Pub Date : 2024-03-14DOI: 10.3103/s1061386224010047
R. Y. Kolekar, S. B. Kapatkar, Sushant S. Kakati, S. N. Mathad
Abstract
The Co0.8–xMgxZn0.2Fe2O4 (x = 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 Fd-3m was confirmed. The lattice constant (a), particle size (D), hopping lengths (LA and LB), bond lengths (A–O and B–O), ionic radii (rA and rB), microstrain (ε,) and dislocation density (ρD) 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.
{"title":"Impact of Magnesium on Structural and Morphological Study of Co–Zn Ferrites","authors":"R. Y. Kolekar, S. B. Kapatkar, Sushant S. Kakati, S. N. Mathad","doi":"10.3103/s1061386224010047","DOIUrl":"https://doi.org/10.3103/s1061386224010047","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010102
M. Upasani
Abstract
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 Si4+ doping in YAG:Ce,Nd phosphors were also studied.
{"title":"Synthesis, Characterization, and Optical Properties of Y3Al5O12:Ce,Nd Phosphor by Mixed Fuel Combustion Synthesis","authors":"M. Upasani","doi":"10.3103/s1061386224010102","DOIUrl":"https://doi.org/10.3103/s1061386224010102","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010072
B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov
Abstract
The combustion modes of granular mixtures (100 – X)(Ti + C) + XNiCr, X = 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 X < 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 X = 30%. XRD analysis of the synthesis products revealed no intermetallic phases, regardless of the size of the granules.
摘要 研究了颗粒状混合物 (100 - X)(Ti + C) + XNiCr（X = 0-30%）的燃烧模式。实验装置对燃烧过程中释放的杂质气体进行了过滤，过滤的方向可以是燃烧前沿的传播方向，也可以是通过样品的侧表面。不同气体过滤方案下燃烧速度的比较表明，对流传热对 X < 30% 混合物的燃烧模式有影响。提出了一种方法来确定向对流燃烧模式过渡的混合物成分。对不同成分混合物中杂质气体的含量进行了定量估算。实验数据与基于过滤燃烧理论的计算结果的比较表明，所有 0.6 毫米颗粒的混合物以及 X = 30% 的 1.7 毫米颗粒的混合物都存在传导燃烧模式。对合成产物的 XRD 分析表明，无论颗粒大小如何，都没有金属间相。
{"title":"Combustion Synthesis of Cermets from Granular Mixtures Ti–C–NiCr for Protective Coatings","authors":"B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov","doi":"10.3103/s1061386224010072","DOIUrl":"https://doi.org/10.3103/s1061386224010072","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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> < 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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010023
D. M. Davydov, E. R. Umerov, A. P. Amosov, E. I. Latukhin
Abstract
The phase formation and macro/microstructure of a porous skeleton based on Ti3SiC2 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 Ti3SiC2 MAX phase (66%) and to possess high density and compressive strength (2.41 g/cm3 and 104 MPa, respectively).
摘要 通过在空气中对由不同粒度的钛粉、不同形态的碳粉和硅粉组成的绿色混合物进行自蔓延高温合成，制备了基于 Ti3SiC2 MAX 相的多孔骨架的相形成和宏观/微观结构。结果显示了合成样品的孔隙率、抗压强度和定量相组成的比较数据。结果表明，Ti 和 C 粉的分数组成（粒度）以及 C 的形式（石墨、炭黑）对多孔 SHS 骨架的宏观结构有显著影响。使用粗Ti和中胶体石墨粉获得的多孔骨架具有较高的Ti3SiC2 MAX相含量（66%），并具有较高的密度和抗压强度（分别为2.41 g/cm3和104 MPa）。
{"title":"Influence of Starting Reagents on the Formation of Ti3SiC2 Porous Skeleton by SHS in Air","authors":"D. M. Davydov, E. R. Umerov, A. P. Amosov, E. I. Latukhin","doi":"10.3103/s1061386224010023","DOIUrl":"https://doi.org/10.3103/s1061386224010023","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010060
B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov
Abstract
The combustion patterns of powder mixtures (100 – X)(Ti + C) + XNiCr, X = 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.
{"title":"Patterns of Synthesis of TiC–NiCr Cermets from Powder Mixtures: Influence of Nichrome Content and Titanium Particles Size","authors":"B. S. Seplyarskii, R. A. Kochetkov, T. G. Lisina, N. I. Abzalov","doi":"10.3103/s1061386224010060","DOIUrl":"https://doi.org/10.3103/s1061386224010060","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010059
W. Ramdane
Abstract
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.
{"title":"Self-Propagating High-Temperature Synthesis of Complex Phases: The Example of TiC-Based Composites","authors":"W. Ramdane","doi":"10.3103/s1061386224010059","DOIUrl":"https://doi.org/10.3103/s1061386224010059","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-14DOI: 10.3103/s1061386224010096
A. A. Tokranov, E. O. Tokranova, R. V. Shafigulin, A. V. Bulanova, M. V. Kuznetsov, A. V. Safonov, Yu. G. Morozov
Abstract
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, m-, p-, and o-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.
{"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, E. O. Tokranova, R. V. Shafigulin, A. V. Bulanova, M. V. Kuznetsov, A. V. Safonov, Yu. G. Morozov","doi":"10.3103/s1061386224010096","DOIUrl":"https://doi.org/10.3103/s1061386224010096","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><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":null,"pages":null},"PeriodicalIF":0.6,"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}
Pub Date : 2024-03-01DOI: 10.3103/s1061386224010084
Abstract
Bi- and trimetallic catalysts based on multi-walled carbon nanotubes (MWCNT) and metal (Me) phthalocyanines (Pc) (MePc) (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—limiting diffusion current, potential half-waves, and initial reaction potential—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%.
{"title":"ORR Catalysts Based on Carbon Nanotubes and Metal Phthalocyanines Obtained by High-Temperature Synthesis","authors":"","doi":"10.3103/s1061386224010084","DOIUrl":"https://doi.org/10.3103/s1061386224010084","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Bi- and trimetallic catalysts based on multi-walled carbon nanotubes (MWCNT) and metal (Me) phthalocyanines (Pc) (MePc) <strong>(</strong>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<strong>—</strong>limiting diffusion current, potential half-waves, and initial reaction potential<strong>—</strong>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> </span>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-03-01","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}
Pub Date : 2024-01-18DOI: 10.3103/s1061386223040039
Yu. V. Bogatov, A. V. Shcherbakov, V. A. Shcherbakov
{"title":"Pressure-Assisted Electrothermal Explosion of Titanium Nickelide","authors":"Yu. V. Bogatov, A. V. Shcherbakov, V. A. Shcherbakov","doi":"10.3103/s1061386223040039","DOIUrl":"https://doi.org/10.3103/s1061386223040039","url":null,"abstract":"","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498467","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}
Pub Date : 2024-01-18DOI: 10.3103/s1061386223040040
E. A. Chavarriaga, A. A. Lopera, J. Alarcón
Abstract
In this study, α-Fe2O3 was synthesized by solution combustion method using 6-aminohexanoic acid (AH) as a fuel and with different oxidizer-to-fuel ratios (Φ) of 0.6, 0.8, 1.0, 1.2, and 1.4. The as-prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), and UV–Vis spectroscopy. The results showed that the Φ ratio played a crucial role in determining the crystallinity and purity of the powders of α-Fe2O3. The α-Fe2O3 powder synthesized at an Φ ratio of 0.6 exhibited phase purity of hematite. This study demonstrates the importance of controlling the Φ ratio in the synthesis of α-Fe2O3 which could be used as an inorganic pigment in paints.
{"title":"Controlled Oxidant-to-Fuel Ratios for Synthesis of Inorganic Hematite Pigment (α-Fe2O3) Using Solution Combustion Method with 6-Aminohexanoic Acid as Fuel","authors":"E. A. Chavarriaga, A. A. Lopera, J. Alarcón","doi":"10.3103/s1061386223040040","DOIUrl":"https://doi.org/10.3103/s1061386223040040","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, α-Fe<sub>2</sub>O<sub>3</sub> was synthesized by solution combustion method using 6-aminohexanoic acid (AH) as a fuel and with different oxidizer-to-fuel ratios (Φ) of 0.6, 0.8, 1.0, 1.2, and 1.4. The as-prepared powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), and UV–Vis spectroscopy. The results showed that the Φ ratio played a crucial role in determining the crystallinity and purity of the powders of α-Fe<sub>2</sub>O<sub>3</sub>. The α-Fe<sub>2</sub>O<sub>3</sub> powder synthesized at an Φ ratio of 0.6 exhibited phase purity of hematite. This study demonstrates the importance of controlling the Φ ratio in the synthesis of α-Fe<sub>2</sub>O<sub>3</sub> which could be used as an inorganic pigment in paints.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498719","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}
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