Ceramics International最新文献

{"title":"Sol-gel synthesis of efficient p-type Ca2+@Bi-ferrites for gas sensing and photocatalytic applications","authors":"Farah Fahim ,&nbsp;Muhammad Ramzan ,&nbsp;Beriham Basha ,&nbsp;Asad ur Rehman Khan ,&nbsp;Majid Niaz Akhtar ,&nbsp;Sajawal ur Rehman Khan ,&nbsp;Amal M. Al-Mohaimeed ,&nbsp;Wedad A. Al-onazi ,&nbsp;Abdul Rehman ,&nbsp;M.S. Al-Buriahi","doi":"10.1016/j.ceramint.2025.03.322","DOIUrl":"10.1016/j.ceramint.2025.03.322","url":null,"abstract":"<div><div>Herein, we report the sol-gel synthesis and characterizations of pure and Calcium (Ca) doped Bismuth ferrites (BiFeO₃) for H₂S gas sensing and Cr (VI) pollutant reduction. X-ray diffraction confirmed the rhombohedral structure along the RC3 space group of synthesized ferrites. Raman analysis and EDX spectroscopy confirmed the cooperation of Ca²⁺ ions in the host lattice. Contraction in optical bandgap was observed with increasing concentration of Ca²⁺ dopants. Sensitivity towards the reducing gas (H₂S) recorded increased from ∼4.5 for pure BiFeO₃ to ∼ 226 for 18 % Ca²⁺ doped BiFeO₃. The response time of 18 % Ca²⁺ doped BiFeO₃ remained very fast 1–2 s in 5 ppm–25 ppm exposure of H₂S gas. The gas-responsive curves exhibited the p-type behavior of ferrites and such fast and improved response time was not reported in p-type semiconductors. Furthermore, the Cr (VI) dye degradation was recorded under the illumination of visible light and the 35W Xe arc lamp is taken as the source of visible light. The photodegradation of Cr (VI) improves significantly from 58 % for pure BiFeO₃ to 90 % for 18 % Ca²⁺ doped BiFeO₃. The photostability of 18 % Ca²⁺ doped BiFeO₃ is well because the reduction of Cr (VI) recorded up to ∼64 % for 20 cycles. Substitution of Bi³⁺ with Ca²⁺ causes the oxygen vacancies and the amount of Fe³⁺ valance potentials altered significantly as well as 18 % Ca²⁺ doped BiFeO₃ illustrated the iron (IV) higher amount state (Fe⁴⁺) with valence band at 2.47 eV and conduction band at 0.61 eV vs. normal hydrogen electrode. These findings depict that the 18 % divalent (Ca²⁺) doped BiFeO₃ is an excellent candidate for H₂S gas sensing and photocatalytic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 26411-26421"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522570","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":"The effects of co-implanting strontium (Sr) and helium (He) into SiC at temperatures exceeding the critical amorphization temperature and annealing above 1000 oC","authors":"T.T. Hlatshwayo ,&nbsp;T.F. Mokgadi ,&nbsp;S.S. Ntshangase ,&nbsp;Z.A.Y. Abdalla ,&nbsp;E.G. Njoroge ,&nbsp;T. Nguyen ,&nbsp;A. Sohatsky ,&nbsp;V.A. Skuratov","doi":"10.1016/j.ceramint.2025.03.140","DOIUrl":"10.1016/j.ceramint.2025.03.140","url":null,"abstract":"<div><div>The structural evolution and migration behaviour of strontium (Sr) in polycrystalline silicon carbide (SiC) co-implanted with helium (He) exceeding 300 °C were investigated at temperatures above 1000 °C. Sr ions were implanted into SiC at 600 °C (denoted as Sr-SiC-600) and co-implanted with He ions at 350 °C (denoted as Sr + He-SiC-600). Both samples were subsequently isochronally annealed at 1100 °C, 1200 °C, and 1300 °C for 5 h. Both as-implanted and annealed were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), atomic force microscopy (AFM), and Rutherford backscattering spectrometry (RBS). Implantation at 600 °C resulted in a defective layer embedded in the crystalline SiC. Co-implantation led to the formation of He platelets in the defective layer, as well as blisters and large voids on the surface accompanied by slight migration of Sr. Annealing the Sr-SiC-600 samples up to 1300 °C resulted in formation of Sr precipitates accompanied by neither migration nor loss. Contrary annealing Sr + He-SiC-600 samples up to 1300 °C resulted in the formation of Sr precipitates accompanied by some loss of Sr. These results indicate trapping of Sr in both samples. This trapping was influenced by thermally activated cavities in the Sr-SiC-600 samples and by He induced cavities in the Sr + He-SiC-600 samples. These findings have significant implications for the design and performance of TRISO fuel particles.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 24574-24582"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518722","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":"Combined effect of refractory and refining slag on inclusions in tire cord steel","authors":"Guodong Song ,&nbsp;Zhiyin Deng ,&nbsp;Miaoyong Zhu","doi":"10.1016/j.ceramint.2025.03.211","DOIUrl":"10.1016/j.ceramint.2025.03.211","url":null,"abstract":"<div><div>To understand the combined effect of refractory and refining slag on the inclusions in tire cord steels, steel grade LX72A was reacted with different MgO crucibles (impurity CaO &lt;0.05 %; Al₂O₃ 1.45 %–4.98 %) and different slags [basicity <em>R = w</em>(CaO)/<em>w</em>(SiO₂), 0.6–1.0] in laboratory at 1550 °C, and the variation of the inclusion in steel was investigated. It was found that without slag, the MgO matrix and the impurities of Al₂O₃ and CaO in the crucibles would result in the increases of MgO, Al₂O₃ and CaO contents in inclusions. When the slags were employed, the increasing trend of MgO, Al₂O₃ and CaO contents in inclusions would be constrained by the slags, and lower slag basicity presented a stronger effect of containment. Besides, more Al₂O₃ impurities in crucibles cause a higher Al₂O₃ content in the inclusions. Two heats with different crucibles and slags may obtain close Al₂O₃ contents in the inclusions, <em>e.g.</em> (crucible Al₂O₃ 4.98 % and slag <em>R</em> = 0.8) vs. (crucible Al₂O₃ 2.77 % and slag <em>R</em> = 1.0). In this case, the combined effects of refractory and refining slag on the inclusions need to be considered. When the refractory contains relatively higher impurities, slag with lower basicity should be chosen. In contrast, relatively higher basicity can be considered in case of high refractory purity.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 25290-25298"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144518985","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":"Effect of halloysite nanotubes on poloxamer 407-containing calcium phosphate cement for bone repair applications","authors":"Yeeun Kim,&nbsp;Kazumitsu Sekine,&nbsp;Kenichi Hamada","doi":"10.1016/j.ceramint.2025.03.132","DOIUrl":"10.1016/j.ceramint.2025.03.132","url":null,"abstract":"<div><div>Owing to the associated biocompatibility, bioactivity, and osteoconductivity, calcium phosphate cements (CPCs) are widely used for bone repair and augmentation. Despite these advantages, commercially available CPCs often exhibit insufficient strength and injectability for clinical applications. In this study, we aimed to address these limitations by incorporating halloysite nanotubes (HNTs) and poloxamer 407 into CPCs. HNTs, known for their high mechanical strength, modulus, specific surface area, and aspect ratio, were added to improve the mechanical properties of the CPCs. To enhance injectability and minimize leakage from the bone defects, poloxamer 407 was incorporated into the CPCs. The incorporation of HNTs significantly enhanced the compressive strength (CS) of the cement to cement without HNTs, achieving a maximum improvement of 6.8 MPa, which corresponds to a 16.9 % increase. The injectability decreased over time for all pastes during the poloxamer 407 sol-gel transition. HNT incorporation did not negatively affect cell viability or induce cytotoxicity, and enhanced cell adhesion and spreading were observed on the CPC surfaces, as demonstrated by <em>in vitro</em> studies using MC3T3-E1 cells. Alkaline phosphatase activity assays indicated improved osteogenic differentiation with HNTs. These results suggest that incorporating up to 3 wt% HNTs into CPCs optimizes their mechanical properties and biological performance, making them suitable for load-bearing applications in bone tissue engineering. Nevertheless, future <em>in vivo</em> studies are necessary to validate these findings and establish the clinical utility of HNT-reinforced CPCs incorporating poloxamer 407.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 24493-24501"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519016","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":"Effect of phase composition and microstructure on fracture toughness and thermal conductivity of gadolinia stabilized hafnia ceramics","authors":"Ren Chaolong ,&nbsp;Li Chun ,&nbsp;Jin Yu ,&nbsp;He Jian ,&nbsp;Ma Yue","doi":"10.1016/j.ceramint.2025.03.206","DOIUrl":"10.1016/j.ceramint.2025.03.206","url":null,"abstract":"<div><div>Due to excellent thermophysical properties, cubic (C) phase HfO₂ is a promising candidate for thermal barrier coatings. Improving its fracture toughness is still a critical challenge before its engineering application. In this study, we proposed a phase-engineering strategy by incorporating the monoclinic (M) phase into the cubic (C) matrix to improve fracture toughness. A series of GdO_1.5-doped HfO₂ ceramics, with general chemical formula Gd_<em>x</em>Hf_1-<em>x</em>O_{2-<em>x</em>/2} (0≤<em>x</em> ≤ 0.20), were prepared by solid-state sintering at 1600 °C. Dual-phase M + C composite ceramics were obtained when 0 &lt; <em>x</em> &lt; 0.2. Notably, a percolation-like cluster structure was generated when M phase content reached 35 vol%. In which the M phase formed percolating interconnected network inside the C phase matrix. This unique architecture enabled a remarkable 90 % enhancement in fracture toughness, reaching a maximum value of 2.46 MPa m^1/2 for Gd_0.14Hf_0.86O_1.93. Additionally, Gd_0.14Hf_0.86O_1.93 also maintained a relatively low thermal conductivity (2.0 W m⁻¹ K⁻¹ at 1200 °C), and the percolation-like clusters block radiative transport at high temperatures, resulting in thermal conductivities of the composite ceramics remaining constant. These findings demonstrate a synergistic approach to enhance mechanical durability and thermal insulation performance in advanced TBC materials, offering valuable insights for next-generation high-temperature applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 25239-25249"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519023","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":"Structural, morphological and electrical properties of α-Fe2O3 nanoparticles prepared by chemical route","authors":"Ammar T. Salih ,&nbsp;Sadeq H. Lafta ,&nbsp;Aus A. Najim ,&nbsp;Natheer B. Mahmood ,&nbsp;Ghaed K. Salman","doi":"10.1016/j.ceramint.2025.03.207","DOIUrl":"10.1016/j.ceramint.2025.03.207","url":null,"abstract":"<div><div>In this work, hematite α-Fe₂O₃ nanoparticles were synthesized by the chemical route technique. X-ray diffraction measurements confirmed the existence of a hematite phase with rhombohedral crystal structure upon calcination of as-synthesized goethite α-FeO(OH) at 600, 700, and 800 °C. The average crystallite size increased from 11.4 nm to 20.6 nm, while microstrain decreased from 2.27 × 10⁻³ to 1.25 × 10⁻³ with increasing calcination temperatures. Scanning electron microscopy micrographs and dynamic light scattering measurements revealed spherical nanoparticles with particle size distribution ranging from 200 nm to 500 nm. Fourier transform infrared spectroscopy spectra confirmed the existence of Fe-O and O-H bonds. The dielectric measurements in the frequency range from 100 Hz to 100 MHz exhibited extremely high dielectric constants ∼10⁹ at low frequencies and were found to increase with increasing calcination temperatures. Empirical models were proposed to estimate dielectric constants as a function of calcination temperature and crystallite size with excellent coincidence with the experimental data.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 25250-25257"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519024","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":"Enhancing the energy storage performance of NBT-based ceramics through grain boundary design","authors":"Jiaxin Wang,&nbsp;Sai Zhang,&nbsp;Lei Yang,&nbsp;Gang He,&nbsp;Zhanggui Hu","doi":"10.1016/j.ceramint.2025.03.191","DOIUrl":"10.1016/j.ceramint.2025.03.191","url":null,"abstract":"<div><div>The limited breakdown field strength of Na_0.5Bi_0.5TiO₃ (NBT) ceramics is considered a major obstacle to achieving high energy storage performance. Herein, a grain boundary design strategy was demonstrated by introducing BN nanosheets (BNNs) at the grain boundaries of 0.79Na_0.5Bi_0.5TiO₃-0.21NaNbO₃ (NBT-NN) ceramics to enhance the breakdown field strength and improve the energy storage performance. The effects of BNNs contents on the phase composition, microstructure, dielectric properties, and energy storage performance of NBT-NN ceramics were investigated. It was found that the BNNs dispersed along the grain boundaries of NBT–NN, significantly enhanced grain boundary resistance due to their excellent insulating properties, thereby substantially improving the breakdown field strength (E_b). In the NBT-NN-0.1 wt% BNNs composite ceramics, the breakdown field strength (280 kV/cm) increased by 21.7 %, and the recoverable energy storage density (W_rec = 5.67 J/cm³) improved by 41.4 %. The dielectric spectroscopy and impedance analysis were employed to investigate the dynamic evolution of the dominant resistive phase and the overall resistivity of the NBT-based ceramics. The addition of an appropriate amount of BNNs significantly enhanced the grain boundary resistance of NBT-NN ceramics, resulting in higher breakdown field strength and energy storage performance. This study shows that the design approach of introducing BNNs at the grain boundaries to enhance the breakdown field strength offers a novel perspective for improving the energy storage performance of NBT-based ceramics.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 25094-25102"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519054","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":"Hot corrosion behavior of Y2O3-doped lanthanum zirconate TBCs in Na2SO4+V2O5 environment","authors":"M.J. Moaveni ,&nbsp;H. Omidvar ,&nbsp;M. Farvizi ,&nbsp;S.M.H. Mirbagheri","doi":"10.1016/j.ceramint.2025.03.190","DOIUrl":"10.1016/j.ceramint.2025.03.190","url":null,"abstract":"<div><div>The improvement of hot corrosion performance of lanthanum zirconate (LZ) thermal barrier coatings (TBCs) has attracted significant interest in recent years. The hot corrosion behavior of a (La_0.6Y_0.4)₂Zr₂O₇ (LYZ) coating, resulting from the addition of Y₂O₃ to the La₂Zr₂O₇ structure, was evaluated in the current study. For this purpose, LZ and LYZ coatings were used as single-layer top coats. YSZ/LZ and YSZ/LYZ coatings, featuring a YSZ interlayer, were used as double-layer top coats. These top coats, along with a NiCrAlY bond coat, were then applied to the IN738LC substrate using atmospheric plasma spraying (APS). The fracture toughness of both LZ and LYZ was measured by Vickers indentation. The introduction of Y₂O₃ into the LZ resulted in an increase in fracture toughness from 0.81 MPam^0.5–1.28 MPa^0.5, as observed in the LYZ coating. The hot corrosion resistance of the samples was investigated in a cyclic mode. In each cycle, samples were exposed to a mixture of Na₂SO₄+V₂O₅ salts at 900 °C for 4 h. LYZ coating showed better performance in corrosive environments relative to the LZ coating. The LYZ coating, with its higher thermal expansion coefficient compared to the LZ coating, experienced reduced thermal stresses. This reduction contributed to a shift in the hot corrosion mechanism from thermomechanical to thermochemical. Furthermore, LaVO₄ was identified as the primary corrosion product for both coatings. However, in the LYZ coating, a small amount of Y₂O₃ dissolved within the LaVO₄, leading to a morphological change from cuboid to rod-shaped.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 25078-25093"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519206","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":"Optimising bismuth magnesium niobate pyrochlores as potential ceramic dielectrics: Reaction progression, phase equilibria and impedance properties","authors":"K.B. Tan ,&nbsp;P.Y. Tan ,&nbsp;Y. Feng ,&nbsp;C.C. Khaw ,&nbsp;T.Z. Alvin Lim ,&nbsp;M.M.A. Kechik ,&nbsp;S.K. Chen ,&nbsp;K.Y. Chan ,&nbsp;M. Lu ,&nbsp;J. Sun ,&nbsp;D. Zhou","doi":"10.1016/j.ceramint.2025.03.122","DOIUrl":"10.1016/j.ceramint.2025.03.122","url":null,"abstract":"<div><div>The phase-pure Bi₂O₃-MgO-M₂O₅ (BMN) cubic pyrochlores formed across a broad compositional range, with bismuth content varying from 41.88 to 44.50 mol %. The quadrilateral subsolidus region is defined by two substitution mechanisms: (i) Mg²⁺ substitution by Nb⁵⁺, balanced by oxygen stoichiometry variations and (ii) one-to-one Bi³⁺ replacement by Nb⁵⁺, with charge compensation by O²⁻. This yields a general formula of Bi_3.36+xMg_1.92-yNb_2.72-x + yO_{13.76-x+(3/2)y}, involving two variables with the corresponding subsolidus solution limits of 0.10 ≤ x ≤ 0.20 and 0.00 ≤ y ≤ 0.16, respectively. Notably, these BMN pyrochlores exhibit high dielectric constants, ε′ in the range of 167–204 at 30 °C, 1 MHz and low dielectric losses, tan δ in the order of 10⁻⁴ - 10⁻³. The elevated dielectric constant is likely due to the enhanced polarisability of Nb₂O₅ within the crucial BO₆ octahedra of the pyrochlore structure. Furthermore, these pyrochlores display negative temperature coefficients of permittivity, TCε' ranging from −528 to −742 ppm/°C at 30–300 °C and 1 MHz. These thermally stable and highly insulating BMN pyrochlores with high activation energies, Ea &gt;1.0 eV, are promising candidate for potential application in ceramic capacitors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 24371-24385"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519258","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":"Co-electrospun SiC nanoparticle-decorated SiC fiber hybrid materials towards highly effective and broadband electromagnetic attenuation performance","authors":"Yi Hou ,&nbsp;Baijun Chen ,&nbsp;Hui Zhang ,&nbsp;Pengyu Wang ,&nbsp;Zixin Wang ,&nbsp;Zhiqiang Liu ,&nbsp;Tiansheng Wang ,&nbsp;Lixi Wang","doi":"10.1016/j.ceramint.2025.03.170","DOIUrl":"10.1016/j.ceramint.2025.03.170","url":null,"abstract":"<div><div>High-temperature resistant performance for thermal end components has always been a key development direction in advanced microwave absorption materials. SiC fibrous materials could be served as the ideal candidate to meet the challenge of both lightweight and high temperature resistance. However, the relatively weak microwave attenuation capacity of pure SiC fibers greatly limit the further application. Herein, highly crystallized SiC nanoparticles (SiC_np) were decorated into the SiC fiber (SiC_f) matrix via co-electrospinning and high temperature pyrolysis. The resultant SiC_np@SiC_f composite fiber material possesses abundant heterogeneous interfaces to fascinate the dielectric loss, as well as the enhancement of conductivity loss. The optimized SiC_np@SiC_f sample pyrolyzed at 1300 °C exhibits a minimal reflection loss (RL_min) of −57.04 dB at 6.84 GHz, and the effective absorption bandwidth (EAB) reaches as wide as 7.5 GHz at 2.7 mm. With the filler content of only 10 wt%, the prepared SiC_np@SiC_f hybrid material could be applied as highly efficient and broadband ceramic microwave absorber.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 18","pages":"Pages 24884-24892"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519264","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}