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International Journal of Self-Propagating High-Temperature Synthesis最新文献

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Solution Combustion Synthesis and Kinetic Measurements in Ni(NO3)2–C6H8O7 System. Preparation of Nickel Powder Ni(NO3)2-C6H8O7 体系中的溶液燃烧合成和动力学测量。制备镍粉
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-07-01 DOI: 10.3103/S1061386224700031
N. Amirkhanyan
{"title":"Solution Combustion Synthesis and Kinetic Measurements in Ni(NO3)2–C6H8O7 System. Preparation of Nickel Powder","authors":"N. Amirkhanyan","doi":"10.3103/S1061386224700031","DOIUrl":"10.3103/S1061386224700031","url":null,"abstract":"<p>Solution combustion synthesis (SCS) is a widely used method to prepare nanomaterials tailored for specific applications, with a primary focus on understanding the influence of precursors on material properties and microstructure evolution. There is also a lack of systematic studies to understand the kinetics of SCS reactions. This work reports on the preparation of pure nickel by the combustion of Ni(NO<sub>3</sub>)<sub>2</sub> + citric acid (C<sub>6</sub>H<sub>8</sub>O<sub>7</sub>) solution and the investigation of SCS reaction mechanism by thermal analysis technique. The lower and upper combustion limits were determined depending on the citric acid to Ni(NO<sub>3</sub>)<sub>2</sub> ratio. The optimal composition of the initial mixture was revealed to prepare nickel powder without using an additional post–synthesis reduction of metal oxides. Ozawa’s method was employed to calculate the effective activation energy (∼101 ± 5 kJ mol<sup>–1</sup>) of the nickel formation reaction based on the TGA data. The magnetization of the nickel powder agglomerates with ∼80–200-nm nanoscale particles was measured to be 55.1 Am<sup>2</sup> kg<sup>–1</sup>.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 2","pages":"100 - 108"},"PeriodicalIF":0.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531321","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
Rapidly Synthesizing Cu2Sb Phase of Tetragonal Structure by Electrothermal Explosion 通过电热爆炸快速合成四方结构的 Cu2Sb 相
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010035
A. Hafs, T. Hafs, D. Berdjane, L. Yandjah
{"title":"Rapidly Synthesizing Cu2Sb Phase of Tetragonal Structure by Electrothermal Explosion","authors":"A. Hafs,&nbsp;T. Hafs,&nbsp;D. Berdjane,&nbsp;L. Yandjah","doi":"10.3103/S1061386224010035","DOIUrl":"10.3103/S1061386224010035","url":null,"abstract":"<p>In our study, we aimed to synthesize the Cu<sub>2</sub>Sb phase with a tetragonal structure. We achieved this by subjecting compacts (2Cu + Sb) to electrothermal explosion (ETE) with a high current density of 500 Å. To analyze the constituent phases of the alloy composite, we employed X-ray diffraction analysis with the MAUD program, which utilizes the Rietveld method, as well as scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) techniques. Furthermore, we investigated the mechanical properties through Vickers indentation and compression techniques.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"67 - 74"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149492","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
Impact of Magnesium on Structural and Morphological Study of Co–Zn Ferrites 镁对共锌铁氧体结构和形态研究的影响
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010047
R. Y. Kolekar, S. B. Kapatkar, Sushant S. Kakati, S. N. Mathad
{"title":"Impact of Magnesium on Structural and Morphological Study of Co–Zn Ferrites","authors":"R. Y. Kolekar,&nbsp;S. B. Kapatkar,&nbsp;Sushant S. Kakati,&nbsp;S. N. Mathad","doi":"10.3103/S1061386224010047","DOIUrl":"10.3103/S1061386224010047","url":null,"abstract":"<p>The Co<sub>0.8–<i>x</i></sub>Mg<sub><i>x</i></sub>Zn<sub>0.2</sub>Fe<sub>2</sub>O<sub>4</sub> (<i>x</i> = 0.00 to 0.56) ferrites were prepared by solid state reaction route. The phase composition and morphology of the synthesized ferrites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. From the XRD results, single phase cubic spinal structure with space group <i>Fd</i>-3<i>m</i> was confirmed. The lattice constant (<i>a</i>), particle size (<i>D</i>), hopping lengths (<i>L</i><sub>A</sub> and <i>L</i><sub>B</sub>), bond lengths (A–O and B–O), ionic radii (<i>r</i><sub>A</sub> and <i>r</i><sub>B</sub>), microstrain (ε,) and dislocation density (ρ<sub>D</sub>) were reported. The lattice constant increased as magnesium additive increased. The SEM image affirmed size and shape of particles. Crystallite size and microstrain were realized by W–H plot and SSP.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"58 - 66"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149914","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
Synthesis, Characterization, and Optical Properties of Y3Al5O12:Ce,Nd Phosphor by Mixed Fuel Combustion Synthesis 混合燃料燃烧合成 Y3Al5O12:Ce,Nd 磷化物的合成、表征和光学特性
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010102
M. Upasani
{"title":"Synthesis, Characterization, and Optical Properties of Y3Al5O12:Ce,Nd Phosphor by Mixed Fuel Combustion Synthesis","authors":"M. Upasani","doi":"10.3103/S1061386224010102","DOIUrl":"10.3103/S1061386224010102","url":null,"abstract":"<p>The study focuses on the synthesis and energy transfer mechanism between the cerium and neodymium co-doped YAG phosphors. YAG:Ce,Nd powders were synthesized using a mixed fuel combustion method. The effect of the synthesis procedure on the crystallinity and luminescence spectra were examined. The influence of Si<sup>4+</sup> doping in YAG:Ce,Nd phosphors were also studied.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"33 - 38"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149289","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
Combustion Synthesis of Cermets from Granular Mixtures Ti–C–NiCr for Protective Coatings 从用于保护涂层的 Ti-C-NiCr 粒状混合物燃烧合成金属陶瓷
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010072
B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov
{"title":"Combustion Synthesis of Cermets from Granular Mixtures Ti–C–NiCr for Protective Coatings","authors":"B. S. Seplyarskii,&nbsp;R. A. Kochetkov,&nbsp;T. G. Lisina,&nbsp;N. I. Abzalov","doi":"10.3103/S1061386224010072","DOIUrl":"10.3103/S1061386224010072","url":null,"abstract":"<p>The combustion modes of granular mixtures (100 – <i>X</i>)(Ti + C) + <i>X</i>NiCr, <i>X</i> = 0–30%, were studied. The experimental setup provided filtration of impurity gases released during combustion, either in the direction of propagation of the combustion front, or through the side surface of the sample. The comparison of burning velocities in different gas filtration schemes indicates the influence of convective heat transfer on the combustion patterns of mixtures with <i>X</i> &lt; 30%. A method was proposed for determining the composition of the mixture in which the transition to the convective combustion mode occurs. The content of impurity gases in mixtures of different compositions was estimated quantitively. The comparison of experimental data with calculations based on the theory of filtration combustion showed that there is a conductive combustion mode for all mixtures of 0.6-mm granules and a mixture of 1.7-mm granules with <i>X</i> = 30%. XRD analysis of the synthesis products revealed no intermetallic phases, regardless of the size of the granules.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"80 - 86"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149666","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
Influence of Starting Reagents on the Formation of Ti3SiC2 Porous Skeleton by SHS in Air 起始试剂对在空气中通过 SHS 形成 Ti3SiC2 多孔骨架的影响
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010023
D. M. Davydov, E. R. Umerov, A. P. Amosov, E. I. Latukhin
{"title":"Influence of Starting Reagents on the Formation of Ti3SiC2 Porous Skeleton by SHS in Air","authors":"D. M. Davydov,&nbsp;E. R. Umerov,&nbsp;A. P. Amosov,&nbsp;E. I. Latukhin","doi":"10.3103/S1061386224010023","DOIUrl":"10.3103/S1061386224010023","url":null,"abstract":"<p>The phase formation and macro/microstructure of a porous skeleton based on Ti<sub>3</sub>SiC<sub>2</sub> MAX phase prepared by self-propagating high-temperature synthesis of green mixtures consisting of Ti powders differing in particle size, different carbon powder forms, and Si powder in a sand backfill in air. Comparative data on porosity, compressive strength, and quantitative phase composition of synthesized samples were presented. It was established that the fractional composition (particle size) of Ti and C powders, as well as the form of C (graphite, carbon black) influence markedly the macrostructure of porous SHS skeletons. The porous skeleton obtained using coarse Ti and medium colloidal graphite powders was found to have high content of Ti<sub>3</sub>SiC<sub>2</sub> MAX phase (66%) and to possess high density and compressive strength (2.41 g/cm<sup>3</sup> and 104 MPa, respectively).</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"26 - 32"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149298","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
ORR Catalysts Based on Carbon Nanotubes and Metal Phthalocyanines Obtained by High-Temperature Synthesis 通过高温合成获得的基于碳纳米管和金属酞菁的 ORR 催化剂
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010084
R. V. Shafigulin, K. Yu. Vinogradov, A. V. Bulanova, M. V. Kuznetsov, Yu. G. Morozov, A. V. Safonov, V. V. Podlipnov
{"title":"ORR Catalysts Based on Carbon Nanotubes and Metal Phthalocyanines Obtained by High-Temperature Synthesis","authors":"R. V. Shafigulin,&nbsp;K. Yu. Vinogradov,&nbsp;A. V. Bulanova,&nbsp;M. V. Kuznetsov,&nbsp;Yu. G. Morozov,&nbsp;A. V. Safonov,&nbsp;V. V. Podlipnov","doi":"10.3103/S1061386224010084","DOIUrl":"10.3103/S1061386224010084","url":null,"abstract":"<p>Bi- and trimetallic catalysts based on multi-walled carbon nanotubes (MWCNT) and metal (Me) phthalocyanines (Pc) (MePc) <b>(</b>MWCNT–CoPc–NiPc, MWCNT–CuPc–NiPc, MWCNT–CoPc–CuPc, and MWCNT–CoPc–CuPc–Pd) for electrochemical oxygen reduction reaction (ORR) were synthesized by high-temperature synthesis at 1000°C in an inert atmosphere. The obtained materials were characterized by scanning electron microscopy (SEM), low-temperature nitrogen absorption–desorption, and Raman spectroscopy. The change in textural characteristics and morphology of electrocatalysts during high-temperature synthesis was studied. It was shown that the nature of the metal significantly changes the physicochemical characteristics of electrocatalysts based on carbon nanotubes. The electrochemical experiment was carried out in the linear voltammetry algorithm using a three-electrode chamber with a rotating disk electrode. The main characteristics of the process of electroreduction of oxygen from an alkaline electrolyte<b>—</b>limiting diffusion current, potential half-waves, and initial reaction potential<b>—</b>were determined. MWCNT–CoPc–CuPc–Pd catalyst was found to exhibit the highest activity in the reaction of electrochemical oxygen reduction in an alkaline liquid, reaching high efficiency and corrosiveness as with platinum catalysts, with a decrease in activity after 1000 cycles of less than 7%.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"39 - 48"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149480","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
Patterns of Synthesis of TiC–NiCr Cermets from Powder Mixtures: Influence of Nichrome Content and Titanium Particles Size 从粉末混合物合成 TiC-NiCr 金属陶瓷的模式：镍铬含量和钛颗粒尺寸的影响
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010060
B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov
{"title":"Patterns of Synthesis of TiC–NiCr Cermets from Powder Mixtures: Influence of Nichrome Content and Titanium Particles Size","authors":"B. S. Seplyarskii,&nbsp;R. A. Kochetkov,&nbsp;T. G. Lisina,&nbsp;N. I. Abzalov","doi":"10.3103/S1061386224010060","DOIUrl":"10.3103/S1061386224010060","url":null,"abstract":"<p>The combustion patterns of powder mixtures (100 – <i>X</i>)(Ti + C) + <i>X</i>NiCr, <i>X</i> = 0–20%, and phase composition of synthesis products were studied. The different nature of the dependence of the burning velocity on the nichrome content for blends containing titanium powders with particles of characteristic sizes of 60 and 120 μm was explained within the framework of the convective–conductive model by the retarding influence of impurity gases released ahead of the combustion front. The conditions for warming up Ti particles before the front were not met for mixtures of fine and coarse titanium powders. XRD spectra of combustion products showed the necessity of using fine titanium powder to obtain cermets without side phases of intermetallic compounds.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"75 - 79"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149493","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
Self-Propagating High-Temperature Synthesis of Complex Phases: The Example of TiC-Based Composites 复杂相态的自蔓延高温合成：以 TiC 基复合材料为例
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010059
W. Ramdane
{"title":"Self-Propagating High-Temperature Synthesis of Complex Phases: The Example of TiC-Based Composites","authors":"W. Ramdane","doi":"10.3103/S1061386224010059","DOIUrl":"10.3103/S1061386224010059","url":null,"abstract":"<p>TiC-based composites with various initial compositions can be successfully synthesized by self-propagating high-temperature synthesis (SHS) from either mixtures containing thermite reactions or from pure elements. The effect of various experimental parameters on the combustion reaction kinetics and the relationship between structure, microstructure and mechanical behavior of products was identified. It was found that the matrix’s strengthening is one of the most important variables in boosting the composite’s strength, and adding alloy elements reduces the rate and size of cracks and pores in the cermet microstructure. The presence of TiC particles inhibits dislocation motion and has a significant effect on the composite’s mechanical behavior.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"1 - 25"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149495","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
Catalyst Based on Mesoporous Silica Gel Doped with Terbium and Modified with Nickel Obtained by High-Temperature Template Method for Aromatic Hydrocarbons Hydrogenation 用高温模板法制备的掺杂铽和改性镍的介孔硅胶催化剂用于芳香烃加氢反应
IF 0.5
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-03-14 DOI: 10.3103/S1061386224010096
A. A. Tokranov, E. O. Tokranova, R. V. Shafigulin, A. V. Bulanova, M. V. Kuznetsov, A. V. Safonov, Yu. G. Morozov
{"title":"Catalyst Based on Mesoporous Silica Gel Doped with Terbium and Modified with Nickel Obtained by High-Temperature Template Method for Aromatic Hydrocarbons Hydrogenation","authors":"A. A. Tokranov,&nbsp;E. O. Tokranova,&nbsp;R. V. Shafigulin,&nbsp;A. V. Bulanova,&nbsp;M. V. Kuznetsov,&nbsp;A. V. Safonov,&nbsp;Yu. G. Morozov","doi":"10.3103/S1061386224010096","DOIUrl":"10.3103/S1061386224010096","url":null,"abstract":"<p>The catalytic properties of materials based on terbium-doped and nickel-modified mesoporous silica gels prepared by the high-temperature template method were studied. The surface morphology and textural characteristics of the obtained samples were studied by scanning electron microscopy, X-ray phase analysis, and inductively coupled plasma mass spectrometry. The catalytic activity of the obtained catalysts was studied in the hydrogenation reaction of benzene, <i>m-</i>, <i>p-</i>, and <i>o-</i>xylene in the temperature range of 80–170°C and at a hydrogen pressure of 3 atm. It was established that doping with terbium leads to an increase in the catalytic activity of the catalyst modified with nickel in the hydrogenation reaction of benzene derivatives. Therefore, it was shown that mesoporous silica gel doped with terbium and modified with nickel is an effective catalyst for the hydrogenation of benzene and xylenes.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"33 1","pages":"49 - 57"},"PeriodicalIF":0.5,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140149491","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
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