT:PSS film is modified with a certain concentration of ethyl and isopropyl alcohols, the absorption spectra show a shift in the absorption maximum responsible for PEDOT to the short-wavelength region of the spectrum, as well as a decrease in the absorption peak of the part of the spectrum responsible for the absorption of the aromatic fragment PSS. It is identified that the structural features of the PEDOT:PSS surface morphology affect the electrical transport parameters of the films: Rh is the resistance of the PEDOT:PSS polymer film, Rext is the charge carrier transfer resistance at the PEDOT:PSS/electrode interface, keff is the effective charge carrier extraction rate and τeff is the effective transit time of charge carriers. The optimal technological parameters for film production have been determined, at which the electrical transport properties of PEDOT:PSS polymer films are increased.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49140017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Physical and Chemical Processes of Structure Formation of (BeO+TiO2)-Ceramics with the Addition of TiO2 Nanoparticles TiO2纳米粒子对（BeO+TiO2）-陶瓷结构形成的物理化学过程

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/92-101

A. Pavlov, Zhuldyz Sagdoldina, N. Magazov, A. Kengesbekov, A. Kassymov

{"title":"Physical and Chemical Processes of Structure Formation of (BeO+TiO2)-Ceramics with the Addition of TiO2 Nanoparticles","authors":"A. Pavlov, Zhuldyz Sagdoldina, N. Magazov, A. Kengesbekov, A. Kassymov","doi":"10.31489/2022ph2/92-101","DOIUrl":"https://doi.org/10.31489/2022ph2/92-101","url":null,"abstract":"This paper describes in detail the solid-phase sintering mechanism of BeO + + ceramics in the 1520–1550 °C temperature range. It is shown that the structural elements are formed due to the processes of pore disappearance and grain growth in the process of ceramic shrinkage during sintering. It is found that under the influence of TiO2 nanoparticles it is possible to increase the sintering temperature of such ceramics by 30 °C, which promotes the transformation of the crystal structure of TiO2 into a more conductive Ti3O5 with an orthorhombic structure. The mechanism of the slowing down of the grain boundary movement by the second phase impurity as the segregation of nano impurities on the grain boundary is described. The calculation of binding energy of spontaneous chemical reactions during sintering of ceramics is performed, chemical elements and compounds related to conductive phase in ceramics of BeO + + composition at sintering temperature 1550 °С are determined. It is shown that the specific conductivity of the synthesized nanocomposite material increases in comparison with the ceramics consisting of micropowders in the frequency range of 100 Hz–100 MHz, at a sintering temperature of 1550 °С.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43644900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of the electron-optical scheme of a new type mirror energy analyzer of charged particles 新型带电粒子反射镜能量分析仪电子光学方案的计算

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/49-57

Zh.T. Kambarova, A. Saulebekov, K. Kopbalina

{"title":"Calculation of the electron-optical scheme of a new type mirror energy analyzer of charged particles","authors":"Zh.T. Kambarova, A. Saulebekov, K. Kopbalina","doi":"10.31489/2022ph2/49-57","DOIUrl":"https://doi.org/10.31489/2022ph2/49-57","url":null,"abstract":"Further studies of the electron-optical properties of electrostatic multipole-cylindrical fields, synthesized from the fields of a cylindrical mirror and circular multipoles, are continued in the work. The implementation of electron spectroscopy methods is based on the use of complex equipment, one of the main elements of which is an electron energy analyzer of low and medium energies. Application of the multipole approach to the synthesis of deflecting fields makes it possible to develop effective methods for energy analysis of charged particle beams. The electron-optical scheme of new type mirror energy analyzer of charged particle beams based on an electrostatic axially symmetric octupole-cylindrical field is proposed in the work. An axially symmetric octupole-cylindrical field is constructed as a superposition of a basic cylindrical field and a circular octupole. When the fields were added, the central circle of the octupole was combined with the zero equipotential of the logarithmic field. The motion of charged particles in the electrostatic octupole-cylindrical field. An integrodifferential equation for the motion of charged particles in an electrostatic octupolecylindrical field is derived. Calculation of trajectories in an energy analyzer with an octupole-cylindrical field was performed on the basis of the method of expansion into a fractional-power series of the particle motion equation presented in the integrodifferential form. Coefficients of the series, representing the trajectory of motion in an analytical form, accessible for further studies of the electron-optical characteristics of the octupole-cylindrical field, are obtained. Based on an octupole-cylindrical field, high luminosity energy analyzers can be built to determine the composition of charged particle beams with energies from units of eV to tens of keV in space plasma.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43118845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cosmography in the multifield cosmological model 多场宇宙学模型中的宇宙学

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-06-30 DOI: 10.31489/2022ph2/37-48

G.S. Altayeva, О.V. Razina, P. Tsyba

{"title":"Cosmography in the multifield cosmological model","authors":"G.S. Altayeva, О.V. Razina, P. Tsyba","doi":"10.31489/2022ph2/37-48","DOIUrl":"https://doi.org/10.31489/2022ph2/37-48","url":null,"abstract":"This paper analyzes a cosmological model containing the fermion field, scalar field and vector field with Yukawa interaction. Such a model allows one to research the contribution of various types of matter to the dynamics of the universe. In flat, homogeneous, and isotropic space-time, this coupling can provide the acceleration expansion of the universe. Cosmological reconstruction of dynamical equations is obtained using hybrid solution. This solution is researched by cosmography and energy condition. In the model under study, a zero energy condition, a strong energy condition, and a dominant energy condition are satisfied, and a weak energy condition, which is not mandatory, is not satisfied. It is shown how the cosmographic parameters – the parameters of deceleration q, jerk j, and snap s – can be related to the hybrid value of the scale factor. The resulting analysis makes it possible to relate the model-independent results obtained from cosmography to theoretically substantiated assumptions of gravity. The total density and pressure of the energy of the gravitational field are found in the form of the sum of contributions, which are associated with the bosonic, fermionic, vector fields, as well as the Yukawa type potential. In the model under study, in the early epoch, the bosonic field is responsible for the accelerated regime. Fermionic and vector fields have a positive pressure value, and therefore slow down the accelerated expansion of the universe. At a later time, a transition to a slow mode occurs, as the total pressure tends to zero.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42581093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0