ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Xiangkun Li,Ruitao Li,Weichen Zhao,Zhaochen Xi,Diming Xu,Yang Liu,Lixia Pang,Pengjian Wang,Qin Guo,Xiaogang Yao,Haiyi Peng,Huixing Lin,Di Zhou
The development of frequency-agile devices is constrained by the permittivity–tunability trade-off in ferroelectric materials, where high tunability is typically accompanied by excessive permittivity and dielectric loss. Conventional ceramic/polymer composites can alleviate impedance mismatch but suffer from severe tunability degradation due to depolarization effects. Here, we report a quasi-parallel ferroelectric composite that enables improved decoupling between permittivity, loss, and tunability. This is achieved via a cross-scale dual-correction strategy, where fine sol–gel-derived Bi 6 Ti 5 WO 22 particles enhance wall densification while controlled freezing reduces structural defects and improves alignment. Furthermore, real-structure finite-element modeling demonstrates that mitigating these microstructural deviations is essential for maximizing local electric field utilization. The resulting 15 vol. % composite exhibits a high dielectric tunability of 50% at 30 kV cm −1 , retaining ∼ 83% of the bulk ceramic tunability, together with an ultralow dielectric loss (tan δ < 0.001) at room temperature. A high figure of merit (FOM) of 633 is achieved at a permittivity more favorable for impedance matching than that of conventional ferroelectric ceramics. These results demonstrate that cross-scale structural and material optimization provides an effective strategy for high-performance tunable dielectric composites.
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高影响因子
Advanced Healthcare Materials
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2023
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IF 10
Chen Zhuang,Guanglin Zhu,Yingjun Wang,Lin Wang,Xuetao Shi,Chuanbin Mao
Insoluble metal bisphosphonates (BPs) are considered an ideal alternative to the soluble counterparts in regenerative medicine due to their increased BP release profile, but still present undesired properties (e.g., low stability, uncontrolled degradation, and poor biocompatibility). Through a simple crystallization on a solid calcium hydroxyapatite (HA)-based substrate from a BP precursor solution in 30 days, a series of insoluble calcium BP (CaBP) crystals are developed. These crystals, including calcium alendronate (CaAln), calcium pamidronate (CaPam), calcium incadronate (CaInc), calcium risedronate (CaRis), calcium zoledronate (CaZol), and calcium di-minodronate (Ca(Min) 2 ), present high purity, regular morphologies and excellent biodegradability. It is demonstrated that these CaBPs can induce osteogenic differentiation of adipose-derived mesenchymal stem cells in vitro in the absence of other osteogenic inducers. It is further found that CaBP induces bone formation more effectively in a femur defect rabbit model in three months but with a lower in vivo hematotoxicity than the clinically used HA during osteogenesis. It is believed that these desired biological properties arise from the capability of the insoluble CaBPs in releasing BPs in a sustained manner for stimulating osteogenesis. This work provides a significant strategy for turning CaBPs into novel biomaterials for tissue regeneration and demonstrates their great potential in the clinic.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Yang Wang,Wenjie Yuan,Weijian Han,Jianwei Gao,Hao Li,Tong Zhao
A simple and scalable approach to fabricate monodispersed Si 3 N 4 hollow microspheres (Si 3 N 4 HMs) with uniform spherical structures is proposed in this study. This approach involves spray drying of Si 3 N 4 precursor, followed by carbothermal reduction nitridation. The homogeneous Si 3 N 4 precursor was first obtained by mixing phenolic resins and silicon resins, which are carbon and silicon sources, respectively. The spray drying process was then tuned by regulating the viscosity of the precursor by adding polyvinyl butyral in an appropriate ratio. Next, the hollow precursor microspheres were pyrolyzed at 1500 °C for 6 h, while ensuring that the shells of the obtained Si 3 N 4 HMs remained intact. Porous Si 3 N 4 ceramics with different contents of Si 3 N 4 HMs were then prepared using the gel-casting method. It was observed that the densities and dielectric constants of the porous Si 3 N 4 ceramics decreased with an increasing Si 3 N 4 HMs content. Thus, the proposed approach can be used for the synthesis of Si 3 N 4 HMs, that can be further processed into ceramic materials with both low densities and dielectric constants.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Yushi Qi,Kai Jiang,Changling Zhou,Wenbo Han,Zhiming Du
The development of novel cermet composites based on porous ceramics with high porosity, interconnected pore structure and good mechanical property has attracted considerable attention in engineering application. In this work, water-based freeze casting process was employed to fabricate ZrB 2 -SiC porous ceramic with aligned lamellar-channels structure using PAA-NH 4 as the dispersant. The results revealed that the well-dispersed suspension with best rheological behavior was obtained using 1.0 wt% PAA-NH 4 at pH 9. The crack-free porous ceramic exhibited small volume shrinkage ranging from 2.59 % to 1.87 %. By varying the solid loading, the fabricated samples displayed a tailored porosity ranging from 76.12% to 59.37% and an excellent compressive strength of 7 MPa to 78 MPa. After oxidation, the samples displayed a decreased porosity and an increased compressive strength. The ZrB 2 SiC porous ceramic fabricated in this work will be a promising candidate for the framework of cermet composite.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2019
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IF 4.182
Hang Qin,Wenming Guo,Xin Huang,Pengzhao Gao,Hanning Xiao
α-Al 2 O 3 nanoparticles with a particle size of ~10 nm were synthesized from aluminum alkoxide precursor chelated by oxalic acid at 500 °C and added to boehmite sol as phase transition seeds (PTS) in low temperature preparation of α-Al 2 O 3 ultrafiltration (UF) membrane. With the PTS doping of 2.5 wt%, a single phase α-Al 2 O 3 membrane with small pore size of 7.2 nm was prepared at 950 °C. After long-term static and dynamic corrosion tests, the as-prepared α-Al 2 O 3 UF membrane was found to no significant degradation in performance, displaying a stable MWCO and water permeability of 15 kDa and 85 L/(m 2 h bar) respectively. In the decolorization of vinegar fermentation wastewater, the COD removal was 63% whereas the color removal could reach 98%. Furthermore, the contaminated membrane could be reused many times after cleaning, confirming the excellent durability and practicality of α-Al 2 O 3 UF membrane in wastewater treatment .
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Kunhan Chen,Dong Wang,Jiawei Du,Qikuan Cheng,Lu Zhang,Weibang Xia,Yunming Wang,Huamin Zhou
Challenges remain in the design and manufacture of acoustic devices with excellent broadband sound absorption performance. Herein, an efficient acoustic absorber with hierarchical pore structure and additional acoustic-electrical energy conversion mechanism is reported in which combined zirconia porous ceramics and P(VDF-TrFE) piezoelectric aerogels. Reticular cross-scale pore structure enables sound waves to propagate and dissipate effectively. The vibrations generated by piezoelectric aerogels under acoustic excitation further consume sound waves through converting acoustic energy into electrical energy based on the local piezoelectric and triboelectric effect, which improves the medium and low-frequency sound absorption capability. The average sound absorption coefficient of the prepared acoustic composites reaches 0.87 while the noise reduction coefficient is 0.54. Furthermore, the composites also possess low density, high compressive strength, good hydrophobicity and thermal insulation properties for applications. Therefore, this innovative strategy offers new design ideas for the next generation of high-performance acoustic materials with promising applications in transportation and industrial construction.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Shuang Yin,Yao Zhang,Wei Wan,Xia Fang,Haiqiang Ma,Xinchun Xie,Tianyu Li,Xuewen Jiang,Aiwen Xie,Liqiang Liu,Cong Zhou,Ruzhong Zuo
Porous Si 3 N 4 ceramics were fabricated by combining gelcasting and pressureless sintering. The roles of sintering temperatures and sintering additives (Y 2 O 3 , Al 2 O 3 , and Y 2 O 3 -Al 2 O 3 ) in regulating phase composition, microstructure, sintering, mechanical, and dielectric properties of porous Si 3 N 4 ceramics were systematically studied. Compared with Y 2 O 3 and Al 2 O 3 , owing to the lower eutectic temperature, Y 2 O 3 -Al 2 O 3 was more effectively in promoting the particle rearrangement and dissolution-diffusion-reprecipitation processes during high-temperature sintering, leading to higher phase transformation degree of α→β-Si 3 N 4 , larger aspect ratio of columnar β-Si 3 N 4 grains, and higher densification of porous Si 3 N 4 ceramics. Furthermore, the increasing sintering temperature and the present β-Si 3 N 4 seeds within the raw powders were also conducive to phase transformation of α→β-Si 3 N 4 , β-Si 3 N 4 growth, and developing highly interlocking microstructure contributing to strengthening mechanical properties. At 10 wt% Y 2 O 3 and 5 wt% Al 2 O 3 , the complete phase transformation of α→β-Si 3 N 4 and sufficient β-Si 3 N 4 growth were achieved by pressureless sintering at 1750 ℃ for 1 h. The apparent porosity, bulk density, flexural strength , and fracture toughness of porous Si 3 N 4 ceramics reached 2.7%, 2.98 g/cm 3 , 450.9 MPa, and 4.35 MPa·m 1/2 , respectively, exhibiting superior mechanical properties. At 2 wt% Y 2 O 3 and 1 wt% Al 2 O 3, the resulting porous Si 3 N 4 ceramics had dielectric constant of 4.28–4.38 and dielectric loss tangent of 2.1 × 10 −3 -3.2 × 10 −4 throughout X-band, showing good microwave transmission properties. This study indicates that the gelcasting combined with pressureless sintering was proved to be a feasible method to prepare high-strength and low-dielectric porous Si 3 N 4 ceramics using Y 2 O 3 -Al 2 O 3 as sintering additives.
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JOURNAL OF LUMINESCENCE
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2025
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IF 3.6
Huanyu Zhao,Jinsheng Li,Yan Jiang,Yao Lu,Lei Wang,Yi Xie,Wenlong Zhou,Yang Li,Xudong Sun
(Y,Ce) 3 Al 5 O 12 (YAG:Ce) ceramic is considered to be a suitable phosphor converter with a high quantum efficiency and excellent thermal stability for laser-driven lighting. However, the lack of red emission in the spectrum of YAG:Ce leads to the poor color quality of white light under excitation of laser diodes (LDs). Although current solutions were investigated to improve the color rendering index (CRI), they inevitably cause the decreased luminous efficacies (LE). How to balance the two luminous properties is still troubling researchers. In this study, a novel composite structure with large YAG:Ce grains surrounded by fine YAG:Cr grains was obtained by the two-stage hot-pressing process. The energy transfer between Ce 3+ and Cr 3+ was reduced because they were in different phases due to the structural design, thus improving the red emission while avoiding a sharp decline in the yellow emission. Moreover, there was no reaction and difference in thermal expansion coefficient between two phases due to the same matrix of YAG. Furthermore, the reflection loss in YAG:Cr‒YAG:Ce composite ceramic was reduced compared to layered-structure ceramics. Therefore, the maximal CRI reached 71.3 and the maximal LE was 255.8 lm/W, indicating an excellent application prospect in laser-driven lighting.
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ACS Applied Engineering Materials
·
2025
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IF 3.5
Beibei Huang,Kunhan Chen,Jiawei Du,Zhaohan Yu,Dong Wang,Lu Zhang,Qikuan Cheng,Weibang Xia,Yunming Wang,Huamin Zhou
Large-wavelength low-frequency sound waves are highly penetrative, and existing acoustic load-bearing structures struggle to achieve effective absorption across different media through pore and molecular chain regulation. The development of high-performance underwater acoustic materials is constrained by the limited tunability of traditional microporous structures and the poor pressure stability of viscoelastic polymers. Here, we present a microporous composite structure enhanced by piezoelectric nanoparticle filling for efficient low-frequency sound absorption. This design integrates porous ceramics with microporous piezoelectric polymers to form a multilayer resonant system, wherein embedded nanocomposites facilitate additional sound reflection, resonance, and interfacial collisions. These interactions synergistically promote both acoustic-thermal and acoustic-electric energy dissipation, enabling high-efficiency low-frequency sound absorption within a compact architecture. The optimized structure achieves a noise reduction coefficient of 0.54, with the onset frequency of the sound absorption coefficient exceeding 0.8 as low as 840 Hz. Under hydrostatic pressure ranging from 0.1 to 2 MPa, the attenuation of the average sound absorption coefficient was only 36.62%, significantly lower than the 75.61% observed in conventional polyurethane. In addition, the acoustic–electric conversion property endowed composites with the capability to sense sound waves, while the composite’s lightweight, stress-resistant, and hydrophobic characteristics support mechanical stability and underwater applicability. This work achieves superior broadband absorption and excellent pressure stability, offering a compact, multifunctional solution for advanced acoustic systems.
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