Journal of Materials Science: Materials in Electronics最新文献

{"title":"Enhanced superconducting properties in bulk MgB2 through spark plasma sintering of ball-milled and sieved crystalline boron","authors":"Malik Shadab, Yiteng Xing, Jacques Noudem, Muralidhar Miryala","doi":"10.1007/s10854-024-13475-7","DOIUrl":"https://doi.org/10.1007/s10854-024-13475-7","url":null,"abstract":"<p>In this study, in situ bulk MgB₂ superconducting samples were sintered using spark plasma sintering (SPS) and characterized through various techniques, including X-ray diffraction (XRD), microstructure evaluation, and magnetization measurements. XRD analysis confirmed that MgB₂ was the primary phase, with a secondary phase of MgO present in the sintered samples. Scanning electron microscopy (SEM) analysis revealed minimal porosity, and the bulk densities reached 95% of the theoretical value for MgB₂, as calculated by mass volume. The samples exhibited remarkably high critical current densities (<i>J</i>_<i>c</i>), up to 405 kA/cm² in self-field at 10 K, representing a 67% improvement over solid-state sintering. These high <i>J</i>_<i>c</i> values are attributed to the enhanced density of the bulk, which increases the superconducting area, which underscores the importance of density enhancement achieved through SPS and the MgB₂ nanograins obtained via ball milling, and sieving of crystalline boron played a crucial role in this improvement.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Neodymium substitution on electrical properties in mixed phase of Bismuth containing pyrochlore (Bi2Sn2O7 and Bi2O3–SnO2)","authors":"M. Asadullah Nadir, Muhammad Khalid, Muhammad Younas, M. G. B. Ashiq, Arshi, Imen Kebaili, Burhanuddin, Hafsa Najam","doi":"10.1007/s10854-024-13482-8","DOIUrl":"https://doi.org/10.1007/s10854-024-13482-8","url":null,"abstract":"<p>In this paper, Neodymium-doped Bismuth pyrochlore and its hybridized mixed phases (Nd_<i>x</i>Bi_2-<i>x</i>Sn₂O₇ and Bi₂O₃–SnO₂) were synthesized using the sol–gel autocombustion method. The synthesized material was annealed at 600 °C for three hours in a muffle furnace to ensure its crystalline structure, and X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) analysis were conducted. Fourier Transform Infrared (FTIR) spectroscopy was employed to predict the phases and absorption frequencies. Subsequent to a comprehensive structural analysis, the dielectric properties, encompassing the real and imaginary components of Impedance, Electric modulus, dielectric constant, and tangent loss, were analyzed. This analysis spanned a frequency range from 1 MHz to 3 GHz, covering different doping concentrations. Notably, the maximum dielectric constant was attained for a doping concentration of <i>x</i> = 1.0 at 2.7 GHz. Conclusively, the obtained dielectric data suggest that the synthesized material holds promise for various applications, including high-frequency electronics, telecommunications, and wireless communication systems.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing electromagnetic interference shielding performance of polyester fabrics through composite polymer coating with metal oxides and expanded graphite","authors":"Erdem Tevfik Özdemir, Zeynep Ertekin, Sukran Kara, Mustafa Erol, Mustafa Seçmen","doi":"10.1007/s10854-024-13480-w","DOIUrl":"https://doi.org/10.1007/s10854-024-13480-w","url":null,"abstract":"<p>Radio frequency (RF) devices, in which use of high frequency electromagnetic waves, may cause electromagnetic interference (EMI), have been an essential part of the human being due to their large area applications especially as transmitters, receivers, computers, televisions, and mobile phones. However, the pollution caused by RF and/or EMI should not be underestimated. For this reason, studies have been carried out to develop shielding properties against EMI of various products, in particular of wearable fabrics. With this manner, in this study, composite polymer coated textiles were designed and produced by utilizing polyester base fabric, polyvinylidene fluoride coating polymer (matrix) and some additives (fillers) such as expanded graphite (E-GR), bismuth oxide (Bi₂O₃) and copper oxide micro/nano-particles. The experimental design on the preparation of the samples based on the unary, binary, and ternary combinations of the additives was created to investigate their combined effects on the EMI shielding performances. Samples were characterized by scanning electron microscopy, energy dispersive spectroscopy, fourier-transform infrared spectroscopy, and vector network analyzer. According to the results, it can be inferred that the fillers are homogeneously distributed along the all surface without a chemical interaction with the matrix of continuous and compact composite coatings. Among the samples, the highest EMI performance with 19 dB shielding effectiveness was recorded for the sample containing E-GR and Bi₂O₃ in which of the 98.74% electromagnetic signals were blocked along 8–12 GHz frequency range.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of Sb on the microstructure and creep behaviors of Sn–6.5Zn–0.3Cu Pb-free solder alloy","authors":"M. Ragab, Hind Alsnani, A. E. Hammad, Ashraf S. Abd‑Elrahman","doi":"10.1007/s10854-024-13421-7","DOIUrl":"https://doi.org/10.1007/s10854-024-13421-7","url":null,"abstract":"<p>The objective of this research is to investigate the role of Sb addition on the microstructure and creep behaviors of the Sn–6.5Zn–0.3Cu solder alloy. Concerning microstructure examinations, the results exhibited that the Sb addition to the Sn–6.5Zn–0.3Cu alloy successfully produced uniform dispersion of γ-Cu₅Zn₈ and Sb₂SnZn intermetallic compounds (IMCs) along with α-Zn and β-Sn matrix, resulting in the microstructure refinement. In addition, because Cu–Zn and Sb–Sn–Zn IMC particles formed, the adverse effects of the oxidation resistance of Zn were reduced. The results showed that the microstructure and creep behaviors of the Sn–6.5Zn–0.3Cu-based alloy improved with Sb addition. Specifically, the creep resistance of the Sn–6.5Zn–0.3Cu alloy was greatly improved by the addition of 3.0 Sb and 1.0 Sb, resulting in enhancements of around 460% and 170%, respectively, due to the solid solution and finely dispersed IMCs. Due to the solid solution’s strengthening and the various dispersed IMCs, the Sb-containing solder alloys also displayed prolonged creep lifetimes and the highest stress exponents. In view of results, the microalloying of Sb in Sn–6.5Zn–0.3Cu-based alloy has produced dependable, high-performance creep properties that satisfy the needs of the industrial applications.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of molding process on sintering and properties of (Mg1-xZnx)2SiO4 high-frequency dielectric ceramics","authors":"Hanbi Zhang, Xiangchun Liu, Kai Zhang, Jiayan Guan, Danni Chen, Miao Zhang, Jiahao Liu, Ziyao Wei, Feng Gao","doi":"10.1007/s10854-024-13440-4","DOIUrl":"https://doi.org/10.1007/s10854-024-13440-4","url":null,"abstract":"<p>(Mg_1-<i>x</i>Zn_<i>x</i>)₂SiO₄ (<i>x</i> = 0.2, 0.4, 0.6, 0.8) ceramics were prepared by different molding methods, the sintering characteristics and high-frequency dielectric properties of ceramics with different ratios were studied, and the optimum Mg/Zn ratio was determined under the experimental conditions. X-ray diffraction (XRD) patterns show that the specimens have a Forsterite structure when <i>x</i> &lt; 0.4, while when <i>x</i> ≥ 0.4, the specimens have a Willemite structure. SEM images suggested that the density of hot pressing (Mg_0.4Zn_0.6)₂SiO₄ ceramics is better than that of dry pressing. The (Mg_1-<i>x</i>Zn_<i>x</i>)₂SiO₄ ceramics obtained by hot pressing show an overall increase in bulk density. (Mg_0.4Zn_0.6)₂SiO₄ ceramics have the best high-frequency dielectric properties when sintered at 1325 °C, and the performance parameters of dry pressing and hot pressing are <i>ε</i>_<i>r</i> = 6.74, <i>tanδ</i> = 8.88 × 10^–4 and <i>ε</i>_<i>r</i> = 6.36, <i>tanδ</i> = 1.35 × 10^–3, respectively.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron density mapping using maximum entropy method and room temperature magnetism in Cr3+ substituted SnS2","authors":"N. Pavithra, M. Charles Robert","doi":"10.1007/s10854-024-13447-x","DOIUrl":"https://doi.org/10.1007/s10854-024-13447-x","url":null,"abstract":"<p>Powder X-ray diffraction (XRD) data were used to analyze the electrical and local structure of dilute magnetic materials, namely SnS₂ substituted with 2.5%, 5%, and 7.5% chromium (Cr³⁺). These materials are magnetic semiconductors with applications in spintronics, half metals, and valleytronics. This study uses XRD data to investigate the electron density mapping and bonding behavior of 3D and 2D MEM (maximum entropy method). It also looks at interstitial charge buildup that occurs outside of the normal lattice. Adding Cr³⁺ to pure Tin disulfide (SnS₂) results in mild magnetic properties, with a maximum magnetization of (0.0077, 0.0174, and 0.0322) emu/g and a coercivity of (169.9, 166.2, and 110.3) Oe at 2.5%, 5%, and 7.5% Cr³⁺ concentrations, respectively. When using MEM electron density analysis, there is a substantial link between magnetic saturation and coercivity. SnS₂ substituted with 7.5% Cr³⁺ exhibits the lowest interstitial charge, leading to a higher magnetic field. The analysis of cation deficiencies using XRD data is utilized to investigate optical absorption and energy gap manipulation. According to photoluminescence (PL) emission studies, the presence of Cr³⁺ substitution has no direct effect on SnS₂ systems. Substitution of Cr³⁺ in SnS₂ increases the vacancy/interstitial charge, resulting in an indirect link with photoluminescence (PL) output. Electron spin resonance (ESR) analysis reveals the presence of both interstitial and substitutional Cr³⁺ ions. SEM/HRTEM with SAED reveals the polycrystalline nature of the samples with grains. The study revealed a link between charge buildup at substitutional and interstitial sites, bonding type and strength, and physical properties such as magnetic and optical properties.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexible magnesium-ion-conducting solid poly-blend electrolyte films for magnesium-ion batteries","authors":"Pradeep Nayak, Ismayil, Y. N. Sudhakar, M. S. Murari","doi":"10.1007/s10854-024-13458-8","DOIUrl":"https://doi.org/10.1007/s10854-024-13458-8","url":null,"abstract":"<p>Solid biodegradable polymer electrolyte systems are considered the optimal choice for energy storage devices because they are both cost-effective and energy-efficient. A solid blend polymer electrolyte (SBPE) membrane capable of transporting magnesium ions was prepared using a mixture of 70 wt% methylcellulose, 30 wt% chitosan, and varying wt% magnesium perchlorate salt. X-ray diffraction analysis revealed an increase in the amorphous nature caused by the inclusion of Mg(ClO₄)₂ salt in the polymer blend matrix. A Fourier transform infrared spectroscopy study of samples containing varying salt concentrations revealed secondary interactions between polymer segments and salt, which provides the basis for energy density. Moreover, through impedance analysis, it was determined that the bulk resistance decreased with increasing salt concentration. The SBPE containing 30 wt% magnesium perchlorate exhibited the highest ionic conductivity, with a value of 2.49 × 10^–6 S cm⁻¹. A comprehensive evaluation of the ion transport parameters, including mobility, carrier density, and diffusion, was conducted for the prepared electrolyte samples. Notably, an ionic transference number (t_ion) of approximately 0.83 was observed for the SBPE sample with 30 wt% magnesium salt, indicating ions’ prevalence as the system’s primary charge carriers. Electrochemical analyses demonstrated that the SBPE with the highest ion conductivity possessed an electrochemical stability window (ESW) of 1.92 V. Additionally, the thermal characteristics of the samples were evaluated using thermogravimetric analysis (TGA) to assess the thermal stability of the electrolyte. Finally, the highest conducting polymer electrolyte was employed to construct a primary magnesium battery, and its discharge profile with different cathode materials was studied. Based on these findings, the current study suggests an environmentally friendly, biodegradable, and economically viable electrolyte option suitable for separator cum electrolytes in magnesium-ion batteries.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spin-coated films of calix[4]resorcinarenes as sensors for chlorinated solvent vapours","authors":"Rifat Çapan, İnci Çapan, Frank Davis, Asim K. Ray","doi":"10.1007/s10854-024-13457-9","DOIUrl":"https://doi.org/10.1007/s10854-024-13457-9","url":null,"abstract":"<p>Spun thin films were fabricated using two different calix[4]resorcinarene materials. SPR curves of the calix[4]resorcinarenes along with an uncoated gold layer were determined. Exposure of the calix[4]resorcinarene films to organic vapours led to their adsorption into the thin film with concurrent changes in film thickness and refractive index which caused shifts in the SPR curves. Kinetic graphs were obtained as a result of the repeated exposure of the film to 20–40–60–80–100% of saturated vapour for up to seven cycles. Chloroform, dichloromethane, carbon tetrachloride and trichloroethylene vapours were all utilised for the gas exposures and kinetic curves obtained for each compound. Differences in the film nature and adsorption properties are discussed. Differences in vapour adsorption were noted, with the calix[4]resorcinarenes being most effective at binding chloroform.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical properties and structural rigidity of [(GeSe2)75(Sb2Se3)25]100−xTex chalcogenide glasses for potential applications in infrared filters and lenses","authors":"Reetu Chauhan, Yasser A. M. Ismail, K. A. Aly, Pankaj Sharma, Ram Chhavi Sharma, Chetna Tyagi, Sunanda Sharda","doi":"10.1007/s10854-024-13445-z","DOIUrl":"https://doi.org/10.1007/s10854-024-13445-z","url":null,"abstract":"<p>Chalcogenide glasses are promising candidates for advanced optical applications due to their tunable optical properties and structural stability. This paper presents the theoretical and optical investigations of the [(GeSe₂)₇₅(Sb₂Se₃)₂₅]_{100<i>−x</i>}Te_<i>x</i> (<i>x</i> = 0, 2.5, 5, 7.5, 10) chalcogenide glass system. Bulk samples have been fabricated using the classic melt quenching technique, followed by thermal evaporation to deposit thin films on glass substrates. Optical parameters, including the absorption coefficient, optical bandgap, and Urbach energy, have been estimated using absorbance spectra. A blue shift in the absorption edge has been observed, resulting in decreased optical bandgap values. A blue shift in the absorption edge has been observed, resulting in decreased optical bandgap values, while the refractive index increased with Te addition, attributed to increased material density. The mean coordination number values exceeded 2.4, indicating a rigid glassy structure. Additionally, the system demonstrated enhanced infrared transmission with a red shift in the absorbance spectra. The increased optical density and packing density with Te doping suggest potential optical applications, i.e., in infrared filters and lenses.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fe/Li Co-doped CuO: enhanced photosensing and conductivity correlated with structural modifications","authors":"Prashant Kumar Mishra, Rachit Dobhal, Somaditya Sen","doi":"10.1007/s10854-024-13463-x","DOIUrl":"https://doi.org/10.1007/s10854-024-13463-x","url":null,"abstract":"<p>The photocatalytic and electronic properties of sol–gel-prepared divalent Fe³⁺ and Li⁺ co-doped monoclinic (c2/c) Cu_0.945Fe_0.055-xLi_xO powders were investigated. O-ions are in excess in Fe-rich samples, whereas O-vacancies (Vo) are prevalent in Li-rich samples due to the valence state differences between Fe³⁺ and Li⁺ ions. The bandgap remained largely unaffected, but lattice disorder increased with higher Li content. The electrical conductivity (<i>σ</i>) increased with increasing Li content. While the <i>p</i>-type nature decreased with increasing Li content, the electron mobility decreased with increasing Li content. The photocatalytic decomposition of harmful methylene blue (MB) dye was maximum for Cu_0.945Fe_0.0275Li_0.0275O. For both Cu_0.945Fe_0.055O and Cu_0.945Li_0.055O, the degradation was lesser due to other physical processes, e.g., changes in the photocurrent. Light detection was faster in Fe-rich samples compared to pure and Li-rich samples. An attempt was made to form a heterojunction of ZnO/Cu_0.945Fe_0.014Li_0.041O that exhibited significantly faster response times than their bulk counterparts for both pure and Li-rich samples. These findings highlight the potential of Cu_0.945Fe_0.055-xLi_xO samples and heterojunction configurations for enhanced photocatalytic and sensing applications.</p>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}