Journal of Materials Science: Materials in Electronics最新文献

{"title":"Phase evolution and dielectric tuning in samarium and cobalt Co-doped bismuth ferrite nanoparticles via sol–gel synthesis","authors":"M. M. Rhaman,&nbsp;M. S. Islam,&nbsp;M. A. Islam,&nbsp;M. S. Miah,&nbsp;Syed Kamrul Hasan","doi":"10.1007/s10854-026-17411-9","DOIUrl":"10.1007/s10854-026-17411-9","url":null,"abstract":"<div><p>Bismuth ferrite (BFO) has emerged as a promising multifunctional material for electronic applications. This study demonstrates that 10% Sm³⁺ substitution in Bi_1-ySm_yFe_1-xCo_xO₃ effectively suppresses the Bi₂₅FeO₄₀ impurity phase and induces a structural transition from rhombohedral (R3c) to orthorhombic (Pnma) symmetry. Yet, achieving phase-pure nanoparticles through sol–gel synthesis remains challenging. Co doping reduced the average grain size from ~ 85 nm to ~ 42 nm and significantly enhanced the dielectric constant while minimizing dielectric loss at high frequencies, confirming the material’s suitability for tuned electronic applications. Bond length and bond angle analysis from XRD-CIF reconstruction confirmed lattice distortion induced by doping. Morphological characterization using FESEM and TEM demonstrated spherical, uniformly distributed nanoparticles with reduced particle size upon increasing dopant concentration. High-resolution TEM and SAED patterns further verified the polycrystalline nature and consistency with XRD results. Dielectric studies revealed significant trends in dielectric constant, dielectric loss, real and imaginary parts of electrical modulus, dielectric loss per unit volume, and imaginary part of permittivity. The magnetic measurements demonstrate a significant enhancement in saturation magnetization (M_s), which increased from 0.67 emu/g (pure BFO) to 1.85 emu/g for the Bi_0.85Sm_0.15Fe_0.85Co_0.15O₃ sample. This improvement is supported by an increase in the Bohr magneton (η_B) from 0.037 to 0.103 μ_B and a rise in the anisotropy constant (K_a) to 7.8 × 10⁴ erg/cm³. These findings highlight the effectiveness of Sm and Co co-doping in tuning the phase structure and dielectric response of BFO nanoparticles, offering pathways for their integration into advanced electronic and energy storage devices.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829795","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":"Sol-gel synthesis of PZT hollow microtubes: an alternative single-step method using milkweed fiber as a bio-template","authors":"Karthika P. Moni,&nbsp;Baindla Ankitha,&nbsp;Maneesh Chandran","doi":"10.1007/s10854-026-17425-3","DOIUrl":"10.1007/s10854-026-17425-3","url":null,"abstract":"<div><p>Lead zirconate titanate (PZT) is a piezoelectric material that exhibits excellent piezoelectric and ferroelectric properties. PZT microtubes are now receiving significant attention for various applications such as sensors, actuators, and energy harvesters. PZT microtubes are often synthesized using a sacrificial template, which involves complex steps to remove the parent template. In this work, we introduce an alternative approach for synthesizing PZT microtubes utilizing a bio-template. The structural characteristics of PZT microtubes are analyzed using x-ray diffraction and Raman spectroscopy, while the hollow tubular morphology is confirmed using FESEM analysis. The formation of PZT microtubes with diameters ranging from 13 to 15 µm was confirmed by FESEM images. The complete decomposition of the bio-template during the annealing process was ensured by Fourier transform infrared spectroscopy. Piezoresponse force microscopy images confirm the ferroelectric nature of the microtubes through contrast reversal under opposite bias polarities of ± 10 V, indicating polarization switching. This study demonstrates that bio-templating is a better alternative for synthesizing phase-pure PZT hollow microtubes, as it avoids the necessity of removing the parent template from the synthesized microtubes.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829794","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":"rGO/Au/BaTiO3 nano composite based self-powered breath sensor","authors":"Amruta D. Bang,&nbsp;Vandana Inamdar,&nbsp;Vaishali Ingale,&nbsp;Anisha B. Patil,&nbsp;Parag V. Adhyapak","doi":"10.1007/s10854-026-17387-6","DOIUrl":"10.1007/s10854-026-17387-6","url":null,"abstract":"<div><p>Self-powered technology is an emerging transformative force for the next generation of medical devices. These are the systems/sensors that can harvest energy from their environment such as mechanical vibrations, body movement, airflow, or thermal gradients—and use it to power themselves continuously. This opens up a new paradigm for the sensors systems. Breathing is a very subtle process which is continuously happening in all the living animals. Here we have reported a self-powered breath sensor that can detect the breathing pattern while continuously harvesting energy from the breath. Here we have prepared a nanocomposite of reduced graphene oxide, Gold and Barium titanate. This Nano composite based sensor generated maximum capacitance of 100 nF for exhale breath sensing with ultrafast response time of 6.7 ms and recovery time of 1.3 s. The sensor generates a power of 6.48 nano watts per breath. This rGO/Au/BaTiO₃ based self-powered exhaled breath sensor has the potential to be used in practical biomedical devices due to its accurate consistent and stable response.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829940","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":"Research progress on broadband electromagnetic wave absorption properties of polyurethane/graphene composites","authors":"Jiayin Li,&nbsp;Bo Wang,&nbsp;Wen Wen,&nbsp;Chenyu Wu,&nbsp;Zelong Zhou,&nbsp;Jiaqi Wei,&nbsp;Nana Zhang,&nbsp;Jiafei Wang,&nbsp;Haibo Zhang,&nbsp;Jiadong Zang,&nbsp;Hua Tan","doi":"10.1007/s10854-026-17383-w","DOIUrl":"10.1007/s10854-026-17383-w","url":null,"abstract":"<div><p>As electromagnetic environmental issues become increasingly prominent, particularly in scenarios where multiple frequency bands coexist—such as 5G/satellite communications, radar, and Wi-Fi—there is a growing need for efficient, thin, and lightweight electromagnetic wave absorption materials across wide bandwidths (e.g., 2–18 GHz) to mitigate electromagnetic interference and leakage risks. Polyurethane (PU) and graphene (GR) have emerged as focal points in broadband absorber research due to their lightweight properties, processability, and tunable dielectric characteristics. This paper systematically reviews the limitations of traditional absorption materials, focusing on recent advances in PU/GR composite absorption materials regarding composition, fabrication techniques, and absorption mechanisms. It analyzes key mechanisms affecting broadband absorption—including dielectric loss, impedance matching, and multiple scattering—through specific case studies. The paper identifies key shortcomings in current research—such as impedance mismatch caused by GR agglomeration, the trade-off between thin-film thickness and broadband performance, environmental stability, and standardization of fabrication processes—while proposing feasible optimization strategies and future research directions. This aims to provide researchers in the field with clear, actionable design and fabrication recommendations.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829900","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":"pH-Regulated precipitation synthesis of copper vanadate nanomaterials for enhanced photocatalytic degradation","authors":"Yanan Zhang,&nbsp;Junhe Zhang,&nbsp;Zhehao Cui,&nbsp;Yiming Gao,&nbsp;Yong Zhang,&nbsp;Lizhai Pei","doi":"10.1007/s10854-026-17415-5","DOIUrl":"10.1007/s10854-026-17415-5","url":null,"abstract":"<div><p>Copper vanadate nanomaterials have attracted widespread attention as promising photocatalysts for the degradation of organic pollutants due to their narrow bandgap and efficient visible light absorption ability. In this study, copper vanadate nanosheets Cu₃V₂O₇(OH)₂·2H₂O were synthesized using a simple precipitation method and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. The photocatalytic performance of Cu₃V₂O₇(OH)₂·2H₂O prepared under different pH conditions was evaluated through methylene blue degradation experiments using a xenon lamp under simulated solar-light irradiation. Results showed that Cu₃V₂O₇(OH)₂·2H₂O nanomaterials at pH = 12 exhibited high photocatalytic activity, achieving an MB degradation rate of 81%, with an apparent rate constant of 0.0140 min⁻¹, demonstrating their potential in wastewater treatment applications. Electrochemical impedance spectroscopy and zeta-potential analyses showed that the pH = 12 sample possessed improved interfacial charge-transfer behavior and favorable surface charge characteristics. Catalyst-dosage and MB-concentration gradient experiments identified 50 mg as the optimum catalyst dosage, while higher initial MB concentration reduced the degradation efficiency. After five successive cycles, the degradation efficiency decreased by only 9%, indicating good reusability and cycling stability. To further investigate the photocatalytic mechanism, various free radical scavengers were employed to identify the key reactive species involved in the degradation process. Hydroxyl radicals (·OH) and photogenerated holes (h⁺) played a crucial role in the degradation of methylene blue. Kinetic analysis of the photocatalytic reaction indicated that the degradation of methylene blue followed a pseudo-first-order kinetic model. These results indicate that Cu₃V₂O₇(OH)₂·2H₂O can serve as an efficient and environmentally friendly photocatalyst for organic pollutant degradation, providing a promising strategy for wastewater treatment.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829901","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":"Rational design of MXene-integrated AgWO₃/rGO ternary nanocomposites: electrochemical behavior analysis for advanced supercapacitor applications","authors":"Muhammad Naveed Anjam,&nbsp;Basma A. El-Badry,&nbsp;Fozia Shaheen,&nbsp;Hany S. Hussein,&nbsp;Zeenat Zaidi,&nbsp;Mahvish Fatima","doi":"10.1007/s10854-026-17396-5","DOIUrl":"10.1007/s10854-026-17396-5","url":null,"abstract":"<div><p>The development of novel ternary composites is essential for enhancing the performance of supercapacitor electrodes. A ternary nanocomposite electrode, MXene@AgWO₃–rGO, was synthesized via a hydrothermal method and confirmed through structural, morphological, and functional characterization. Electrochemical measurements were performed in 3 M KOH using a three-electrode system, yielding a specific capacitance of 1151 F g⁻¹ at a current density of 1 A g⁻¹. The ternary composite demonstrated superior energy and power densities of 85.22 Wh kg⁻¹ and 9100.25 W kg⁻¹, respectively, and better cycling stability, with 93.2% capacitance retention after 10,000 cycles. Further, the MXene AgWO₃–rGO//AC asymmetric supercapacitor device has a specific capacitance of 370 F g⁻¹, high coulombic efficiency (99.2%), and 89.8% retention after 4000 cycles. MXene@AgWO₃–rGO nanocomposite is a highly developed electrode material for future energy storage systems.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829899","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":"Solvothermal synthesis of FeS2 and FeSe2: electronic structure and optical properties","authors":"Dong Zhang,&nbsp;Dingming Cao,&nbsp;Yuqi Gao,&nbsp;Xiangyu Li,&nbsp;Haodong Yan,&nbsp;Yalong Chen,&nbsp;He Zhang,&nbsp;Jing Bai,&nbsp;Haonan Yang","doi":"10.1007/s10854-026-17416-4","DOIUrl":"10.1007/s10854-026-17416-4","url":null,"abstract":"<div><p>Earth-abundant iron chalcogenides have attracted increasing attention as photoactive semiconductors because of their tunable electronic structures and favorable light-absorption properties. In this study, cubic pyrite FeS₂ and orthorhombic marcasite FeSe₂ were synthesized by a solvothermal method and systematically investigated through experimental characterization combined with density functional theory (DFT) calculations. X-ray diffraction (XRD) and Rietveld refinement confirmed the successful formation of pyrite FeS₂ and marcasite FeSe₂ and provided reliable crystal structure models. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and selected-area electron diffraction (SAED) analyses revealed clear morphological and crystallographic differences: FeS₂ particles were approximately spherical and polycrystalline, whereas FeSe₂ exhibited a block-like morphology with single-crystal-like characteristics. Vibrating sample magnetometry (VSM) measurements showed that both crystals are essentially non-magnetic at room temperature. Optical measurements gave band gaps of 1.02 eV for FeS₂ and 0.70 eV for FeSe₂, while DFT calculations yielded corresponding values of 0.94 and 0.52 eV, respectively. Both materials were identified as indirect-band-gap semiconductors, with band-edge states mainly arising from strong hybridization between Fe 3<i>d</i> and chalcogen <i>p</i> orbitals. Optical calculations further revealed high absorption coefficients on the order of 10⁵ cm⁻¹ for both compounds, while FeSe₂ showed a broader long-wavelength response due to its narrower band gap. Based on these results, pyrite FeS₂ appears more suitable for photovoltaic applications because of its favorable band gap range and strong UV–visible absorption, whereas marcasite FeSe₂ appears more suitable for near-infrared photodetection. This study provides insight into the structure–property relationships of Fe-based chalcogenides and offers guidance for their rational application in optoelectronic devices.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830131","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":"Synthesis of nickel ferrite nanoparticles and fabrication of PVA/CS-NiFe2O4 nanocomposite films for optoelectronic applications and electromagnetic interference shielding","authors":"Majeed Ali Habeeb,&nbsp;Jassim M. AL-Issawe,&nbsp;Anees A. Al-Hamzawi,&nbsp;Mamoun Fellah,&nbsp;Noureddine Elboughdiri","doi":"10.1007/s10854-026-17455-x","DOIUrl":"10.1007/s10854-026-17455-x","url":null,"abstract":"&lt;div&gt;&lt;p&gt;In this study, NiFe₂O₄ nanoparticles were synthesized using a sol–gel auto-combustion technique and incorporated into a biopolymer matrix composed of PVA and chitosan to produce flexible nanocomposite films aimed at EMI shielding applications. The structural analysis confirmed a clear an increase in crystallite size and crystallinity of the NiFe₂O₄ nanophase, while inducing partial amorphization in the polymer matrix due to strong interfacial interactions. FTIR results confirmed strong interactions between Ni&lt;sup&gt;2&lt;/sup&gt;⁺/Fe&lt;sup&gt;3&lt;/sup&gt;⁺ ions and the polymer functional groups, leading to partial amorphization of the matrix. The incorporation of these nanofillers significantly enhanced the dielectric properties, electrical conductivity, and nonlinear optical performance of the nanocomposites. This study examined the optical, structural, morphological, and electromagnetic interference (EMI) properties of (PVA–Cs/NiFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;) nanocomposites. The optical microscope images illustrate a uniform distribution of blended nanoparticles, forming a cohesive network within the polymer matrix. The findings regarding the optical characteristics show that absorbance, absorption coefficient, refractive index, dielectric constant (both real and imaginary), and optical conductivity rise with increased concentrations of (NiFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;) nanoparticles. Simultaneously, the transmittance of the nanocomposites diminishes with an increase in nanoparticle concentration. The band gaps of (PVA–Cs/NiFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;) polymer nanocomposites diminish from 4.56 to 3.63 eV for permitted transitions and from 4.21 to 3.26 eV for forbidden transitions when the concentration of (NiFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt;) nanoparticles increases the results indicate that the dispersion energy (E&lt;sub&gt;d&lt;/sub&gt;), average oscillator strength (S&lt;sub&gt;o&lt;/sub&gt;), and single oscillator energy (E&lt;sub&gt;o&lt;/sub&gt;) decrease progressively with increasing nanoparticle content. Conversely, the Urbach energy (E&lt;sub&gt;u&lt;/sub&gt;), linear optical susceptibility (χ&lt;sup&gt;1&lt;/sup&gt;), third-order nonlinear susceptibility (χ&lt;sup&gt;3&lt;/sup&gt;), nonlinear refractive index (n₂), oscillator wavelength parameter (λ&lt;sub&gt;o&lt;/sub&gt;), static dielectric constant (ε&lt;sub&gt;o&lt;/sub&gt;), and zero-frequency refractive index (n&lt;sub&gt;o&lt;/sub&gt;) show a consistent upward trend with higher nanofiller concentrations. From an electrical standpoint, the dielectric constant (ε′), dielectric loss (ε″), and electrical conductivity also increase as the nanoparticle loading rises, indicating enhanced polarization effects and improved charge carrier mobility within the nanocomposite matrix. The nanocomposite containing NiFe₂O₄ exhibited a total shielding effectiveness approaching ~ 65 dB, highlighting its capability to suppress electromagnetic pollution through absorption-dominated mechanisms. These results demonstrate that combining magnetic ferrite nanocrystals with a biodegradable polymer system offers a strategic route ","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830004","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":"Producing and tailoring the optical and radiation shielding features of SiC-SWCNTs-PVP-PVA polymeric nanocomposite for optoelectronic and radiation shielding applications","authors":"Sami S. Alharthi,&nbsp;Ali Badawi","doi":"10.1007/s10854-026-17361-2","DOIUrl":"10.1007/s10854-026-17361-2","url":null,"abstract":"<div><p>The current work aims to produce a multifunctional polymeric nanocomposite of SiC-SWCNTs-PVP-PVA as a potential candidate for futuristic applications in optoelectronics and radiation shielding. SiC-SWCNTs-PVP-PVA polymeric nanocomposites (PNCs) were made using the solution-casting technique. Morphological and microstructural characterizations were performed using optical and scanning electron microscopy, energy dispersive X-ray spectroscopy, and Fourier-transform infrared spectroscopy. The UV–visible spectrophotometry technique was utilized to examine the optical features. The optical analysis reveals a vital enhancement in the optical properties of the SWCNTs-PVP-PVA medium due to SiC nanocrystals (NCs) loading. In particular, it exposes that SiC loading modifies the transmittance, optical bandgap, refractive index, dielectric constants, and optical conductivity of the SWCNTs-PVP-PVA medium. The transmittance of the SWCNTs-PVP-PVA medium declines from 80 to 18% through SiC NCs loading. The direct/indirect bandgap decreased to 4.35 eV and 4.54 eV (SiC PNCs) compared to 5.07 eV and 4.92 eV (pure medium), respectively. Nonlinear optical (NLO) constants, such as the first-order (χ⁽¹⁾), third-order (χ⁽³⁾) susceptibility, and refractive index (n₂) were obviously improved. The χ⁽³⁾ value increases to 3.1 × 10⁻¹¹ esu compared to 2.67 × 10⁻¹¹ esu for pure medium. Phy-X/PSD software was applied to assess the photon radiation shielding performance for all PNCs. The linear and mass attenuation coefficients (LAC, MAC), half- and tenth-value layer (HVL, TVL), mean free path (MFP), and effective atomic number (Z_eff.) of SWCNTs-PVP-PVA medium are also reinforced with SiC NCs loading. At 15 keV photon energy, LAC of the SWCNTs-PVP-PVA medium increases to 2.52019 cm⁻¹ (SiC PNCs) compared to 1.37951 cm⁻¹ (pure). The MFP decreases to 0.3968 cm (SiC PNCs) compared to 0.72489 cm (pure). Overall, the SiC-SWCNTs-PVP-PVA PNCs are potential candidates for optoelectronic and radiation shielding developments.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829757","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":"Improved density and dielectric characteristics of Li2Mg3ZrO6-based ceramics by zirconium deficiency and LiF addition","authors":"Jinyang Li,&nbsp;Xiaolei Shi,&nbsp;Cheng Liu","doi":"10.1007/s10854-026-17442-2","DOIUrl":"10.1007/s10854-026-17442-2","url":null,"abstract":"<div><p>In order to optimize the porous structure and impurity phase caused by lithium volatilization, zirconium deficiency and sintering agent addition were adopted simultaneously to prepare Li₂Mg₃Zr_0.94O₆—x LiF(x = 0w–5t.%) samples. The effects of LiF on structural composition, morphology, and dielectric characteristics of Li₂Mg₃Zr_0.94O₆ were studied. The results showed that modest LiF can reduce sintering temperature from 1375 to 900 °C. XRD and refinement analysis demonstrated that the samples retain a single rock salt structure within 2 wt.% ≤ x ≤ 4 wt.%. The SEM analysis confirmed that the porosity and grain size of Li₂Mg₃Zr_0.94O₆–x LiF samples gradually decreased with increasing LiF. The <i>ε</i>_<i>r</i> and <i>Q</i> × <i>f</i> exhibited a trend of initially increasing and then decreasing, which was closely related to the ionic polarization, phase composition, porosity and grain size. Particularly, Li₂Mg₃Zr_0.94O₆–4 wt.% LiF sample displayed excellent dielectric characteristics at 900 °C:<i> ε</i>_<i>r</i> = 13.66, <i>Q</i> × <i>f</i> = 99,800 GHz (10.06 GHZ) and <i>τ</i>_<i>f</i> =  − 27.65 ppm/°C.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"37 13","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147830005","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}