CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Shiquan Sui,Yuting Ma,Shuo Sun,Xiaoyu Wang,Qingbo Meng,Shuang Li,Yang Zhao
The development of additive manufacturing technique provides possibility to prepare SiC ceramics with complex shapes. However, defect control in the debinding and sintering stages is still a great challenge for the vat photopolymerized components. Here, SiC ceramics were manufactured by vat photopolymerization followed by liquid silicon infiltration, using SiC whiskers as the reinforcement. In the debinding stage, the SiC whiskers prevented the propagation of micro-cracks that induced by the formation and emission of gaseous substance. Also, the SiC whiskers provided channels for the infiltration of liquid silicon during sintering, thus the bulk density of the as-sintered SiC w /RBSC composite reached 2.95 g/cm 3 at the whiskers fraction of 8 wt%. Because of the various toughening mechanisms introduced by SiC whisker, the flexural strength and Vickers hardness of the composite increased up to 352.2 MPa and 17.54 GPa, respectively. Thus, this work provides a new strategy to control micro-defects in vat photopolymerized SiC ceramics.
研究领域:
材料科学
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2022
·
IF 3.752
Zhong-ya PANG,Xiang LI,Xue-qiang ZHANG,Jin-jian LI,Shu-juan WANG,Xiao-lu XIONG,Guang-shi LI,Qian XU,Zhong-fu ZHOU,Xing-li ZOU,Xiong-gang LU
A one-step molten salt electrochemical strategy was proposed to synthesize SiC nanoparticles from ultra-fine silicon dioxide/carbon (SiO 2 /C) mixtures. The electrosynthesis process and physicochemical properties of the synthesized products were systematically analyzed via X-ray diffraction, electron microscopy, Raman spectroscopy and photoluminescence spectroscopy, etc. A combined chemical/electrochemical reaction, electrochemical deoxidation, and in-situ carbonization reaction mechanism was proposed to reveal the electrochemical synthesis process of SiC nanoparticles from SiO 2 /C in molten CaCl 2 . The as-prepared SiC with particle size ranging from 8 to 14 nm possesses a polycrystalline structure. In addition, the SiC nanoparticles demonstrate obvious photoluminescence property due to the synergetic size effect and microstructural characteristics.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xin Fang,Wen Huang,Tangqi Hu,Wei Liu,Yonggang Yang,Qi-Hui Wu,Yi Li
Solid-state lithium-ion batteries (SSLIBs) are considered as the coming generation of high energy density batteries. To eliminate the “shuttle effect” and improve the interfacial properties between solid-state electrolyte and anode electrode in SSLIBs, a strategy of integrating anode and quasi-solid-state electrolyte is proposed in current study. Using silica coated electro-spun polyacrylonitrile (PAN) nanofiber film as the starting material, a self-standing Si/SiC/C nanofiber composite film (SNF) was obtained after magnesiothermic reduction, which was then applied as anode as well as electro-spun PAN nanofiber collector. An integrated anode@electrolyte membrane (SNF@PAN-E) was finally achieved by showing extremely low interfacial resistance down to 8.6 Ω after 100 cycles at room temperature. Moreover, mesoporous silica nanofibers were incorporated into the electro-spun PAN to make quasi-solid-state PANS-15-E electrolyte membrane, improving its ionic conductivity up to 8.0 mS cm −1 with Li ions migration number of 0.76 and the electrochemical window of 5.1 V. Electrochemical tests indicated that, the assembled SNF@PAN-E|Li and SNF@PANS-15-E|Li batteries showed excellent cycling stability and rating performance as prospected. Especially, the assembled SNF@PANS-15-E|LFP full battery also exhibited a capacity over 90 mAh g −1 after 580 cycles at a high current density of 5.9C without using the anode current collector, proving the applicability of this integrated anode@electrolyte membrane, and indicating an economic and effective strategy for producing new SSLIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2025
·Vol. 15
·期 4
·376
·
IF 2.8
Piye Wu,Jingjie Hu,Chanyu Liu,Ping He,Feng You,Hao Yang,Man Xu
Unsaturated polyester (UP) resin is widely utilized in the construction and automotive industries. The flammable nature of UP must be constrained when its products are manufactured. A novel organic flame retardant has been synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and triallyl isocyanate (TAIC). This DOPO-TAIC additive has been used to reduce the flammability of a matrix. Additionally, this flame retardant was then combined with dopamine-modified silicon carbide (M-SiC) to further diminish the flammability of UP. The limiting oxygen index (LOI) value combustion of a UP/DOPO-TAIC/M-SiC blend was 30.8% when the filler contents of DOPO-TAIC and M-SiC was 15 wt.% and 30 wt.%, respectively. These materials exhibited a UL 94 V-0 rating for combustion. Compared to the values for combustion of the neat UP, the peak heat release rate (Pk-HRR) and total heat release rate (THR) for this blend were reduced by 51% and 35%, respectively. The mode of action for flame retardant of UP blends containing DOPO-TAIC and M-SiC has been composed. The presence of a flame retardant containing P-Si elements can significantly reduce flammability compared to that of unmodified resin.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yuliang Jiang,Zhaoyin Wang,Zhihui Dai
A novel nanocomposite, silicon–carbon-based dots@dopamine (Si-CDs@DA) was prepared using (3-aminopropyl) triethoxysilane, glycerol, and dopamine as raw materials via a rapid microwave-assisted irradiation. This type of Si-CDs@DA exhibited ultrabright fluorescence emission (quantum yield of 12.4%) and could response to Ag+ selectively and sensitively. Moreover, the obtained Si-CDs@DA can be further applied in sensing intracellular Ag+ and cell imaging, because of its photostability, salt stability, and low cytotoxicity. This study provides a simple and efficient approach for preparing novel Ag+ fluorescent probes, which could expand the application of carbon nanomaterials in designing related biosensors.
研究领域:
纳米材料
·
生物传感
·
细胞生物学
✓ 已验证
DOI
PubMed
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.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Chenxi GAO,Jian CHEN,Changcong HUANG,Shengjun LIAO,Lan PENG,Zhengren HUANG
In this study, high-strength dense silicon carbide ceramics were successfully prepared via material extrusion 3D printing in combination with pressureless solid-state sintering, in which a polyethylene/wax synergistic binder system was applied to material extrusion 3D printing. Samples of different binder components were prepared by adjusting the ratios of high-density polyethylene (HDPE), low-density polyethylene (LDPE), and paraffin wax (PW). Owing to the good synergy between HDPE/LDPE and PW, a uniform polymer skeleton network was formed in the HL21P sample, demonstrating the best rheological properties and printing quality. After sintering, the HL21P sample possessed the highest density of 3.06 g/cm 3 and the lowest open porosity of 0.4%, along with an optimal flexural strength of 397±29 MPa and elastic modulus of 345±29 GPa. Additionally, the optimal composition HL21P sample still possesses a flexural strength of 382 MPa after sintering at 1700°C. This research addresses the high-temperature failure of SiC ceramics fabricated via the prevalent reaction sintering method in the field of 3D-printed SiC ceramics, attributed to the presence of free silicon. It also demonstrates the importance of polyethylene and paraffin synergy in forming a polymeric skeletal network, enabling the production of SiC ceramics through 3D printing and pressureless sintering.
研究领域:
材料科学
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Junwei Feng,Xuanting Wu,Said Amzil,Min Li,Xingchen Liu,Ming Yang,Tingting Yan,Peter Müller-Buschbaum,Ya-Jun Cheng,Jie Gao,Yonggao Xia
Silicon–carbon (Si/C) composites hold great promise as substitutes for conventional graphite anodes in high-specific-energy lithium-ion batteries (LIBs). However, their performance is hindered by silicon’s substantial volume expansion during cycling, which can lead to electrode degradation. Traditional poly(acrylic acid) (PAA) binders often struggle to maintain electrode integrity under these conditions. To address this challenge, polyether modified polyurethane acrylic (PUMA) is used as physicochemical cocrosslinking polymer. PUMA offers superior mechanical properties, elasticity, and interfacial stability, enabling it to effectively accommodate silicon’s volume changes and prevent electrode fracture. Through a simple preparation process, we used PUMA as a slurry additive in combination with PAA to form a functional composite binder, facilitating the construction of a stable and robust SEI film. This is conducive to alleviating the volume expansion of silicon and ensuring the cycling stability of the electrode. In Si/C450 half-cells, electrodes enhanced by our binder show a remarkable longevity, maintaining 97.26% of their capacity post 200 cycles at 0.5 C. The full cells Si/C450||NCM811 display a notable performance, achieving a capacity retention of 82.10% after 100 cycles at 0.2 C. These findings underscore the potential of our innovative binder design in enhancing the efficacy of silicon-based anodes in high-energy LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS LETTERS
·
2024
·Vol. 124
·期 24
·
IF 3.5
Chen Wenkang,Wu Xiangshui,Deng Shichen,Yang Nuo,Xu Xiangfan
Strain provides an additional mechanism in tuning the thermal/electrical properties of nanostructures and therefore has triggered lots of interest in recent years. However, experimental research about the strain effect on the thermal conductivity of nanowires is still limited, especially in the low-temperature range, which is important in understanding the physics of strain-induced regulation in thermal conductivity. Here, we present thermal transport measurements of bent silicon carbide nanowires at temperatures ranging from 20 to 300 K. Reduction in thermal conductivity compared to their straight counterparts is observed. More specifically, the relative change is up to 55% at 20 K and descends with temperature, which is due to the inhomogeneous strain-induced phonon scattering. This study will deepen the understanding of thermal properties in nanostructures with strain.
CAS / MDL:
研究领域:
材料科学
·
热物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Liang-Jun Yin,Chao Cai,Hui Wang,Yu-Jie Zhao,Hao Van Bui,Xian Jian,Hui Tang,Xin Wang,Long-Jiang Deng,Xin Xu,Ming-Hsien Lee
Superior thermal quenching and degradation of phosphors are required for long lifetime lighting devices, such as light-emitting diodes, which can be realized through composition modification. Here, Al-N bonds in AlON: Eu 2+ phosphors are substituted by higher bond order of Si-C. Photoluminescence (PL) results show thermal quenching (at 150 °C) and thermal degradation (after 600 °C treatment in air) are improved by 5% and 8% with a small decrease of PL intensity in 5% SiC doped AlON: Eu 2+ phosphor. To explain these observations, first-principles computational study was performed to understand the Si and C configuration in AlON:Eu 2+ . The calculations reveal that Si and C elements are not randomly distributed in AlON lattice. It was found that Si prefers occupying tetrahedral sites (Td-Si) and the insertion of C in Td-Si is always energetically favorable, which results in the formation of SiC 4 and SiNC 3 clusters. Thus, the Al-N substitution by Si-C induces a stronger local structure, which accounts for the emission redshift and better thermal stability.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Da Pang,Wei Weng,Jing Zhou,Dong Gu,Wei Xiao
Direct conversion of biomass to functional materials is an ideal solution to relieve challenges in environmental and energy sustainability. We herein demonstrate a molten salt thermoelectrolysis of rice husks (RHs) mainly consisting of organic mass and biosilica to achieve high-efficiency and upgraded utilization of both Si and C in RHs. By coupling pyrolysis of organic mass with electrochemical reduction of silica in molten salts, the thermoelectrolysis of RHs in molten CaCl 2 –NaCl at 800 °C refines the RHs and acid-leached RHs to SiC nanowire/C (SiC-NW/C) and Si nanoparticle/C (Si-NP/C), respectively. The present study highlights the molten salt thermoelectrolysis for reclamation of biomass wastes in an affordable and controllable manner.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2020
·
IF 2.906
Han Wu,Siqi Shen,Jun Li,Xiaohong Chen,Zhejuan Zhang,Wei Ou-Yang
Boosted field emission (FE) cathodes of silicon carbide nanowires (SiC NWs) filled with polyaniline (PANI) and polypyrrole (PPY) coatings were prepared via cyclic voltammetry method, which is facile, feasible and capable to control the coating-thickness. As compared to pristine SiC, the average turn-on field ( E on ) of SiC/PANI and SiC/PPY under several of repeat experiment decreased from 1.84 to 1.44 and 1.04 V/μm, respectively. The lowest E on of SiC/PPY even dropped down to 0.95 V/μm with raised field enhancement-factor and conductivity, identifying that the FE properties have been improved by depositing PANI and PPY due to enhanced conductivity. However, the conductivity would be saturated with the continuously increasing depositing-thickness and overly thick coatings would block the efficient FE points and reduce the effective electric field between cathode and anode, causing a worse FE performance instead. Besides, the optimal FE performance was obtained in SiC/PPY, which not only had a much lower E on , but also reinforced the stability. The synergy of conductivity effect and thickness effect found in this study indicates SiC/PPY to be a promising candidate for FE applications in vacuum electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）