METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2025
·
IF 3.1
Wang Jingzhi,Fan Shenghong,Li Xin,Wang Hongyang,Han Peiwei,Ye Shufeng
With the rapid advancement of short-process steelmaking technology and the demand for low-carbon emissions, electric arc furnace (EAF) has increasingly become a critical pathway in global steel production. This study systematically investigates the structure–property relationships and compositional regulation mechanisms of CaO–SiO 2 –FeO–MgO–Al 2 O 3 slag, focusing on the effects of high FeO content between 21 and 30 wt pct on viscosity, density, and microstructure. The viscosity and density of the homogeneous slags in the range between 1773 K and 1873 K were measured using the rotating cylinder and Archimedes methods, respectively. The short-range structural characteristics of slag systems with different FeO contents were analyzed by molecular dynamics simulations. The results indicate that as the FeO content increases, the liquidus temperature, viscosity, viscous flow activation energy, and the molar volume decrease accordingly, while the density increases. FeO promotes depolymerization of the aluminosilicate network, leading to an increase in the proportion of non-bridging oxygen and free oxygen and a decrease in bridging oxygen content. The results obtain the correlations between FeO content, network depolymerization, and changes in flow properties, providing a theoretical basis for slag composition optimization and foaming slag control in EAF operations.
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yiming Zhou,Suitao Qi,Bolun Yang,Chunhai Yi
Perhydro-dibenzyltoluene (18H-DBT) possesses a high hydrogen storage capacity and is regarded as a promising liquid organic hydrogen carrier (LOHC). The key to its application lies in long-period dehydrogenation with high conversion and less carbon deposition at a lower temperature. In this work, the WPt/Al2O3 catalyst was synthesized by a sol–gel method combined with a precursor pretreatment method for perhydro-dibenzyltoluene continuous dehydrogenation reaction in a fixed bed reactor. Compared to the unmodified Pt/Al2O3 catalyst, the WPt/Al2O3 catalyst could enable 18H-DBT continuous dehydrogenation at 250 °C, with the degree of dehydrogenation increasing from 80% to 90% and remaining stable even after 150 h. It is attributed to the unique structure of the Pt species on the WPt/Al2O3 catalyst, which exists in the form of cubic Pt nanoparticles and enhances the hydrogen spillover effect from Pt to tungsten oxides on the catalyst surface, improving the activity and stability.
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DOI
高影响因子
Journal of Physical Chemistry C
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2021
·
IF 4.126
Feng Shi,Lili Hu,Yun Cui,Jinjun Ren
Glasses in the xLa2O3-yAl2O3-(100 – x – y)NaPO3 system were synthesized by a melt quenching method, where 0 ≤ x ≤ 7.5, y = 0 and x = 5, 5 ≤ y ≤ 15. The structures were characterized by advanced multinuclei solid-state nuclear magnetic resonance spectroscopy (SSNMR) and X-ray photoelectron spectroscopy (XPS). 31P MAS NMR spectroscopy indicates that the glass Q2 structure is depolymerized by La2O3 and Al2O3, forming multiple QxAln and QyLan phosphorus species, where n, x, and y represent the number of P–O–P, P–O–Al, and P–O–La bonds, respectively. The various phosphorus species were identified by the J-coupling effect based one and two-dimensional (1D and 2D) experiments such as 2D J-resolved, 1D refocused INADEQUATE and 1D 31P{27Al} J-coupling heteronuclear multiple quantum coherence (HMQC). La is used as a mimic to simulate the local structure of the luminescent rare earth ions. 139La wideband uniform rate smooth truncation quadrupolar Carr–Purcell–Meiboom–Gill (WURST-QCPMG) spectra show that the coordination number of La is dominantly nine, and some La atoms transfer to lower coordination with the addition of Al2O3. La, Al, and Na atoms exclusively bond to phosphorus tetrahedron PO4, which is evidenced by the 31P/23Na, 31P/27Al double resonance NMR, XPS, and the calculation of charge balance. However, the Al/P and La/P connection methods are much different based on the calculation of charge balance and bond number. Finally, comprehensive and novel local structure models are developed for these rare earth-doped aluminum phosphate glasses.
研究领域:
材料科学
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化学
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2023
·Vol. 109
·期 1
·86-96
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IF 2.5
Miao Jinghao,Song Xiaolei,Duan Zhenxin,Lin Lin,Chen Rui,Guo Wenyu,Li Bingbing,Song Ying,Han Ying,Ran Xu
Organic dye contamination in water was a non-negligible threat to the environment. Mesoporous Al 2 O 3 nanofibers had been ideal and effective adsorbents for dye adsorption. Based on cost, security, and practicability, in this work, mesoporous Al 2 O 3 nanofibers with ribbon-like structure were prepared by electrospinning technology employing aluminum nitrate (AN) and polyvinyl butyral (PVB) as starting materials. Spinning solution was acquired by mixing the AN aqueous and PVB ethanol solutions. During the calcination of as-spun nanofibers at 600–1200 °C, mesopores emerged due to the decomposition of PVB. The evolution of pore structure and microstructure of fibers were characterized. Samples prepared at 800 °C had the highest BET surface area (96.2 m 2 ·g −1 ) and the strongest adsorption capacity for Congo red (230.41 mg·g −1 ). Adsorption processes fitted well with pseudo-2nd-order and Freundlich isotherm models. Ideal reuse performance of fibers favored their practical applications in water treatment technologies. Graphical Abstract
研究领域:
环境科学
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材料科学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Jiaqin Liu,Chuanyao Liu,Aisheng Huang
Hydrogen has been regarded as the most promising clean and renewable energy. Beside the production of the hydrogen, the separation of hydrogen is also an import issue before it can be used in fuel cells. Membrane-based separation technologies have gained considerable attentions due to its high efficiency and low energy consumption. Zeolite imidazolate framework (ZIF) membranes have drawn intense interest due to their zeolite-like properties such as permanent porosity, uniform pore size and exceptional thermal and chemical stability. It is rather challenged to prepare well-intergrown Co-based zeolitic imidazolate frameworks (ZIFs) membranes on porous α-Al 2 O 3 tubes since Co-based ZIFs prefer to form crystals in the synthesis solution rather than grow as membrane layer on the support surface. In this work, we report the preparation of high-quality ZIF-9 membrane with high H 2 /CO 2 selectivity and excellent thermal stability by using 3-aminopropyltriethoxysilane (APTES) as a covalent linker to modify the α-Al 2 O 3 tube. Due to the formation of covalent bonds between APTES and ZIF-9, ZIF-9 nutrients are bound to the support surface, thus promoting the growth of dense and phase-pure ZIF-9 membrane with a thin thickness of about 4.0 μm. The gas separation performances of the ZIF-9 membrane were evaluated by single gas permeation and mixture gas separation of H 2 /CO 2 , H 2 /N 2 and H 2 /CH 4 , respectively. The mixture separation factors of H 2 /CO 2 , H 2 /CH 4 , and H 2 /N 2 of the ZIF-9 membrane are 21.5, 8.2 and 14.7, respectively, which by far exceeds corresponding Knudsen coefficients. Moreover, the as-prepared ZIF-9 membrane exhibits excellent stability at a relatively broad range of operating temperature, which is beneficial for the industrial application of hydrogen separation or further membrane reactor .
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xuehan Gao,Weifeng Zhi,Dongmei Huang,Wenyu Pan,Xinhang Ma,Liyi Pan,Zequan Li,Shuangliang Zhao
Hydrogenated nitrile butadiene rubber (HNBR) is a crucial material for high-performance sealing applications; however, conventional solution hydrogenation is often limited by high noble-metal consumption and the challenges in simultaneously achieving high activity, selectivity and stability. Herein, a synergistic design strategy integrating mass transfer enhancement, bimetallic electronic synergy, and support interface stabilization is proposed for efficient NBR hydrogenation. A Pd-Ni bimetallic-doped TiO 2 -Al 2 O 3 porous composite catalyst was synthesized through a sol–gel method, in which the pore size distribution was tuned to 15–18 nm by using an F127 template to facilitate macromolecular diffusion. Partial substitution of Pd with Ni modulates the electronic structure of Pd sites, promoting H 2 dissociation and selective C=C bond hydrogenation, while the TiO 2 -Al 2 O 3 composite support provides Lewis acid–base sites and oxygen vacancies that enhance metal dispersion and catalyst stability. The optimized Pd–1Ni catalyst achieves a hydrogenation degree of 92% at 120 °C and 4 MPa, and retains over 80% of its activity after five consecutive cycles. This work demonstrates an effective strategy for balancing catalytic activity, noble-metal utilization, and operational stability in heterogeneous NBR hydrogenation systems, providing a practical reference for catalyst design in polymer hydrogenation processes.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2019
·
IF 4.029
Yaochun Qiang,Zhifang Pan,Mingzhang Liang,Jianfei Xu,Xinyu Ye,Libin Xia,Weixiong You,Junxiang Fu,Hong Ming
Multilayered inorganic transparent materials have been widely used as laser materials, scintillators and phosphors due to their excellent combined properties or functions. However, owing to the limitation of the current preparation technology, only the ceramics with cubic crystal structure could be fabricated into multilayered transparent materials, which has greatly obstructed the diversity of multilayered transparent materials. Here we report a novel non-cubic multilayered transparent phosphor with a ceramic/glass/ceramic sandwich-like structure prepared by controlling crystallization from Eu 2 O 3 -SrO-Al 2 O 3 -SiO 2 bulk glass. The ceramic thicknesses, total transmittances, emission colors and the fluorescence quantum yields of the samples can be adjusted continuously within a certain range. The multilayered transparent phosphor could be used as a potential candidate for the white LEDs with high color rendering index. It can be anticipated that the controlled crystallization from bulk glass method is a simple, fast, cost-effective and promising synthesis approach to prepare non-cubic transparent materials with ceramic/glass/ceramic structures.
研究领域:
材料科学
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光学材料
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陶瓷
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固态照明
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光致发光
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DOI
高影响因子
ACS Omega
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2021
·
IF 3.512
Xufei Shao,Xiaotong Li,Jinzhu Ma,Runduo Zhang,Hong He
Ozone is a poisonous gas, so it is necessary to remove excessive ozone in the environment. Catalytic decomposition is an effective way to remove ozone at room temperature. In this work, 10%Ag/nano-Al2O3 and 10%Ag/AlOOH-900 catalysts were synthesized by the impregnation method. The 10%Ag/nano-Al2O3 catalyst showed 89% ozone conversion for 40 ppm O3 for 6 h under a space velocity of 840 000 h–1 and a relative humidity of 65%, which is superior to 10%Ag/AlOOH-900 (45% conversion). The characterization results showed Ag nanoparticles to be the active sites for ozone decomposition, which were more highly dispersed on nano-Al2O3 as a result of the greater density of terminal hydroxyl groups. The understanding of the dispersion and valence of silver species gained in this study will be beneficial to the design of more efficient supported silver catalysts for ozone decomposition in the future.
研究领域:
环境催化
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材料化学
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纳米催化
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大气污染控制
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表面化学
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DOI
高影响因子
MATERIALS LETTERS
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2023
·
IF 3
Junming Chen,Yibin Dou,Ruyi Zhao,Yunchao Lu,Longquan Liu
Hollow microlattice material is a kind of excellent heat insulation material due to its special microstructural characteristics and ultra-low relative density. However, the possibility of oxidation at the temperature higher than 500℃ limits its application in the high-temperature insulation fields, such as rockets and aircraft engines. In order to overcome this obstacle, this study successfully prepared nano-Al 2 O 3 reinforced metallic hollow microlattice materials with an equivalent density of 26.5 mg/cm 3 . Heat insulation tests and thermogravimetric (TG) experiments were also carried out to investigate the thermal performances of the Al 2 O 3 reinforced metallic hollow microlattice materials, while the effect of the concentration of the Al 2 O 3 was also investigated in accordance with the comparative tests. The results indicate that the Al 2 O 3 plays a significant role in hindering the high-temperature oxidation of hollow microlattice material, especially with Al 2 O 3 concentration in the range of 2 g/L to 4 g/L, and the heat insulation performance can be improved by 13.9%.
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DOI
高影响因子
SOLID STATE IONICS
·
2014
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IF 2.112
Jing Yang,Zhen Huang,Bingxin Huang,Jing Zhou,Xiaoxiong Xu
NASICON-type structure lithium ion conductors have been considered as promising solid electrolytes due to its very high Li + -ion conductivity and chemical stability. In this paper, NASICON-type structured Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) glass–ceramics are prepared from crystallization of glass powders, which are obtained by a simple melt-quench method. NH 4 H 2 PO 4 , H 3 PO 4 , P 2 O 5 and H 3 PO 4 &Al(PO 3 ) 3 are used as phosphorus sources, respectively. The obtained LAGP glass–ceramics are systematically characterized with X-ray diffraction, field emission scanning electron microscopy , differential scanning calorimetry and AC impedance spectroscopy . The different impurities are formed depending on the phosphorus sources, which further influence the microstructure. As a result, the lithium ion conductivity is significantly affected by the phosphorus sources. The highest conductivity of 5.21 × 10 − 4 S·cm − 1 is obtained when H 3 PO 4 is used as the phosphorus source under optimum conditions.
研究领域:
材料科学
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固态离子学
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无机非金属材料
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能源材料
·
电化学
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DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2019
·
IF 7.181
Zhong Ma,Shuai Zhang,Rui Xiao
The Fe 2 O 3 -Al 2 O 3 oxygen carrier is regarded to a promising candidate for chemical looping combustion (CLC). However, Fe 2 O 3 -Al 2 O 3 oxygen carrier was often subjected to a decrease of oxygen carrying capacity. The deactivation mechanism of Fe 2 O 3 -Al 2 O 3 oxygen carrier in chemical looping combustion was investigated over consecutive 20 cycles. The Fe 2 O 3 -Al 2 O 3 oxygen carrier exhibited relatively poor redox stability in a fixed bed reactor. The physico-chemical properties of cycled Fe 2 O 3 -Al 2 O 3 oxygen carrier were characterized by different characterization methods. No carbon deposit was detected in the reduction process, indicating that carbon deposition was not the cause for Fe 2 O 3 -Al 2 O 3 oxygen carrier deactivation under this experimental condition. The characterization results showed that the deactivation of Fe 2 O 3 -Al 2 O 3 oxygen carrier in redox cycles was mainly attributed to thermal sintering. The cycled Fe 2 O 3 -Al 2 O 3 oxygen carrier showed lower surface area, lower reducibility and oxygen mobility than that of fresh sample. After a certain number of redox cycles, Fe diffusion and enrichment at the surface of cycled oxygen carrier was observed. The surface Fe is unstable under high reaction temperature, leading to accelerate thermal sintering. A deactivation mechanism of Fe 2 O 3 -Al 2 O 3 oxygen carrier in CLC was proposed based on the Fe diffusion and surface sintering.
研究领域:
化学工程
·
能源技术
·
材料科学
·
催化
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DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Wen Liu,Xifei Li,Dongbin Xiong,Youchen Hao,Jianwei Li,Huari Kou,Bo Yan,Dejun Li,Shigang Lu,Alicia Koo,Keegan Adair,Xueliang Sun
LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM) is a highly potential cathode material for lithium-ion batteries (LIBs). However, its poor rate capability and cycling performance at high cutoff voltages have seriously hindered further commercialization. In this study, we successfully design an ultra-thin lithium aluminum oxide (LiAlO 2 ) coating on NCM for LIBs. Compared to Al 2 O 3 , the utilization of lithium-ion conducting LiAlO 2 significantly improves the NCM performance at high cutoff voltages of 4.5/4.7 V. The study reveals that the LiAlO 2 -coated NCM can maintain a reversible capacity of more than 149 mA h g −1 after 350 cycles with 0.078% decay per cycle. Furthermore, LiAlO 2 -coated NCM exhibits higher rate capacities [206.8 mA h g −1 at 0.2 C (50 mA g −1 ) and 142 mA h g −1 at 3 C] than the Al 2 O 3 -coated NCM (196.9 mA h g −1 at 0.2 C and 131.9 mA h g −1 at 3 C). Our study demonstrates that the ultra-thin LiAlO 2 coating is superior to Al 2 O 3 and significantly improves the capacity retention and rate capability of NCM for LIBs.
研究领域:
材料科学
·
电化学
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储能
·
电池技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）