CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Hanqin Liang,Kaihui Zuo,Yongfeng Xia,Dongxu Yao,Jinwei Yin,Yuping Zeng
Lu-Al-Si-O-N tapes with different thickness were used to join gas pressure sintered Si 3 N 4 ceramics. The microstructure of the joints and the influences of the joint thickness and joining temperature on the bonding strength of the as-joined Si 3 N 4 ceramics have been investigated. The highest bonding strength about ~ 300 MPa of the joined specimens was achieved by using 450 µm interlayer at 1450 °C. The existence of Si 3 N 4 nanowires was beneficial for the improvement of the bonding strength by interweaving the oxynitride glass matrix in the joint region.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 4
·1027-1040
·
IF 5.6
Ke Gao,Xianglei Liu,Qi Wang,Zhixing Jiang,Cheng Tian,Nan Sun,Yimin Xuan
Solar thermochemical CO2 splitting has emerged as a promising strategy for solar fuel production to alleviate climate change challenges and reduce the energy crisis. However, traditional redox materials still suffer from low CO production, poor cycle stability, high operating temperature, and large temperature swing, leading to low solar-to-fuel efficiency. Herein, Ce- and Al-doped SrMnO3 perovskites are proposed for high-performance solar thermochemical CO2 splitting within moderate temperature swing (1350/1100 °C). Sr0.6Ce0.4Mn0.8Al0.2O3 demonstrates a remarkable CO yield of 799.34 μmol g−1, which is ∼6.67 times as high as that of benchmark CeO2. Fast CO2 splitting kinetics of SCMA20 is demonstrated by the CO peak production rate enhanced by 142% compared with undoped SrMnO3. The proposed Sr0.6Ce0.4Mn0.8Al0.2O3 also exhibits excellent stability with no obvious deactivation or degradation over multiple cycles. The ultrahigh CO yield can be attributed to lower oxygen vacancy formation (3.65 eV) and migration energy (2.14 eV) as confirmed by DFT calculations, and the transformation of the first-order reaction (F1) to the second-order reaction (F2) compared to SrMnO3. This work provides a new path for high-performance solar thermochemical CO2 splitting with high CO production, fast reaction kinetics, good cycling stability, moderate temperature swing, and high solar absorptance.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2017
·Vol. 25
·期 20
·A932
·
IF 3.307
Fan Yang,Xiaoli Kang,Jiangshan Luo,Laixi Sun,Handing Xia,Zao Yi,Yongjian Tang
We report the first laser emission from flash ignition of Zr/Al nanoparticles with the addition of strong oxidizer KClO4 using Nd: YAG as a laser medium. The mixture Zr/Al/Kp-45 (mass ratio = 33%Zr: 33%Al: 34%KClO4) has the highest brightness temperature Tb = 4615 K and the adiabatic flame temperature Tf = 4194 K with the duration of 20 ms. At 1064 nm we measured a maximum output energy of 702.5 mJ with the duration of nearly 10 ms by using only 100 mg mixture with an output coupler (transmission T = 10%). Further optimizing the concentration cavity and increasing the mixture content will yield much higher efficiency and output energy.
研究领域:
材料科学
·
光学
·
激光物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chang Zhou,Yongxiao Zhou,Saiyue Liu,Lianyu Zhang,Peiyu Song,Qiang Zhang,Biyuan Ma,Gaohui Wu
Negative thermal expansion particles can compensate metal matrix composites to achieve near-zero thermal expansion materials. However, there are huge thermal residual mismatch stresses in the particles due to the thermal expansion mismatch between matrix and reinforcement. The use of hybrid reinforcement is required to solve the stress concentration problem. In this study, the hybrid Al matrix composites reinforced with ZrW 2 O 8 and SiC reinforcements (SiCp, SiCnw) were fabricated by the pressure infiltration process. The effect of SiC content on microstructure, phase composition, thermal expansion and mechanical properties were examined by a combination of XRD , SEM, thermal dilatometer and bending tests. The results showed that the high-pressure phase (γ-ZrW2O8) content of hybrid metal matrix composites decreased with increasing SiC fraction. Among them, the composites containing 61.7 vol%ZrW 2 O 8 and 3.3vol%SiCnw achieved the best performance with a bending strength of 100–150 MPa and a near-zero thermal expansion (2.0–3.0 ×10 –6 K −1 ) in a wide range of − 50–120 °C, which was attributed to the synergetic hybrid effects of SiCnw and ZrW 2 O 8 . This work opens up a new frontier for the design and preparation of lightweight zero-thermal expansion materials.
研究领域:
材料科学
·
力学
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产品关联
DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-10
·
IF 5.228
Zheng Guoqiang,Zhang Wenchao,Shen Ruiqi,Ye Jiahai,Qin Zhichun,Chao Yimin
Mn 2 O 3 has been selected to realize nanothermite membrane for the first time in the literature. Mn 2 O 3 /Al nanothermite has been synthesized by magnetron sputtering a layer of Al film onto three-dimensionally ordered macroporous (3DOM) Mn 2 O 3 skeleton. The energy release is significantly enhanced owing to the unusual 3DOM structure, which ensures Al and Mn 2 O 3 to integrate compactly in nanoscale and greatly increase effective contact area. The morphology and DSC curve of the nanothermite membrane have been investigated at various aluminizing times. At the optimized aluminizing time of 30 min, energy release reaches a maximum of 2.09 kJ∙g −1 , where the Al layer thickness plays a decisive role in the total energy release. This method possesses advantages of high compatibility with MEMS and can be applied to other nanothermite systems easily, which will make great contribution to little-known nanothermite research.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yichao Gong,Junjie Li,Shenghui Yang,Mao Yang,Hao Dang,Yingying Ren,Guojun Zhang,Tiecheng Lu
Investigations on the doping modification of tritium breeding materials have been becoming one of the interesting research areas in the past few years. Recently, preparation method, mechanical and physical properties and tritium release behavior of Li 4+x Si 1-x Al x O 4 solid solution have been studied because of its potential advantages in the field of tritium breeding materials. In this paper, a facile approach was proposed to prepare Li 4+x Si 1-x Al x O 4 pebbles with a relatively small grain. TG/DSC and XRD were conducted to investigate the formation process of Li 4+x Si 1-x Al x O 4 . The results showed the crushing strength and thermal conductivity were obviously improved by introduction of hetero-element Al into Li 4 SiO 4 , and the optimal x value for Li 4+x Si 1-x Al x O 4 was 0.2 from the point of high crushing strength and thermal conductivity. This study will be expected to provide references for fabricating other solid solution tritium breeders.
研究领域:
核能科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Ying Wang,Tengfei He,Jingguo Cao,Ke Li,Chengqian Wang,Qun Liu,Yu Zhang
This study demonstrates a sustainable strategy for synthesizing MIL-53(Al) and ZSM-5 zeolite through dual-waste synergy using coal fly ash (CFA) and waste polyethylene terephthalate (PET). A sequential alkaline fusion-acid leaching protocol selectively fractionated CFA into aluminum-rich solutions and silica residues, while alkaline hydrolysis of PET liberated terephthalic acid (PTA) as organic ligands. The Al 3+ -PTA coordination under solvothermal conditions produced MIL-53(Al)(CFA-PET) exhibiting well-defined 1D rhombic channels with a high BET surface area (1303 m 2 ·g −1 ), whereas hydrothermal crystallization of silica residues yielded ZSM-5(CFA), which formed spherical aggregates composed of 100 nm nanosheets with 89.9 % yield and a surface area of 311 m 2 ·g −1 . Structural advantages were evidenced by exceptional adsorption performance: MIL-53(Al)(CFA-PET) achieved 96.24 % methylene blue removal at pH 7 (250 mg·L −1 ), outperforming rhodamine B (30.8 %) and methyl orange (66.4 %), as well as reagent-synthesized MIL-53(Al) Che (91.99 %). Both materials demonstrated exceptional CO 2 capture capacities (4.23 mmol·g −1 for MIL-53(Al)(CFA-PET) vs. 2.37 mmol·g −1 for ZSM-5(CFA) at 273 K/1 bar), attributable to MIL-53′s flexible framework enabling dynamic pore adjustment and ZSM-5′s rigid microporous channels favoring molecular sieving. This work establishes a closed-loop strategy for converting industrial and plastic wastes into functionally differentiated porous materials through element-targeted process design.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xin-Ru Chen,Heng Mao,Qiu-Ying Zhang,Wei-Min Liu,Shen-Hui Li,Qian-Qian Li,Li-Hao Xu,Yan-Mei Zhang,Xin-Yue Zhang,Jun-Jie Liu,Ao Kou,Zhi-Ping Zhao
Interfacial engineering in mixed matrix membranes (MMMs) is essential to attain superior separation performance and ensure long-term operational stability. In this research, a range of novel MMMs were designed and fabricated for pervaporation (PV) separation of n-butanol/water solution by introducing the MIL-53(Al) particles and three variants (i.e., MIL-53(Al)–NH 2 , MIL-53(Al)–NO 2 , MIL-53(Al)–OH) into PEBA polymer matrix. These four MIL-53(Al) counterparts were synthesized via a microwave-assisted solvothermal method by selectively functionalizing the terephthalic acid linkers with different chemical groups. The functional MIL-53(Al) variants were employed to explore the relationship between membrane microstructures and PV performance by manipulating the interfacial interactions with PEBA matrix. The findings reveal that incorporating MIL-53(Al) variants not only displayed excellent interfacial compatibility and uniform dispersion within PEBA matrix, but also constructed the preferential transport pathways for n-butanol over water molecules. Impressively, in a 1 wt% n-butanol aqueous solution at 40 °C, the resultant membrane attained a permeation flux of 1483.3 g·m -2 ·h -1 and a separation factor of 18.1. Compared to the PEBA/PVDF membrane, the total flux was enhanced by 17.1 %, and the separation factor was improved by 46.4 %. Moreover, the embedding MIL-53(Al) variants boosted thermal and mechanical properties of the membrane, endowing it with considerable potential for practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 76
·40352-40358
·
IF 3.708
Xing Li,Yong-De Yan,Mi-Lin Zhang,Yun Xue,Hao Tang,De-Bin Ji,Zhi-Jian Zhang
The electrochemical reduction of Nd(III) was investigated on an inert W and a liquid Al electrode in molten NaCl–KCl eutectic salt. On both W and liquid Al electrodes, the reduction of Nd(III) ions to Nd(0) metal occurred in a single reaction step, which avoids the corrosion reaction: 2Nd(III) + Nd → 3Nd(II). Therefore, corrosion of Nd metal in this molten chloride media is not expected. The co-reduction behavior of Nd(III) and Al(III) ions was studied on a W electrode in NaCl–KCl–AlCl3–NdCl3 melts. Five kinds of Al–Nd intermetallic compound were detected via cyclic voltammetry and open circuit chronopotentiometry. Intermittent galvanostatic electrolysis was employed on liquid Al electrodes to extract Nd in the form of Al–Nd alloys in NaCl–KCl–NdCl3 melts. Nd, AlNd3, Al2Nd, and AlNd phases were identified by X-ray diffraction (XRD). With the increase of electrolytic time, the content of Nd-rich Al–Nd intermetallic compounds in the Al–Nd alloy increased. The morphology and micro-zone chemical analysis of the deposits were characterized by a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), and the Al11Nd3 phase was confirmed by EDS analysis.
研究领域:
冶金学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1246
·
IF 3.4
Wenjuan Qi,Desheng Ding,Weijie Luo,Weiliang Jin,Qian Kou,Chuntao Ge,Saijun Xiao
The hardness and wear resistance of amorphous Al–Mn alloy coatings can be improved by incorporating ceramic particles into them to extend their application. In this paper, Al–Mn/WC composite coatings have been prepared with electrodeposition in stirred AlCl3–NaCl–KCl–MnCl2molten salts at 180 °C with the addition of WC particles. The effects of stirring speed (400–700 rpm) and cathode current density (15–75 mA/cm2) on the produced Al–Mn/WC composite coatings have been studied. At 600 rpm and 700 rpm, the Al–Mn/WC composite coatings exhibited the best uniform distribution of the embedded WC particles, with the tested microhardness value up to 650 HV0.1, compared with 530 HV0.1of the Al–Mn alloy. Moreover, under various cathode current densities, the best quality of the Al–Mn/WC composite coating was obtained at 55 mA/cm2, with a homogeneous distribution of WC particles and the highest microhardness value (670 HV0.1). It is expected that this method could be extended to be applied for the preparation of aluminum-based and magnesium-based ceramic composite coatings.Keywords:AlCl3–NaCl–KCl–MnCl2molten salts;electrodeposition;WC particles;Al–Mn/WC composite coating
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
FirePhysChem
·
2025
·
IF 3.6
Jianhua Hou,Dongmei Ren,Jiarong Duan,Xiaobao Liu,Yongqi Da,Jianbing Xu,Yinghua Ye
Aiming at the problem that the ignition ability of semiconductor bridge (SCB) is limited by the quality of bridge area, an energetic semiconductor bridge (ESCB) was prepared by 3D direct writing printing method. Using Al/CuO as the main component of the energetic ink and nitrocellulost (NC) as the binder, an energetic ignition bridge was successfully prepared by combining the energetic ink on the SCB surface. The electric detonation and ignition experiments of SCB and ESCB were carried out by means of capacitive discharge, and the gap ignition experiments proved that the ignition ability of SCB was successfully enhanced by energetic ink. In the electrical explosion experiment, under the excitation of 30 V capacitor discharge, the melting and vaporization time of ESCB bridge zone is longer than that of SCB, because the energetic film absorbs the heat generated by the bridge zone. Due to the bonding effect of NC, Al and CuO are more closely combined and the reaction is more complete, and the heat release of energetic ink is 1232 J/g. At 30 V/100 µF, the ESCB can ignite the B/KNO 3 charge at an 10 mm gap when the ink charge is 3 mg. The results demonstrate the strong ignition ability of ESCB, which has a good application prospect in the use of ignition and fire transmission sequences.
研究领域:
材料科学
·
电子工程
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Lanting Yang,Zhaokang Chen,Lihao Wang,Zhenwei Zhang,Ruihao Wang,Changping Guo
The high sensitivity of high explosive hexanitrohexaazaisowurtzitane (CL-20) limits its applicability, and the performance optimization brought by the synergistic effect between nanothermite and CL-20 is expected to expand its application prospects. In this study, polydopamine (PDA) was introduced to modify CL-20 (denoted as pCL-20), and a quasi-core/shell pCL-20/polytetrafluoroethylene-aluminum (pCL-20/PTFE-Al) composite was successfully prepared by ultrasonic-assisted composite method. The performance characterization results demonstrate that the composite exhibits significantly better decomposition heat release than the mixed sample, a reduction in combustion time from 408 ms to 268 ms, a more stable combustion flame, and more focused energy release. At the same time, the comparison of composite combustion with different condition variables reflects the combustion advantages of the selected proportional conditions in this study. The characteristic drop height (H 50 ) increased from 24.05 cm to 42.15 cm, the explosive percentage of friction sensitivity reduced from 100 % to 70 %, and the sensitivity of the composite sample decreased significantly when compared to the raw CL-20. It improves the combustion performance while reducing the sensitivity, thereby enhancing the application potential and providing a reference for the high-energy desensitization of energetic materials.
研究领域:
材料科学
·
爆炸物化学
✓ 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）