JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Jia-Qi Zheng,Jian Chen,Ming Zhu,Wen-Hui Chen,Ning-Ning Ma,Xiu-Min Yao,Zheng-Ren Huang
N-doped SiC-MoSi 2 ceramics were successfully fabricated by hot pressing in N 2 using Y(NO 3 ) 3 .6 H 2 O as both sintering aids and additional N sources. The impact of Y(NO 3 ) 3 .6 H 2 O content on the densification, electrical properties, and infrared emission performance of the resulting ceramics were investigated. The distribution of Y-based sintering aid is improved by melting of Y(NO 3 ) 3 .6 H 2 O during slurry drying, enabling the relative density to increase up to 97.4%. Y(NO 3 ) 3 .6 H 2 O subsequently decomposes during sintering and allows the substitution of atomic N for the C sites in SiC lattice and production of the N-derived donor level. A larger amount of N dopant elevates the carrier density up to 1.90 × 10 16 cm -3 . Remarkably, The SiC − 10 wt% MoSi 2 ceramics sintered with 16.9 wt% Y(NO 3 ) 3 .6 H 2 O exhibits the lowest electrical resistivity (0.791 Ω·cm at room temperature) and highest infrared emissivity (0.913 at 800 ℃), the latter of which may also be attributed to lattice distortion induced by N doping . This work demonstrates N doping as a prospective strategy for synergistically optimizing the electrical conduction and infrared emission performance of SiC-based ceramics for infrared source applications.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 38
·13509-13519
·
IF 7.393
Shaohong Chen,Xichao Dong,Xiaoji Yao,Pengfei Wu,Anhua Liu,Zhaoju Yu
Improving the electromagnetic wave (EMW) absorption performance of continuous SiC fibers is of great significance for the development of structure-function integrated composites. Doping magnetic metal elements into SiC fibers can effectively improve their dielectric/magnetic loss, which is expected to produce SiC fibers with wide frequency EMW absorption. At present, introducing metal into continuous SiC fibers generally has the disadvantages of (1) low metal content and (2) weak EMW absorption ability. In this paper, vinylferrocene (VF) with monofunctional groups was selected as the iron source to introduce Fe atoms into polycarbosilane (PCS) through chemical modification without changes in the molecular framework of PCS, which is beneficial for the melt spinning of the precursors. A series of continuous Fe-SiC fibers were prepared by polymer-derived ceramic approach, and their composition, structure and EMW properties were systematically studied. Besides SiC crystallization, the turbostratic carbon, core–shell structures of Fe5Si3@C and Fe3Si@C were identified for the continuous Fe-SiC fibers. It is worth noting that in the present work, (1) the introduction of Fe catalyzes the formation of turbostratic carbon, which can be observed at a low temperature of 900 °C and (2) the highest Fe content (7.70 wt%) was obtained among all the reported continuous Fe-SiC fibers. The unique microstructure of final Fe-SiC fibers demonstrated outstanding EMW absorbing performance. For the Fe-SiC-2-900 °C fiber, the minimum reflection loss (RLmin) reached −54.63 dB at 10.2 GHz. By adjusting the thickness, the effective absorption bandwidth of Fe-SiC-3-1200 °C can almost cover the X-band. The results indicate that the presented continuous Fe-SiC fibers exhibit excellent EMW absorbing performance.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Tao Feng,Wanbo Hou,Mingde Tong,Hejun Li,Hongjiao Lin,Shifeng Wen
SiC nanowires (SiC nws ) modified SiC f /HfC-SiC composites were prepared by precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI) methods. The microstructure, flexural strengths, impact and impact-ablation tests of the composites with and without SiC nws were investigated. The results showed that after introducing SiC nws , not only the retention rate of HfC ceramic produced by PIP was increased obviously, but also the fracture displacement of the modified composites was reduced due to the enhancement effect of SiC nws at interface between SiC fiber and matrix. After impact and impact-ablation, the strength retention of SiC nws modified composites was 91.6 % and 69.1 % respectively, higher than that of the composites without SiC nws (85.2 % and 54.8 %). As the impact resistance of the modified composites was improved by the pull-out and bridging of SiC nws , the ablation resistance of the impacted composites was enhanced as well.
✓ 已验证
DOI
高影响因子
Advances in Applied Ceramics
·
2019
·
IF 1.429
Guangyuan Yang,Sanwen Peng,Zheming Li,Zhixiong Huang
Carbon fibres (CF) have been used in various fields because of their unique properties. However, the oxidation resistance ability of CF is not good enough. The paper discusses the issue of using composite plating method to deposit SiC–MoSi2–ZrO2 coating at the surface of CF. The plating factors, including nanoparticle concentration, plating bath temperature, current density, agitation rate and electroplating time, which affect the structure and performance of coating have been discussed. The energy dispersive spectrometer has been applied to test the mass fraction of nanoparticles in the coating. Also, the surface morphology of coated CF has been characterised by a scanning electron microscope and the antioxidation ability of each sample has been tested by the weight difference method. The results indicate that with the proper plating factors, the coating can improve the antioxidation performance of CF and its reinforced composites. The residual weight of coated CF is over 52% after 1400°C oxidation for 15 min.
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Kai Yuan,Yiqing Zeng,Jinxin Gan,Zhaoxiang Zhong,Weihong Xing
Catalytic membranes can achieve the simultaneous purification of particulate matter (PM) and gaseous pollutants, and their performance depends on the design of a catalyst and its combination with a membrane material. Herein, a novel Pt@CNTs/SiC catalytic membrane composed of a Pt@CNTs (carbon nanotubes) membrane layer and a porous SiC support was developed for the simultaneous removal of formaldehyde and PM at room temperature. The CNT membrane layer underwent vertically integrated growth on a porous SiC support, which provided the catalytic membrane with a pore size of 7.4 μm and a high gas permeance of 240.2 m3·m–2·h–1·kPa–1. The loading of Pt particles on CNTs slightly decreased the gas permeance of the catalytic membrane (219.9 m3·m–2·h–1·kPa–1) but endowed the membrane with catalytic formaldehyde degradation performance. The obtained Pt@CNTs/SiC catalytic membrane with a 240 μm thick CNT layer and 0.8% Pt loading exhibited 99.999% filtration efficiency for 300 nm SiO2 (face velocity = 1 m/min) and 72.1% formaldehyde degradation (gas flow = 49 mL/min), implying that the Pt@CNTs/SiC membrane has good application potential in the collaborative removal of various air pollutants.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shen-wei Bai,Hui Mei,Zhi-peng Jin,Shan-shan Xiao,Lai-fei Cheng
In this article, we for the first time synthesized a series of SiC@Zn 0.5 Cd 0.5 S core-shell Z-scheme nanostructure, with the thickness of the shell varies from 12 nm to 60 nm, and the excellent photocatalytic exists because of the Z-scheme heterojunction mechanism. The Z-scheme system of SiC@Zn 0.5 Cd 0.5 S core-shell structure was proven by the in situ irradiated X-ray photoelectron spectroscopy, the system separated the photo-generated electron-hole pairs, and the core-shell structure performed better photocatalytic properties than Zn 0.5 Cd 0.5 S on the hydrogen production under UV–vis light irradiation. With decreasing of the shell thickness, the transient photocurrent response of the SiC@Zn 0.5 Cd 0.5 S increased and the photoluminescence decreased, anticipating the creation, collection, transportation of electrons/holes increased, and the electrons/holes recombination suppressed. The hydrogen production rate enhanced to 334% comparing with pure Zn 0.5 Cd 0.5 S, showing the advantage of SiC@Zn 0.5 Cd 0.5 S core-shell Z-scheme heterojunction nanostructure.
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 35
·期 6
·1031-1037
·
IF 0.957
Cao Yaoqin,He Qianglong,Wang Weimin
B 4 C-TiB 2 -SiC composites with excellent properties were prepared by reactive hot-pressing using B 4 C, TiC, and Si powders as the raw materials. The phase transition process was investigated by heating the powder mixture to different temperatures and combined with XRD tests. TiB 2 and SiC phases were synthesized through an in situ reaction, and the mechanical and thermal properties were improved simultaneously. Microstructure and mechanical properties were also studied, and the 60wt% B 4 C-21.6wt% TiB 2 -18.4wt% SiC composite showed a relative density of 99.1%, Vickers hardness of 34.6 GPa, flexural strength of 582 MPa, and fracture toughness of 5.08 MPa·m 1/2 . In addition, the values of thermal conductivity and thermal expansion coefficient were investigated, respectively.
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Yanxi Qin,Rongyu Li,Wei Mi,Wei Shi,Baoying Lu,Xili Tong
Aqueous catalytic phenol has been explored using Pd 7 P 3 /SiC catalysts in the presence of H 2 . Palladium phosphide was prepared by oleoamine reduction and supported on silicon carbide. The physicochemical properties of the catalyst were characterized by inductively Coupled Plasma Emission Spectrometer (ICP-MS), X-ray diffractometer (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results show that palladium phosphide is successfully supported on silicon carbide, and the dispersion is relatively uniform with the particle size is about 6–9 nm. Under the same catalytic conditions, a catalyst with a loading of 2.4 wt% exhibits the best activity. When the temperature is 40 °C, the initial pressure is 5 bar, the conversion of phenol can reach more than 99%, and the selectivity of cyclohexanol reaches 94% after 2 h reaction.
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2023
·Vol. 20
·期 6
·3635-3646
·
IF 2.1
Haopeng Cai,Yinglong Wei,Baoguo Wang,Kun Jiang
It is necessary to give self-healing function to ceramic materials because of their notch sensitivity. In the past, studies on self-healing ceramics have mainly focused on the high-temperature stage, and less research has been done below 1000°C. In this study, SiC/Al 2 O 3 /TiB 2 ceramic composites were prepared by spark plasma discharge sintering, and cracks were introduced on the surface of the polished specimens. Crack healing at 600°C–800°C was investigated, and the recovery of macroscopic bending strength and the change of microscopic crack morphology after heat treatment were used to evaluate the crack-healing effect. It was found that the surface cracks of the material were completely filled and healed by oxidation products after heat treatment at 700°C for 60 min, and the highest healing efficiency exceeded 95% for both specimens with different crack lengths, and the main mechanism of crack by Si-Al-B-Na-Ca-O type glass produced by the reaction of TiB2 and a small amount of SiC with oxygen to produce oxides and glass powder. Good healing effect and fast healing speed effectively improve the service life and reliability of ceramic materials, which has very far-reaching significance for the practical application with ceramic materials.
✓ 已验证
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Runchao Dong,Hulin Wang,Jia Zhang,Hongxin Yin,Genqiang Liu,Bartosz Orwat,Beata Luszczynska,Weijun Li,Dongdong Zhang,Huan He,Zhentao Du,Shanliang Chen,Weiyou Yang
Manipulating the interfacial and surface carrier dynamics within nanostructured semiconductors is pivotal for advancing the electrical and optical performances of photoelectrochemical (PEC) photodetectors (PDs), particularly for durable underwater optical communication systems. Herein, a highly responsive and robust self-powered PEC UV PDs based on SiC/Au heterojunction nanoarrays is explored, by leveraging the synergistic effect from localized surface plasmon resonance (LSPR) of Au nanoparticles (NPs), heterojunction interfacial engineering, integrated self-supporting photoelectrode architecture, 1D nanoarray benefits, and inherent chemical stability of SiC. SiC nanowire (NW) arrays are fabricated via anodic oxidation and subsequently decorated with tailored densities of Au NPs using controlled sputtering. The as-assembled SiC-based PEC PDs demonstrate exceptional UV (375 nm) photodetection behaviors with rapid response ( τ r / τ d , 86.5/170.95 ms), high responsivity ( R λ , 1244.95 mA W −1 ), excellent detectivity ( D * , 6.35 × 10 11 Jones), and remarkable external quantum efficiency ( EQE , 412.45%). Moreover, they exhibit broad pH tolerance and excellent long-term stability against full aquatic environments. This work provides a strategic approach for designing high-performance self-powered PEC PDs for reliable underwater optical communication, such as liquid environmental monitoring, ocean exploration, and biomedical detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2026
·
IF 3.6
Mingliang Hu,Xinyue Zhang,Mengke Liu,Zihao Liu,Jiaxin Zhang,Keqiang Cheng,Li Guan,Yanqiu Zhu,Rui Zhang
This article reports a microwave-assisted technique using an innovative layered precursor for the synthesis of layered silicon carbide (SiC), its formation mechanism and electromagnetic wave (EMW) absorption properties. The layered precursor with alternating “silicon-carbon” layers, by utilizing flake graphite and a Si/SiO 2 powder mixture as the carbon and silicon sources, respectively. The selective heating nature of microwaves enabled the precise control over an internal temperature gradient within the material. The influence of the C/Si molar ratio (varied as 1:1,1.5:1, 2:1, 2.5:1, and 3:1) on the microstructure and the EMW absorption properties of the resulting SiC was systematically studied. The product was identified as β -SiC, exhibiting a distinct layered structure with abundant interlayer porosities. An optimal EMW absorption was achieved at a C/Si = 2:1. A 1.7 mm thick film showed a minimum reflection loss (RLmin) of −42.15 dB at 16.38 GHz, with an effective absorption bandwidth (EABmax) of 6.21 GHz (11.79–18 GHz), which fully covers the entire Ku-band. This superb performance has been attributed to the unique hierarchical porous architecture, which facilitates efficient EMW absorption through optimized impedance matching and enhanced attenuation via multiple loss mechanisms. This work provides a novel strategy for synthesizing high-performance SiC-based EMW absorbers.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 6.7
Xingyu Xia,Chuhan Zhou,Siying Li,Siyu Jian,Siyu Li,Xingyu Sun,Yiting Xiao,Dan Qian,Fan Yang,Lina Wang,Xiaole Tao,Xuehui Gao,Wenjun Yan,Meiqiang Fan,Lijing Yan,Yan Lu,Shangfu Liao,Min Ling,Bin Wang,Chengdu Liang
Silicon-based anodes are expected to significantly enhance the energy density of lithium-ion batteries due to their high theoretical capacity. However, repeated fragmentation and reconstruction of the SEI layer, driven by substantial mechanical stress, have considerably constrained its practical application. To dissipate the substantial mechanical stress, we introduce a flexible lamellar material (g-C 3 N 4 ). The flexible g-C 3 N 4 effectively dissipates the substantial mechanical stress induced by significant volume expansion between SiC particles, thereby significantly improving the mechanical strength of the SiC electrode, maintaining its structure, and promoting the formation of a mechanically robust, highly ion-conductive SEI layer. AFM test demonstrates that the introduction of g-C 3 N 4 effectively dissipates the substantial mechanical stress. Specifically, compared to the SiC electrode (8.8 keV), the SiC@5 % g-C 3 N 4 electrode (4.0 keV) exhibits considerably lower energy dissipation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）