Ceramics International最新文献

{"title":"Effect of La3+ and Eu3+ doping on the structural, microstructural, and ferroelectric properties of bismuth ferrite ceramics","authors":"Danijela Luković Golić ,&nbsp;Aleksandar Radojković ,&nbsp;Nataša Jović Orsini ,&nbsp;Nenad Nikolić ,&nbsp;Olivera Zemljak ,&nbsp;Goran Branković ,&nbsp;Zorica Branković","doi":"10.1016/j.ceramint.2025.02.234","DOIUrl":"10.1016/j.ceramint.2025.02.234","url":null,"abstract":"<div><div>This work investigates a series of ten ceramic samples with the compositions Bi_1-<em>x</em>La_<em>x</em>FeO₃ (<em>x</em> = 0.05, 0.10, 0.15), Bi_1-<em>y</em>Eu_<em>y</em>FeO₃ (<em>y</em> = 0.05, 0.10, 0.15), and Bi_{1-(<em>x</em>} ₊ _<em>y</em>)La_<em>x</em>Eu_<em>y</em>FeO₃ (<em>x</em> = <em>y</em> = 0, 0.025, 0.05, 0.075). The samples were synthesized through a hydro-evaporation method and subsequently subjected to sintering at 835 °C. The focus was on the relationship between the samples' structural and microstructural properties and their ferroelectric behavior. The study also emphasized the distinct effects of the La³⁺ and Eu³⁺ dopant ions on the material properties, contributing to a deeper understanding of the mechanisms influencing ferroelectricity in these complex ceramic systems. XRD analysis revealed that all lanthanum and europium substituted bismuth ferrite ceramics had the rhombohedral (<em>R</em>3<em>c</em>) structure as the dominant one, while the samples doped with 15 mol% of dopant ions contained the orthorhombic phases as well. The partial substitution of Bi³⁺ ions with 10 mol% of La³⁺ or Eu³⁺ and 15 mol% of La³⁺ resulted in significantly enhanced ferroelectric responses. These compositions showed larger remnant polarizations, higher coercive fields, and nearly square-shaped hysteresis curves compared to the undoped and other doped samples. The Bi_0.85La_0.15FeO₃ sample demonstrated the highest remnant electric polarization (<em>P</em>_r = 24 μC/cm²) when subjected to a 160 kV/cm electric field. Due to its unique structural and microstructural properties, the material exhibited nearly saturated hysteresis loops under high electric fields, accompanied by minimal leakage currents. The Bi_0.85Eu_0.15FeO₃ and Bi_0.85La_0.075Eu_0.075FeO₃ samples exhibited poor ferroelectric responses due to non-polar, orthorhombic structures in their composition. Generally, La and Eu-doping significantly reduced the leakage current densities of bismuth ferrite owing to a decrease in the concentration of oxygen vacancies, which are known to be a primary cause of electric conductivity in undoped ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20675-20689"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nano-engineered Fe-doped ZrO2: A novel and sustainable gamma ray shielding material synthesized via a green hydrothermal approach","authors":"Mohammad W. Marashdeh ,&nbsp;K.A. Mahmoud ,&nbsp;Islam G. Alhindawy","doi":"10.1016/j.ceramint.2025.02.192","DOIUrl":"10.1016/j.ceramint.2025.02.192","url":null,"abstract":"<div><div>This work presents the synthesis and characterization of nanostructured Fe-doped ZrO₂ as a novel shielding material against ionizing radiation, particularly gamma rays. Through a simple, environmentally friendly, and cost-effective hydrothermal synthesis technique, two samples of Fe-doped ZrO₂ nanoparticles were synthesized. The incorporation of iron ions into the ZrO₂ lattice aims to enhance the material's radiation attenuation capabilities by leveraging the synergistic effects of the host matrix and dopant. Comprehensive characterization techniques, including XRD, SEM, and EDX, were employed to investigate the structural, morphological, and elemental properties of the synthesized nanoparticles. The results revealed successful doping of iron ions into the ZrO2 lattice, accompanied by the formation of oxygen vacancies to maintain charge neutrality. The higher doping concentration sample exhibited larger crystallite sizes, reduced lattice distortions, and lower dislocation densities, suggesting enhanced structural integrity. Furthermore, the radiation shielding properties of synthesized Fe-doped ZrO₂ composites were evaluated using the experimental measurements, Monte Carlo simulation, and theoretical calculations. The experimental measurement shows that the linear attenuation coefficient of prepared composites over the interval of 0.662 MeV and 1.332 MeV decreased from 0.430 ± 0.014 cm⁻¹ to 0.301 ± 0.007 cm⁻¹ (for Fe1 composite) and decreased from 0.443 ± 0.013 cm⁻¹ to 0.302 ± 0.006 cm⁻¹ (for composite Fe2). The measured linear attenuation coefficient was found to be in agreement with the simulated and theoretically calculated data.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20270-20282"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles study of optical band gap modulation in CaTiO3-doped KNN lead-free ceramics","authors":"Jian He ,&nbsp;Junjun Wang ,&nbsp;Yufang Jiao ,&nbsp;Bingsen Wang ,&nbsp;Yan Mu ,&nbsp;Meng Liu ,&nbsp;Che Sun ,&nbsp;Danqing Liu ,&nbsp;Wenlong Yang ,&nbsp;Fengmin Wu","doi":"10.1016/j.ceramint.2025.02.255","DOIUrl":"10.1016/j.ceramint.2025.02.255","url":null,"abstract":"<div><div>In this study, the effects of CaTiO₃ (CT) doped (K_0.5Na_0.5)NbO₃ (KNN) (KNN-xCT. x = 0, 1/24, 1/12, and 1/8) on the structure, optical and ferroelectric properties were investigated through first-principles calculations and experimental analysis. The calculation results demonstrate that CT doping decreases the band gap of KNN-based materials, and the experimental results of optical band gap show excellent agreement with the theoretical calculations. The theoretically calculated band gap value is lower than the experimental value, which can be attributed to the inherent underestimation associated with the generalized gradient approximation (GGA). The reason of this is the formation of “traps” around the d orbitals of Ca atoms can significantly enhance the electrical performance of KNN-CT ceramics. The XRD results demonstrated the successful incorporation of CT into the KNN structure. The ferroelectric loop of KNN-1/24CT ceramics indicates that domains exhibit a more rapid response to the electric field than the undoped KNN ceramics near the coercive field due to narrowing of the band gap. Under the synergistic effect of Ca and Ti atoms, KNN-CT ceramics exhibit a denser band structure and a narrower band gap. This study provides theoretical insights and experimental analysis into improving the band structure, optical and electric properties of KNN ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20863-20869"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cobalt doped Fe3O4 nanoparticles with improved magnetic anisotropy and enhanced hyperthermic efficiency","authors":"Rahulgorky Sahayaraj ,&nbsp;Karolinekersin Enoch ,&nbsp;Sudhanshu Shekar Pati ,&nbsp;Anbumozhi Angayarkanni Somasundaram","doi":"10.1016/j.ceramint.2025.02.245","DOIUrl":"10.1016/j.ceramint.2025.02.245","url":null,"abstract":"<div><div>Magnetite nanoparticles are promising candidates for Magnetic Fluid Hyperthermia in cancer treatment, exploiting alternating magnetic fields to selectively generate heat in tumor tissues. However, achieving optimal hyperthermic efficiency within the clinical therapeutic window remains challenging due to the need for precise tuning of their magnetic and physical properties. To address this, we investigated the effects of doping Fe₃O₄ nanoparticles with varying concentrations of cobalt to enhance their magnetic properties, such as anisotropy constant and saturation magnetization. We synthesized a series of cobalt-doped Fe₃O₄ nanoparticles and characterized their physical and magnetic properties using X-ray diffraction, Fourier Transform Infrared spectroscopy, High-Resolution Transmission Electron Microscopy, and Vibrating Sample Magnetometry. Our results show that cobalt doping increases the coercivity of SPIONs, with values rising from 21.98 Oe at 2 wt% doping to 57.54 Oe at 5 wt% doping. However, this increase remains within a range that does not alter the superparamagnetic nature of the nanoparticles. The 2 % cobalt-doped Fe₃O₄ achieved a SAR of 25.87 W/g and an ESAR of 0.81 nH m²/kg, marking a substantial improvement over undoped Fe₃O_4. However, higher cobalt concentrations reduced hyperthermic efficiency. These findings suggest that low-level cobalt doping is an effective strategy to enhance the hyperthermic performance of Fe₃O₄ nanoparticles by improving the anisotropy and addressing the current limitations in magnetic hyperthermia applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20786-20797"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-temperature sintering and microwave dielectric properties of Ca2+ substituted Ba0.8-xCaxSr0.2CuSi2O6 ceramics","authors":"Xi Wang ,&nbsp;Fangyi Huang ,&nbsp;Jiaqing Du ,&nbsp;Hua Su ,&nbsp;Yuanxun Li ,&nbsp;Mingshan Qu ,&nbsp;Xiaoli Tang","doi":"10.1016/j.ceramint.2025.02.239","DOIUrl":"10.1016/j.ceramint.2025.02.239","url":null,"abstract":"<div><div>For matching formulation of Ba_0.8−xCa_xSr_0.2CuSi₂O₆ (BSCS-Ca_x) (x = 0–0.1) ceramics with low-temperature co-fired ceramic materials, in this study, BSCS-Ca_x ceramics were synthesized by a solid-state reaction method, Further, the sintering temperature was reduced to 925 °C by adding a small amount of LBSCA glass (0.4 wt%) and BSCS-Ca_x+0.4 wt% LBSCA (BSCS-Ca_x-L) ceramics were obtained. X-ray diffraction analysis revealed that the BSCS-Ca_x-L ceramics consisted of three phases. The incorporation of Ca²⁺ ions did not introduce any new phases. Scanning electron microscopy images showed that the doping of Ca²⁺ promoted the grain growth of BSCS-Ca_x-L ceramics. Raman spectra were used to investigate the lattice vibrations and crystal structure properties. Energy-dispersive spectroscopy point scans of ceramic samples co-fired with Ag showed that the BSCS-Ca_x-L ceramics did not react with Ag, and thus ceramics were chemically compatible with Ag. The best microwave dielectric properties of BSCS-Ca_x-L ceramics, including <em>ε</em>_<em>r</em> = 7.84, <em>Q × f</em> = 42,500 GHz, and <em>τ</em>_<em>f</em> = −16 ppm⋅°C⁻¹, were obtained at an optimized value of x = 0.02.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20727-20732"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced gas sensing characteristics of rGO-TiO₂ nanocomposites: Synthesis, structural, optical characterization and sensitivity analysis for environmental monitoring","authors":"Girish Murlidhar Rajguru ,&nbsp;Rakesh Kumar Mishra ,&nbsp;Vijay S. Raykar ,&nbsp;Pankaj P. Khirade","doi":"10.1016/j.ceramint.2025.02.159","DOIUrl":"10.1016/j.ceramint.2025.02.159","url":null,"abstract":"<div><div>The modified Hummers' method was employed to synthesize graphene oxide (GO), while titanium dioxide (TiO₂) nanoparticles were produced using the sol-gel process. These nanoparticles were then hydrothermally blended to create rGO-TiO₂ nanocomposites, which contain rutile, anatase, and brookite phases of TiO₂ alongside varying oxidation levels of reduced graphene oxide (rGO). The synthesis successfully yielded rGO-TiO₂ nanocomposites with uniformly dispersed TiO₂ nanoparticles on rGO sheets, using with varying concentration ratios of rGO:TiO₂ (10:0, 7.5:2.5, 5:5, 2.5:7.5, and 0:10). The average crystallite size increased from approximately 15.48 to 35.08 nm with higher TiO₂ concentrations, as supported by Williamson-Hall extrapolation. FTIR analysis revealed functional groups associated with both the hexagonal and tetragonal phases of the nanocomposite. HR-TEM analysis indicated a uniform TiO₂ particle size distribution, peaking at 204–210 nm. The Raman spectra confirmed the structural integrity of rGO and the presence of anatase TiO₂, with an energy band gap of ∼3.67 eV. The gas sensing characteristics highlighted enhanced sensitivity to NO₂ compared to other gases such as H₂S, CO, and NH₃. The results demonstrate that higher rGO content significantly improves the sensor's responsiveness and recovery dynamics, making these composites promising candidates for hazardous NO₂ gas detection in environmental monitoring and industrial safety applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 19923-19941"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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-high frequency treatment: Toughening PEO coating of Zr alloys by dispersed small pores","authors":"Lei Liu ,&nbsp;Shuai Dong ,&nbsp;Xiao-Bo Chen ,&nbsp;Fulin Wang ,&nbsp;Fenghua Wang ,&nbsp;Jie Dong","doi":"10.1016/j.ceramint.2025.02.144","DOIUrl":"10.1016/j.ceramint.2025.02.144","url":null,"abstract":"<div><div>Plasma electrolytic oxidation (PEO) ceramic coatings are known to exhibit porosity and brittleness, while the regulation of pores into more dispersed and smaller structures is a proven method for enhancing the toughness of ceramics. In this work, ultra-high frequency (≥10 kHz) pulse current was applied to modify the discharge pores in the PEO coating of Zr alloys. Cross-sectional morphology reveals that large pores in the outer layer of the coating at 10 kHz exhibited a diameter of about 10 μm, showing a remarkable reduction in comparison to that at 0.1 (40 μm) and 1 kHz (25 μm). Particularly, a porous sublayer was identified in this coating, with pore diameters measuring less than 1–2 μm and a thickness approximately half that of the outer layer. It was proposed that, with the increase of frequency, the refined pores and increased pore number are respectively attributed to the reduced pulse on time and increased number of pulse discharges. Vickers indentation tests indicate that the coatings at 0.1 and 1 kHz occurred distinct fracturing under a load of 49 N, whereas no notable fracture was observed in the coating at 10 kHz under 196 N load. This suggests that the dispersed small pores at ultra-high frequency can inhibit the initiation and propagation of cracks effectively, thereby enhancing the toughness of the PEO coating significantly. This work offers a critical insight into the toughening of PEO coatings.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 19761-19779"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uniform distribution and thermal corrosion behavior of in-situ synthesized (Nb,Ta)C by laser cladding based on ultrasonic vibration effect","authors":"Gaoqiang Jiang ,&nbsp;Ying Chen ,&nbsp;Xiankai Meng ,&nbsp;Shu Huang ,&nbsp;Jianzhong Zhou","doi":"10.1016/j.ceramint.2025.02.230","DOIUrl":"10.1016/j.ceramint.2025.02.230","url":null,"abstract":"<div><div>To solve the issue of delamination and aggregation of in-situ synthesized (Nb,Ta)C during the laser cladding, ultrasonic vibration was employed to suppress and fracture the ceramic phase, enhancing the overall uniform distribution and surface property. The regulation mechanism of ultrasonic vibration on pore porosity, surface morphology, microstructure, and phase evolution has been systematically studied. The growth inhibition, growth fragmentation, and uniform distribution evolution process of (Nb,Ta)C ceramic phase have been deeply revealed. The correlation between thermal corrosion behavior and microstructure evolution, including (Fe,Ni) phase and (Nb,Ta)C ceramic phase, has been established. The results indicated that the pore area percentage decreases from 2.67 % to 0.24 %, and the surface roughness and fluctuation degree are reduced after uniform distribution treatment of ultrasonic vibration. Micron (Nb,Ta)C, which is suppressed and fragmented into submicron sizes, is uniformly distributed between grains, thereby enhancing the surface hardness and overall hardness uniformity of the coating. Narrow grain boundaries (including subgrain boundaries) and uniformly distributed submicron (Nb,Ta)C jointly hinder the internal expansion of oxygen element, causing the oxide layer thickness to decrease from 286 μm to 43 μm.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20628-20642"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonic-assisted green synthesis and characterization of nano-hydroxyapatite from Cirrhinus molitorella fish scales bio-waste for biomedical applications","authors":"Sathiskumar Swamiappan,&nbsp;Xin Xie,&nbsp;Chengyu Lu,&nbsp;Xinsheng Peng","doi":"10.1016/j.ceramint.2025.02.215","DOIUrl":"10.1016/j.ceramint.2025.02.215","url":null,"abstract":"<div><div>Herein, we demonstrate a facile green procedure to produce natural nano-hydroxyapatite (nHAp) using an ultrasonic-assisted method from <em>Cirrhinus molitorella</em> fish scale bio-waste. Characterization results confirmed the successful preparation of nHAp without any impurities. Further, X-ray diffraction (XRD) peaks matched the hydroxyapatite standard JCPDS 00–009–0432, which also confirmed the hexagonal pattern of nHAp. Fourier-transform infrared (FT-IR) spectroscopy analysis exhibited the existence of phosphate, hydroxyl, and B-type carbonate groups. The energy dispersive X-ray spectroscopy (EDX) was utilized to determine the calcium/phosphorous (Ca/P) molar ratio, which is 1.67. Further, the elemental composition of nHAp was identified using X-ray photoelectron spectroscopy (XPS) and EDX analysis. The surface area (111.96 m² g⁻¹), pore size (14.81 nm in diameter), and pore volume (0.4167 cm³ g⁻¹) of prepared nHAp were confirmed by the Brunauer-Emmett-Teller (BET). Atomic force microscopy (AFM) was employed to measure the shape parameters and surface roughness, and it was confirmed that nHAp has a dominant spiky surface. Transmission electron microscopy (TEM) showed the agglomerated rod-like nanostructured morphology of the nHAp powder. Thermogravimetric analysis (TGA) results of nHAp exhibited excellent thermal stability and a low weight loss (9.7 %). The mechanical properties of nHAp were checked using the measurement of compressive strength value, which was 114 ± 4.70 MPa. The hemolysis rate of nHAp powders was less than 3 %; hence, nHAp powders can be considered non-hemolytic material. The MTT results indicate that the prepared nHAp is more biocompatible with human osteosarcoma (MG-63) cells, which shows excellent cell viability compared to commercial hydroxyapatite (cHAp). Moreover, nHAp encourages the development of MG-63 cells, which exhibit better Giemsa staining and alkaline phosphatase (ALP) activity than cHAp. The size, structure, functional groups, compressive strength, hemocompatibility, and superior biocompatibility of synthesized nHAp make it suitable for use as a biomaterial in the biomedical field.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20452-20464"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-performance Fe-Cr-Si-B-C soft magnetic composites for high-frequency application through chemical liquid coating","authors":"Zhangqiao Zhou,&nbsp;Qi Li,&nbsp;Jiaxin Gao,&nbsp;Yan Nie,&nbsp;Xian Wang","doi":"10.1016/j.ceramint.2025.02.216","DOIUrl":"10.1016/j.ceramint.2025.02.216","url":null,"abstract":"<div><div>Soft magnetic composites (SMCs) composed of insulating Fe-Cr-Si-B-C magnetic powders are essential for high-frequency power electronic devices. Thin, uniform coatings are crucial for minimizing high-frequency core losses, driving research efforts toward efficient coating technologies. In this study, a uniform Al₂O₃ coating was achieved via the hydrolysis and dehydration of aluminum isopropoxide (AIP), effectively reducing high-frequency eddy current losses in SMCs. The rotating calcination process converts coatings from AlO(OH) into Al₂O₃ and forms crystal-like orders (CLOs, ∼1 nm) within the Fe-Cr-Si-B-C powder, which enhances saturation magnetization. At 1 MHz, the effective permeability reaches 33.3, with a DC bias performance of 75.45 % at 100 Oe and a core loss of 391.7 mW/cm³ at 20 mT. This study establishes a universal chemical liquid coating method for SMCs, meeting low-cost and high-efficiency coating needs of SMCs.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 15","pages":"Pages 20465-20474"},"PeriodicalIF":5.1,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}