Diamond and Related Materials最新文献

{"title":"Pyrolytic carbon decorated cobalt ferrite nanostructures as a negative electrode material for improved supercapacitor applications","authors":"K. Prabakaran ,&nbsp;T. Kavinkumar ,&nbsp;Muhammed Shafi ,&nbsp;L.R. Shobin ,&nbsp;R.V. Mangalaraja ,&nbsp;Vijayabhaskara Rao Bhaviripudi ,&nbsp;Carolina Venegas Abarzúa ,&nbsp;Arun Thirumurugan","doi":"10.1016/j.diamond.2024.111822","DOIUrl":"10.1016/j.diamond.2024.111822","url":null,"abstract":"<div><div>Cobalt ferrite (CoFe₂O₄) magnetic nanoparticles (MNPs) are prepared by chemical oxidation method with optimized experimental parameters and carbon modified by simple pyrolysis process with the help of sucrose sugar solutions. The phase and morphology analysis from XRD, FESEM and TEM revealing that the post annealing for the carbon formation is not affecting crystalline phase. The attachment of carbon on CoFe₂O₄ MNPs for the nanocomposite formation is confirmed from the FESEM and TEM micrographs. The saturation magnetization of bare CoFe₂O₄ MNPs is observed as 77 and it decreases to 65 emu/g for the carbon composite. The highest specific capacitance of 318 F/g is achieved for the nanocomposites formed at 400 °C. The electrochemical and magnetic characteristics of the carbon nanocomposites reveals that it could be used as a better candidate in the area of negative electrode materials for the magnetic field assisted electrochemical supercapacitor applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111822"},"PeriodicalIF":4.3,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the Y centers in cubic plastically deformed type Ib diamonds (Yakutia placers)","authors":"V.A. Nadolinny ,&nbsp;Yu.N. Palyanov ,&nbsp;M.I. Rakhmanova ,&nbsp;Yu.M. Borzdov ,&nbsp;A.Yu. Komarovskikh ,&nbsp;V.S. Shatsky ,&nbsp;A.L. Ragozin ,&nbsp;O.P. Yurjeva","doi":"10.1016/j.diamond.2024.111821","DOIUrl":"10.1016/j.diamond.2024.111821","url":null,"abstract":"<div><div>For a series of cubic type Ib diamond crystals from Yakutia placers, the interaction of Y centers with radiation defects has been studied and the effect of annealing at high-pressure high-temperature (HPHT) conditions on the infrared (IR) spectra of Y centers has been investigated. It is shown that as a result of electron irradiation and heat treatment at 1000 °C, the intensity of the IR band in the region of 1140–1150 cm⁻¹ (Y center) decreases and the H3 photoluminescence (PL) system (defect representing two nitrogen atoms around vacancy) arises, while the intensity of the IR band at 1282 cm⁻¹ (A center) remains almost unchanged. It is proposed that the H3 defect can be produced by the interaction of vacancy with the Y center. The suitable model for the Y center is a neutral N1 defect (nitrogen pair separated by one carbon atom), which is the limiting stage in the aggregation sequence of impurity nitrogen into the A form. For a neutral N1 structure, a higher energy barrier has to be overcome due to the Coulomb repulsion compared to the diffusion of nitrogen in the bulk crystal volume. The low content of A centers and the presence of nitrogen in the form of neutral N1 defects provide evidence of a sufficiently low growth temperature of the studied diamonds. The crystals have been annealed at HPHT conditions, and prior to the C centers, the Y centers transform into A defects. These results support the proposed model of the Y center as having two nitrogen atoms in proximity to each other (NCN). The IR band at 1332 cm⁻¹ (N⁺ defect) does not anneal out even at a temperature of 2000 °C which indicates the presence of electron acceptors that remain stable at these treatment temperatures. The corresponding acceptor centers can be carbon broken bonds in the dislocation cores. The unusual properties of the N⁺ states and the birefringence patterns in the studied diamonds evidence the plastic deformation of the crystals under study.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111821"},"PeriodicalIF":4.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterization and anti-corrosion property of graphitic carbon nitride for carbon steel in acid medium","authors":"Mohammed T. Abdullahi ,&nbsp;Saviour A. Umoren ,&nbsp;Hatim D.M. Dafalla ,&nbsp;Muhammad N. Tahir","doi":"10.1016/j.diamond.2024.111819","DOIUrl":"10.1016/j.diamond.2024.111819","url":null,"abstract":"<div><div>The present study involved the synthesis of a 2D material known as graphitic carbon nitride (g-C₃N₄) using solvothermal method and characterized using Fourier transform infrared (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). Gravimetric and electrochemical methods, including electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), electrochemical frequency modulation (EFM), and potentiodynamic polarization (PDP), in combination with surface analysis techniques such as SEM, EDS, optical profilometry (OP), and atomic force microscopy (AFM) are used to confirm its anti-corrosive properties. The findings revealed that the effectiveness of g-C₃N₄ increased proportionally with higher concentrations, reaching its peak potency of 85.0 % at a concentration of 100 ppm. Remarkably, the effectiveness of inhibition increased as the temperature rose until it reached 40 °C, but then decreased as the temperature continued to increase up to 60 °C. Density function theory and molecular dynamic simulation were used to correlate the experimental data to explain the intrinsic properties of g-C₃N₄ and the adsorption mechanism. The primary mechanism of corrosion inhibition was found to be the adsorption of g-C₃N₄ onto the steel surface. This was confirmed through surface analysis using SEM, EDS, AFM, OP and computational study.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111819"},"PeriodicalIF":4.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diamond film thermistors for dental vitality assessment","authors":"M.A. Neto ,&nbsp;F. Caramelo ,&nbsp;B.L. Tavares ,&nbsp;A.J.S. Fernandes ,&nbsp;A.V. Girão ,&nbsp;R.F. Silva ,&nbsp;F.J. Oliveira","doi":"10.1016/j.diamond.2024.111812","DOIUrl":"10.1016/j.diamond.2024.111812","url":null,"abstract":"<div><div>In this study, we have demonstrated, for the first time, the use of diamond film thermistors for dental vitality assessment. Thermally sensitive boron-doped diamond films were grown by hot-filament CVD on Si₃N₄ ceramic substrates, and their thermal sensitivity (β) in the 30–50 °C range was optimized using the Taguchi methodology. This analysis facilitated a comprehensive investigation into the effects of argon flow, gas pressure, CH₄/H₂ ratio, and the distance between the sample and heated filaments on the films' microstructure, growth-rate (GR), crystalline quality, and β. Additionally, we introduced an empirical parameter (Y), defined as the ratio of β to electrical resistance.</div><div>Using optimized CVD parameters, we fabricated a fully functional diamond thermistor with a thermal sensitivity of 1435 K, which was then used in dental vitality assessment tests. These tests were conducted on a specialized stand featuring two closed water circuits, allowing the tooth to be cooled to temperatures as low as 10 °C and heated up to 40 °C. The heating response times of our diamond thermistor (DT) and a standard, metal-oxide-based commercial thermistor (CT) were comparable, but the diamond sensor exhibited a broader temperature detection range. Specifically, the DT was able to detect tooth temperatures within the range of 18 °C to 35 °C, whereas the CT was limited to a narrower range of 22 °C to 32 °C. Additionally, the cooling response time for the DT was significantly shorter (190 s) compared to the 260 s required for the CT. These findings highlight the potential of planar diamond thermistors for applications in endodontic medicine, enabling more accurate assessments of dental vitality.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111812"},"PeriodicalIF":4.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and physicochemical characterization of highly efficient ZrO2/g-C3N4 composite catalysts for visible-light-driven removal of tetracycline antibiotics","authors":"Moutaz Aldrdery ,&nbsp;Faisal Alresheedi ,&nbsp;Mohamed R. El-Aassar ,&nbsp;Adeel Ahmed ,&nbsp;Muhammad Aadil ,&nbsp;Amira Alazmi ,&nbsp;Atef El Jery ,&nbsp;Mazen R. Alrahili ,&nbsp;Ayesha Amjad","doi":"10.1016/j.diamond.2024.111801","DOIUrl":"10.1016/j.diamond.2024.111801","url":null,"abstract":"<div><div>The increasing usage of antibiotics ultimately gave rise to potentially harmful effects for both the aquatic ecosystem and human well-being. The use of visible-light-driven photocatalysts is regarded as a very efficient approach for eliminating antibiotics present in wastewater. The primary objective of this work was the fabrication of zirconium dioxide modified with graphitic carbon nitride (ZrO₂/g-C₃N₄) composites to remove tetracycline (TC) antibiotics. The composites were analyzed using various characterization techniques, including XRD, FTIR, XPS, SEM, DLS, and BET analysis. The ZrO₂/g-C₃N₄ achieved a high removal efficiency of 93.18 % for TC in only 56 min under optimal reaction conditions (pH = 6, catalyst dose = 0.32 g/L, and TC concentration = 30 ppm), much higher than that of pristine ZrO₂ (67.73 %) and g-C₃N₄ (29.57 %). The enhanced catalytic efficacy of ZrO₂/g-C₃N₄ composites may be attributable to the great surficial area of ZrO₂/g-C₃N₄ (121.64 m²/g), in contrast to ZrO₂ (97.44 m²/g). The effects of pH, catalyst dose, and initiating concentration on the degrading efficiency of TC were thoroughly investigated. Radical quenching experiments and ESR analysis demonstrated that the major radicals responsible for the breakdown of TC were the hydroxyl (^•OH) and superoxide (O₂^•−) radicals, accompanied by the minor roles of electrons (e⁻) and holes (h⁺). This study presents a straightforward and economical approach for producing ZrO₂/g-C₃N₄ catalysts, which have excessive potential for practical applications in wastewater treatment and reclamation of the environment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111801"},"PeriodicalIF":4.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultra-fast photocatalytic degradation phenomena of methylene blue dye by CoFe2O4 decorated with rGO nanocomposites under visible light irradiation","authors":"M. Tamilchezhiyan ,&nbsp;A. Nishara Begum ,&nbsp;M. Parthibavarman ,&nbsp;S. Aravindan","doi":"10.1016/j.diamond.2024.111817","DOIUrl":"10.1016/j.diamond.2024.111817","url":null,"abstract":"<div><div>Pollutant water discharged from industries makes serious threat to living beings like humans and animals. Hence, the quick action for cost-effective, eco-friendly, portable, thermally-chemically stable materials meets the high demand for clean water. In the present work, pristine CoFe₂O₄ and series of CoFe₂O₄/rGO (0 to 20 wt%) composite photocatalysts were synthesized by hydrothermal method. The structural, morphological, optical a, porosity and elemental composition of the samples were analyzed by XRD, SEM, TEM, FTIR, UV, PL, BET and XPS analysis. XRD and TEM results suggest that CoFe₂O₄ has cubic stricture and spherical shaped morphology with sizes in the range of 20–30 nm, which is uniformly decorated on the rGO sheets surface. The band gap energy values for the rGO, CoFe₂O₄, and rGO-CoFe₂O₄ nanocomposite were determined to be 2.4 eV, 2.21 eV, and 2.02 eV, respectively. The 20 wt% rGO decorated CoFe2O4 showed high surface area (122 m²/g) and porous nature (12 nm) than compared with pristine CoFe2O4 (88 m²/g and 19 nm). Photoluminescence (PL) results evident the low recombination rate of electron- hole pairs in the nanocomposite samples having 20 wt% of rGO (RC20). The observed gain high efficiency as 96.43 % of cationic dye methylene blue (MB). Whereas the kinetics study revealed that pseudo first-order reaction kinetics to rate constants (K = 0.1675 min⁻¹ and R² is 0.96521). The reusability test of the catalyst reveals 92.06 % degradation after 7 consecutive cycles. Moreover, this review specifically discusses the effects of catalyst's dose, pH, and reaction time on MB removal. Changes are observed on before and after treatment are analyzed by using XRD and FTIR for their physico-chemical properties. Antimicrobial study is evaluated for <em>E. coli and S. aureus</em> bacteria. In this pathway of purifying polluted water removal mechanisms are also elaborated. Therefore, it is found that the incorporated rGO helps to improve the characteristic functionalities of CoFe₂O₄.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111817"},"PeriodicalIF":4.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of mechanical and thermal properties of diamond under external stress","authors":"Hai-Dong Li ,&nbsp;Ya Wen ,&nbsp;Yu Shen ,&nbsp;Er-Peng Wang ,&nbsp;Shen-Jin Zhang ,&nbsp;Qi-Long Yuan ,&nbsp;Nan Jiang ,&nbsp;Yong Bo ,&nbsp;Qin-Jun Peng","doi":"10.1016/j.diamond.2024.111810","DOIUrl":"10.1016/j.diamond.2024.111810","url":null,"abstract":"<div><div>Diamond exhibits ultra hardness and thermal conductivity, which makes it widely utilized in industrial cutting, electronic devices, and laser technology, where these applications typically require diamond to maintain excellent performance under extreme conditions. Ultimate strength, hardness, and fracture toughness are key parameters that determine its durability. Investigating the evolution of mechanical properties under stress provides deeper insights into its deformation mechanisms and failure modes in extreme environments, facilitating the optimization of diamond for high-stress applications. For thermal properties, the high thermal conductivity makes it highly valuable for heat dissipation in electronic and photonic devices. Stress can change the mechanisms of phonon induced by lattice vibration within the diamond, leading to changes in its thermal conductivity. Understanding these variations can further enhance its heat dissipation capabilities in high-power devices. In this paper, the comprehensive mechanical and thermal properties of diamond under uniaxial stress and hydrostatic pressure are investigated systematically based on the first-principles. The elastic constants including Young's modulus, bulk modulus, shear modulus and Poisson's ratio enhance with the compressive stress and diminish with the tensile stress. The isotropy of bulk modulus is broken due to the deformation of different directions under external stress. Based on the elastic constants, it demonstrates that the mechanical properties of diamond enhance with the compressive stress and diminish with the tensile stress. The thermal properties including Debye temperature, sound velocity (longitudinal, transverse and average velocity) and minimum thermal conductivity also enhance with the compressive stress and diminish with the tensile stress. The fundamental reason for the above phenomenon is that applied stress changes the lattice structure of diamond. And the structural symmetry of diamond is broken along with the redistribution of charge around C atoms, that leads to a new equilibrium state. The phonons that contribute to the thermal conductivity also change with stress. These theoretical results provide valuable insights into the influence of stress on the mechanical and thermal properties of diamond. We also provide basic theoretical practical guidance for the use of Raman laser in diamond under high stress environment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111810"},"PeriodicalIF":4.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-step process for creating nitrogen and oxygen-enriched carbon using organic polymers for supercapacitor applications","authors":"Ria Deb,&nbsp;Rimpi Gogoi,&nbsp;Gitish K. Dutta","doi":"10.1016/j.diamond.2024.111811","DOIUrl":"10.1016/j.diamond.2024.111811","url":null,"abstract":"<div><div>The growing concern over sustainable energy motivates and stimulates the production of sophisticated and portable energy storage devices like batteries and supercapacitors. The widespread use of batteries has been hampered because of their low shelf-life and power density, whereas supercapacitors are recognized to have high power density with longer cycle life. In the genre of supercapacitors, heteroatom-doped carbon materials are the most promising participants for energy-related applications. Specifically, nitrogen and oxygen-incorporated carbon materials have gained considerable progress because they can modify the carbon framework's chemical and physical properties, thereby enhancing the electrochemical performance. Nitrogen and oxygen co-doped porous carbon was synthesized through a simple one-pot reaction of the precursors (2,6-diaminopyridine and terephthalaldehyde) with KOH. The optimized material (DAPT-4-600) exhibits a specific capacitance of 339 F g⁻¹ (at 1 A g⁻¹) in 1 M H₂SO₄ and complete capacitance retention after 10,000 cycles. The enhanced electrochemical behavior of DAPT-4-600 can be attributed to its moderate surface area, pore volume, and nitrogen/oxygen functional groups. Also, when assembled in a symmetric device, DAPT-4-600 shows an energy density of 11.11 W h kg⁻¹ at a power density of 250 W kg⁻¹.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111811"},"PeriodicalIF":4.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of physico-mechanical and electrochemical properties of zinc-rich epoxy coatings by optimised interfacial behaviour of reduced graphene oxide","authors":"Peng Wang,&nbsp;Jian Wei,&nbsp;Enhao Lv,&nbsp;Zhuang Miao,&nbsp;Yanbin Zhang,&nbsp;Yuerong Li","doi":"10.1016/j.diamond.2024.111815","DOIUrl":"10.1016/j.diamond.2024.111815","url":null,"abstract":"<div><div>High porosity and low utilization of zinc powder are two major challenges for conventional zinc-rich epoxy (ZRE) coatings. Although these two challenges can be overcome by the addition of graphene material, it also brings new challenges due to the addition of more fillers leading to degradation of mechanical properties and galvanic coupling corrosion. In this work, the effect of the interfacial behaviour of reduced graphene oxide (RGO) in coatings on the mechanical properties, shielding properties and cathodic protection properties of RGO/ZRE composite coatings has been comprehensively evaluated. In terms of mechanical properties, RGO additions of 0.3 wt%, 0.75 wt% and 1.2 wt% exhibited RGO enhancement stage, RGO interfacial compatibility influence stage and RGO agglomeration influence stage. In terms of cathodic protection performance, RGO additions of 0.3 wt%, 0.75 wt% and 1.2 wt% exhibited a zinc powder utilization enhancement stage, an accelerated zinc powder consumption stage by galvanic coupling corrosion, and a significantly reduced initial shielding stage, respectively. The RGO/ZRE composite coating has the best comprehensive performance at 0.3 wt% RGO addition, and the composite coating did not crack or peel off in impact and bending tests, the coefficient of friction was 0.64465, the width of abrasion mark was 1.18 mm, and the coating adhesion was 5.81 MPa. The 0.3 wt%-RGO/ZRE composite coating has insignificant galvanic coupling corrosion and has a cathodic protection time of 720 h, and significantly higher low-frequency impedance modulus than the ZRE coatings. The shielding, mechanical, and cathodic protection properties of ZRE coatings can be significantly improved with appropriate RGO additions, and the galvanic coupling corrosion and agglomeration induced by the high RGO content are the key factors limiting the application of RGO in the coatings.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111815"},"PeriodicalIF":4.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of microwave absorption properties of strontium hexaferrite (SrFe12O19) and graphitic‑carbon nitride (g-C3N4) composite in X-band range","authors":"S. Jacob Rosarian Joy,&nbsp;D. Rajan Babu","doi":"10.1016/j.diamond.2024.111813","DOIUrl":"10.1016/j.diamond.2024.111813","url":null,"abstract":"<div><div>To improve microwave absorption in the X-band frequency range (8.2–12.4 GHz), this work describes the creation and characterization of a new composite material made of graphitic carbon nitride (g-C₃N₄) and strontium hexaferrite (SrFe₁₂O₁₉). Easy manufacturing techniques were used to ensure uniformity and the best possible distribution of both components in the composite. Using the vector network analyzer, microwave absorption characteristics were examined, with reflection loss (R_L) serving as the primary performance metric. The composite material exhibited remarkable absorption of microwaves, as evidenced by its considerable reflection loss of −59.22 dB at a thickness of 4 mm. It was discovered that the main factor influencing this improved performance was the synergistic interaction between strontium hexaferrite and graphitic carbon nitride.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111813"},"PeriodicalIF":4.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}