Bulletin of the University of Karaganda-Physics最新文献_第2页

Thermodynamic properties of titanium-manganite LaСаTiMnO6 钛-锰矿石的热力学性质LaСаTiMnO6

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/171-177

B.K. Kasenov, Sh.B. Kasenova, Zh.I. Sagintaeva, C.O. Baisanov, N.Yu. Lu N.Yu. Lu, E.E. Kuanyshbekov, Zh.S. Bekturganov, A.K. Zeinidenov

{"title":"Thermodynamic properties of titanium-manganite LaСаTiMnO6","authors":"B.K. Kasenov, Sh.B. Kasenova, Zh.I. Sagintaeva, C.O. Baisanov, N.Yu. Lu N.Yu. Lu, E.E. Kuanyshbekov, Zh.S. Bekturganov, A.K. Zeinidenov","doi":"10.31489/2023ph3/171-177","DOIUrl":"https://doi.org/10.31489/2023ph3/171-177","url":null,"abstract":"By the method of dynamic calorimetry in the range of 298.15-673 K, the heat capacity of titanium-manganite LaСаTiMnO6, obtained by solid-phase interaction at 800-1200oC from lanthanum, titanium (II), manganese (III) and calcium carbonate oxides was studied. On the dependence curve Ср~(T) in the specified temperature range, a λ-shaped effect was detected at 598 K, probably related to the phase transition of the second kind. A fundamental constant is determined — the standard heat capacity of LaСаTiMnO6, equal to 22114 J /(molK). Its standard entropy, equal to 2066 J/(molK), was estimated by the approximate method of ion increments. Based on experimental data, taking into account the temperature of the phase transition, the equations describing the temperature dependences of Ср~(T) and the thermodynamic functions So (T), Ho (T) — Ho (298.15) and Фхх(Т) of the investigated titanium-manganite lanthanum and calcium are calculated. The standard heat capacity of LaСаTiMnO6 is also calculated using the Debye method, the value of which is in good agreement with experimental data. According to the developed methodology, the standard enthalpy of titanium-manganite formation was calculated, equal to — 3867.5 kJ/mol","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084123","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

Processing of organic waste by electrohydroimpulse method 电-水脉冲法处理有机废物

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/156-162

B.R. Nussupbekov, M.S. Duisenbayeva

{"title":"Processing of organic waste by electrohydroimpulse method","authors":"B.R. Nussupbekov, M.S. Duisenbayeva","doi":"10.31489/2023ph3/156-162","DOIUrl":"https://doi.org/10.31489/2023ph3/156-162","url":null,"abstract":"The article considers the regularities, parameters of technology and installations for electrohydroimpulse extraction of fat from bone mass. To date, the growth of production and increasing its efficiency in industries processing agricultural raw materials largely depends not only on raw materials and their quality, but also on the completeness of extraction of valuable components. Reducing the loss of the extracted product in production, for example, sugar, starch, fat, can significantly increase the yield of finished products when using optimal extraction methods and methods. The result is powerful hydraulic shocks with pressure pulses sufficient to break the bonds, retain fat cells in the tissue and destroy the cells themselves. This article discusses the technology of extracting fat from bones. The priority direction of technical policy in the agroindustrial complex, as well as in the light and food industries, is currently the development of a system of operational and promising measures to provide agricultural producers with high-quality, environmentally friendly, safe and highly reliable equipment. The dominant and extremely unfavorable production conditions force the manufacturer not to process, but to sell raw materials.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084126","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

Characterization of YAG:Ce ceramics with graphene oxide 氧化石墨烯YAG:Ce陶瓷的表征

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/151-155

D. Deulina, V. Paygin, T. Alishin, S. Stepanov, D. Valiev, E. Dvilis, O. Khasanov, A. Ilela

{"title":"Characterization of YAG:Ce ceramics with graphene oxide","authors":"D. Deulina, V. Paygin, T. Alishin, S. Stepanov, D. Valiev, E. Dvilis, O. Khasanov, A. Ilela","doi":"10.31489/2023ph3/151-155","DOIUrl":"https://doi.org/10.31489/2023ph3/151-155","url":null,"abstract":"Yttrium-aluminum garnet (Y3Al5O12) is an optical material that shows great potential due to its favorable light-emitting and mechanical properties, as well as its chemical stability and thermal resistance. It is commonly utilized in laser technology, optical instruments, and solid-state light sources as a result of its activation by transition metal or rare earth element ions. In this work, experiments were carried out on the procedure for compacting samples of luminescent ceramics Y3Al5O12:Ce3+, by single-base pressing followed by sintering. Comprehensive studies of the influence of graphene oxide of variable concentration (x=0.1;0.5; 1 wt.%) on the radiative characteristics of ceramic samples. It was found that the addition of graphene oxide in an amount from 0.1 to 1 wt. % affects the density and luminescent properties of YAG:Ce ceramics. There is a decrease in the value of the density parameter at concentrations of graphene oxide 0.1-1 wt. % before annealing, after annealing, the relative density value increases to ~99 %. The luminescence spectrum when excited by a blue LED chip appears as a wide band in the spectral range 460-750, the nature of which is associated with radiative transitions in the cerium ion. It has been established that the light-emitting characteristics have a downward trend when activated by graphene oxide. The integral luminescence intensity decreases from 27.1 % to 19 % with an increase in the concentration of graphene oxide.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083976","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

Determination of the optimal deflection angle of the sail blade of a wind power plant 风电场风帆叶片最佳偏转角的确定

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/128-135

N.K. Tanasheva, M.A. Burkov, A.N. Dyusembayeva

{"title":"Determination of the optimal deflection angle of the sail blade of a wind power plant","authors":"N.K. Tanasheva, M.A. Burkov, A.N. Dyusembayeva","doi":"10.31489/2023ph3/128-135","DOIUrl":"https://doi.org/10.31489/2023ph3/128-135","url":null,"abstract":"This article presents the results of studies of a sailing wind power plant at various parameters. For this purpose, a model of a wind power plant controlled by a system of sail blades was developed. Studies of aerodynamic forces at different angles of deflection of the sail blade system were carried out: 0°; 30°; 60°; 90°. The air flow velocity varied in the range from 3 to 14 m/s. The experiments were carried out in a T-1-M wind tunnel designed to measure forces and moments acting on a sailing wind turbine. As a result of experiments, it was found that with an increase in the air flow velocity, the frequency of rotation of the shaft of the wind power plant increased. The maximum rotational speed of the shaft was reached at α = 0° deflection of the sail blade system of the wind power plant. A number of experiments were carried out and aerodynamic characteristics were obtained depending on the deflection angle (α) of the sail blade system of the wind power plant and the air flow velocity. As the deflection angle of the blade system increases, the drag force decreases depending on the air flow velocity. It was experimentally established that at α = 30° deflection of the blade system created the maximum lift force. Based on the data obtained, it was found that with an increase in the speed of the incoming air flow, the aerodynamic forces acting on the sailing wind power plant increased.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135083969","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

Unveiling the Potential of MnxCo3–xS4 Electrocatalyst in Triiodide Reduction for Dye-sensitized Solar Cells 揭示MnxCo3-xS4电催化剂在染料敏化太阳能电池中还原三碘化物的潜力

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/58-64

D. Suleimenova, Ye. Tashenov, Mannix P. Balanay, B. Baptayev

{"title":"Unveiling the Potential of MnxCo3–xS4 Electrocatalyst in Triiodide Reduction for Dye-sensitized Solar Cells","authors":"D. Suleimenova, Ye. Tashenov, Mannix P. Balanay, B. Baptayev","doi":"10.31489/2023ph3/58-64","DOIUrl":"https://doi.org/10.31489/2023ph3/58-64","url":null,"abstract":"The development of a low-cost and high-efficiency Pt-free counter electrode is an important goal to improve the performance of dye-sensitized solar cells. In this study, we successfully synthesized a MnxCo3-xS4-based counter electrode by a facile solvothermal synthesis technique. The electrocatalyst was directly deposited on a fluorine doped titanium oxide (FTO) coated glass substrate. Various characterization techniques such as Xray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy were employed to analyze the obtained MnxCo3-xS4 counter electrode material. The photovoltaic measurements performed on the dye-sensitized solar cells showed a remarkable improvement in energy conversion efficiency with the MnxCo3-xS4counter electrode (8.60 %) compared to the conventional Pt (8.11 %). Moreover, the MnxCo3-xS4counter electrode exhibited excellent stability, further highlighting its potential as an efficient and durable alternative to Pt in dye-sensitized solar cells. Overall, our results contribute to the further development of Pt-free counter electrode materials for sustainable solar energy applications.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084114","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

Flow Behavior of Complex-Shaped Particle Mixtures in Rotary Drums: A DEM Study 复杂形状颗粒混合物在旋转鼓中的流动特性:DEM研究

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/75-85

Z. Berkinova, B. Golman

引用次数: 0

Effects of Sm doping on EuB6 Sm掺杂对EuB6的影响

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/86-90

C. Bozada

引用次数: 0

Structural and optical properties of carbon nanodots based on citric acid doped with nitrogen atoms 柠檬酸掺杂氮原子碳纳米点的结构与光学性质

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/91-97

G. Amanzholova, E. Seliverstova, N. Ibrayev, E.I. Terukov

{"title":"Structural and optical properties of carbon nanodots based on citric acid doped with nitrogen atoms","authors":"G. Amanzholova, E. Seliverstova, N. Ibrayev, E.I. Terukov","doi":"10.31489/2023ph3/91-97","DOIUrl":"https://doi.org/10.31489/2023ph3/91-97","url":null,"abstract":"A study of the luminescent properties of carbon nanodots obtained by microwave and hydrothermal methods of synthesis from citric acid and urea was performed. The resulting nanoparticles were characterized using transmission electron microscopy, dynamic light scattering, and Fourier transform infrared spectroscopy. The sizes of the obtained carbon nanodots after dialysis was varied from 2 to 8 nm. FTIR spectra confirm the presence of oxygen-containing –OH, –CN and –NH groups in the resulting solutions. For all studied carbon nanodots, the maximum fluorescence intensity is observed upon excitation at a wavelength of 350 nm. The fluorescence spectrum does not change its position on the wavelength scale for the samples under study due to changes in the molar ratio of precursors and the method of synthesis. The highest fluorescence quantum yield was obtained for carbon nanodots with a ratio of citric acid and urea 1:4 obtained by the microwave synthesis method. The fluorescence lifetime of carbon nanodots doped with nitrogen atoms is ~7.4 ns. It is shown that a change in the ratio of precursors does not significantly affect the size and morphology of carbon nanodots.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084113","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 the VAC of the EPCTT process with varying electrode parameters 不同电极参数下EPCTT工艺VAC的研究

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/136-142

B.K. Rakhadilov, N.E. Berdimuratov, L.G. Zhurerova, L.B. Bayatanova, Z.A. Satbayeva, Sh.R. Kurbanbekov

{"title":"Study of the VAC of the EPCTT process with varying electrode parameters","authors":"B.K. Rakhadilov, N.E. Berdimuratov, L.G. Zhurerova, L.B. Bayatanova, Z.A. Satbayeva, Sh.R. Kurbanbekov","doi":"10.31489/2023ph3/136-142","DOIUrl":"https://doi.org/10.31489/2023ph3/136-142","url":null,"abstract":"Nowadays the treatment of machine parts, instruments is one of the actual topics in the modern world. One of the modern processing method is chemical-thermal treatment of parts, in which there is an increase of hardness in the surface part to increase wear resistance, while the core of the part remains in a ductile state for resistance to shock loading. The solution to this problem could be the electrolytic plasma chemical-thermal treatment of the parts. This method has a number of advantages over traditional methods, such as costeffectiveness and speed of processing. In the present work the influence of changes in technological parameters on the volt-ampere characteristics of electrolyte-plasma chemical-thermal treatment unit is presented. A solution of soda ash (Na₂CO₃), urea (CH₄N₂O) in distilled water was used as an electrolyte. According to the results of the study current-voltage diagrams were plotted by varying the diameter of the anode (D=90; 110;130 mm) and the distance between the electrodes (L=50;70; 90 mm). According to the analysis, in the voltage range of 180-220 V, with anode diameter D=110 mm and electrode spacing D=70 mm, a more stable vapor-gas envelope is formed. It was found that by changing the anode diameter, respectively the ratio of active and passive electrodes we can significantly influence the formation of stable vapor gas shell and establishment of the optimum mode of treatment of parts.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084117","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

Effect of plasma-electrolytic oxidation on mechanical properties of titanium coatings 等离子体电解氧化对钛涂层力学性能的影响

Bulletin of the University of Karaganda-Physics Pub Date : 2023-09-30 DOI: 10.31489/2023ph3/65-74

L.B. Bayatanova, A.Zh. Zhassulankyzy, N.M. Magazov, B.K. Rakhadilov, N. Muktanova, G.K. Uazyrkhanova

{"title":"Effect of plasma-electrolytic oxidation on mechanical properties of titanium coatings","authors":"L.B. Bayatanova, A.Zh. Zhassulankyzy, N.M. Magazov, B.K. Rakhadilov, N. Muktanova, G.K. Uazyrkhanova","doi":"10.31489/2023ph3/65-74","DOIUrl":"https://doi.org/10.31489/2023ph3/65-74","url":null,"abstract":"The process of plasma electrolytic oxidation (PEO) allows to obtain multifunctional coatings with unique properties, including wear-resistant, corrosion-resistant, heat-resistant, electrical insulating and decorative. Therefore, the field of application of these coatings is quite wide: medicine, aircraft construction, shipbuilding, instrumentation, automotive and other industries. The technology is based on the phenomenon of micro-arc discharges promoting the formation of oxide layers on metal surfaces. In this review the technologies of obtaining coatings by plasma electrolytic oxidation on titanium are considered. The experiment on PEO of VT1-0 titanium substrate under anodic treatment with the addition of TiO2 nanoparticles to the electrolyte was carried out. Dense, uniform oxide coatings that do not require additional surface grinding were obtained. The coating thickness values were 18.5-62.4 μm. The influence of PEO on the microhardness of calcium-phosphate coatings formed as a result of this treatment was studied. With a satisfactory thickness of the formed layer (62.4 μm), the surface microhardness value (4.04 GPa) was found to be the highest among all the treatment modes compared, simultaneously with a high elastic modulus value (348 GPa) and a small value of the indenter penetration depth on the coating (968.99 nm). These coatings were formed in an electrolyte containing calcium phosphate with the addition of 0.75g of titanium oxide nanoparticles. The increase of microhardness in comparison with the sample without coating is in 2,5 times. As a result of the carried out researches optimum modes and parameters of calcium-phosphate coatings receiving have been established and defined. It is shown that by changing the composition of the electrolyte of the micro-arc treatment process it is possible to influence significantly the structure, thickness and surface properties of the obtained coatings.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135084282","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