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学者姓名：席晓丽
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摘要 ：
The use and scrap of cemented carbide, especially WC-Co series cemented carbide, are increasing every year. Recycle of cemented carbide scrap is paid attention to more and more by researchers. In this paper, the molten salt electrolysis method was employed to extract tungsten and cobalt. The focal points of this study were the electrochemical dissolution mechanism of WC-Co two-phase scraps and the treatment process of multiple pieces of WC-Co scrap. Electrochemical impedance spectroscopy indicated that the dissolution mechanism of WC-Co composite had the anodic potential dependence. The equivalent circuit model of WC-Co two-phase composite can adopt the "R-ct parallel model" of cobalt and tungsten carbide. M the case of surface area evolution or multiple anodes electrolysis, the equivalent circuit model can also adopt the "R-ct parallel model", which built a bridge between single WC-Co anode and multiple WC-Co anodes. Consequently, we designed and achieved the recovery process of multiple WC-Co anodes. The XRD analysis and elemental analysis showed that the products were pure cobalt and pure tungsten, respectively.
关键词 ：
Cemented carbide scraps Cemented carbide scraps Multiple anodes Multiple anodes Molten-salt electrolytic recovery Molten-salt electrolytic recovery Electrochemical dissolution mechanism Electrochemical dissolution mechanism
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| GB/T 7714 | Zhang, Qinghua , Xi, Xiaoli , Zhang, Liwen et al. The electrochemical dissolution mechanism and treatment process in the molten-salt electrolytic recovery of WC-Co two-phase scraps [J]. | JOURNAL OF ELECTROANALYTICAL CHEMISTRY , 2021 , 896 . |
| MLA | Zhang, Qinghua et al. "The electrochemical dissolution mechanism and treatment process in the molten-salt electrolytic recovery of WC-Co two-phase scraps" . | JOURNAL OF ELECTROANALYTICAL CHEMISTRY 896 (2021) . |
| APA | Zhang, Qinghua , Xi, Xiaoli , Zhang, Liwen , Feng, Ming , Nie, Zuoren , Ma, Liwen . The electrochemical dissolution mechanism and treatment process in the molten-salt electrolytic recovery of WC-Co two-phase scraps . | JOURNAL OF ELECTROANALYTICAL CHEMISTRY , 2021 , 896 . |
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摘要 ：
纳米氧化钨作为一种具有独特物理化学性质的半导体功能材料,已被广泛应用于环境、能源、生命科学、信息技术等领域。本文基于第一性原理计算在纳米氧化钨中的应用进展,概述了量子力学基础上的第一性原理及密度泛函理论的发展历程及基本理论,介绍了该领域常用的MS (Materials studio)、VASP (Vienna ab initio simulation package)等模拟计算软件,并分类阐述了第一性原理计算对氧化钨的微观电子结构、物质相互作用、分子热动力学等方面的研究成果。最后提出了第一性原理计算在纳米氧化钨这类半导体材料研究中存在的问题及未来发展趋势。
关键词 ：
电子结构 电子结构 第一性原理 第一性原理 综述 综述 模拟计算 模拟计算 纳米氧化钨 纳米氧化钨
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| GB/T 7714 | 赵林艳 , 刘阳思 , 席晓丽 et al. 基于第一性原理计算的纳米氧化钨研究进展 [J]. | 无机材料学报 , 2021 , (11) : 1125-1136 . |
| MLA | 赵林艳 et al. "基于第一性原理计算的纳米氧化钨研究进展" . | 无机材料学报 11 (2021) : 1125-1136 . |
| APA | 赵林艳 , 刘阳思 , 席晓丽 , 马立文 , 聂祚仁 . 基于第一性原理计算的纳米氧化钨研究进展 . | 无机材料学报 , 2021 , (11) , 1125-1136 . |
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摘要 ：
作为关键基础材料,高性能合金在高端装备制造、新能源等战略性新兴产业中发挥着至关重要的作用.随着我国战略性新兴产业的发展壮大,对合金材料的需求将大幅增加.合金材料的制备需要消耗大量金属矿产资源,特别是涉及多种稀缺金属.与此同时,废旧合金的社会累积量逐年增加,影响生态环境.因此,如何协调资源、发展和环境之间的关系成为国际研究热点,发展循环经济被认为是实现可持续发展的重要出路.硬质合金、轻质合金和高温合金在国民经济和国防领域具有广泛且重要的应用,本文以碳化钨硬质合金、轻质铝合金和高温镍基合金三类典型合金为研究对象,系统分析了其资源储备、废料特点和回收再利用现状,并对典型合金循环利用未来发展方向进行了展望.
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| GB/T 7714 | 王曼 , 席晓丽 , 王亚楠 et al. 典型合金循环利用研究进展及挑战 [J]. | 化工进展 , 2021 , 40 (10) : 5270-5280 . |
| MLA | 王曼 et al. "典型合金循环利用研究进展及挑战" . | 化工进展 40 . 10 (2021) : 5270-5280 . |
| APA | 王曼 , 席晓丽 , 王亚楠 , 唐康尧 . 典型合金循环利用研究进展及挑战 . | 化工进展 , 2021 , 40 (10) , 5270-5280 . |
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摘要 ：
从钼的多元素体系中协同萃取钼有更好效果。综述了协同萃取法在不同含钼多元素体系中萃取钼的研究状况,主要涉及钼-钨、钼-铁/铝/镍等体系及钼-钒体系,阐述了协萃机制及酸碱耦合作用和疏水效应对协同萃取的影响,以及离子液体萃取技术的应用状况,展望了协萃体系的发展前景。
关键词 ：
分离 分离 协同萃取 协同萃取 机制 机制 钼 钼
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| GB/T 7714 | 蔡圆圆 , 马立文 , 席晓丽 . 从含钼多元素体系中协同萃取钼的研究现状 [J]. | 湿法冶金 , 2021 , 40 (03) : 179-185 . |
| MLA | 蔡圆圆 et al. "从含钼多元素体系中协同萃取钼的研究现状" . | 湿法冶金 40 . 03 (2021) : 179-185 . |
| APA | 蔡圆圆 , 马立文 , 席晓丽 . 从含钼多元素体系中协同萃取钼的研究现状 . | 湿法冶金 , 2021 , 40 (03) , 179-185 . |
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摘要 ：
"资源循环工程设计"课程是资源循环科学与工程专业的一门特色工科专业课.通过工程设计专业知识、设计案例及设计实操三个维度的教学内容,运用多媒体资源、实例训练和设计实习等教学方法,使学生掌握资源循环工程设计的基本技能,具备分析和解决资源循环工程实际问题的初步能力,提升综合学习和团队协作能力."资源循环工程设计"课程建设的探索与实践,为进一步推进教学改革奠定了基础.
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| GB/T 7714 | 马立文 , 席晓丽 , 王曼 . "资源循环工程设计"课程建设探索与实践 [J]. | 教育教学论坛 , 2021 , (21) : 97-100 . |
| MLA | 马立文 et al. ""资源循环工程设计"课程建设探索与实践" . | 教育教学论坛 21 (2021) : 97-100 . |
| APA | 马立文 , 席晓丽 , 王曼 . "资源循环工程设计"课程建设探索与实践 . | 教育教学论坛 , 2021 , (21) , 97-100 . |
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摘要 ：
Abstract: The molten salt electrochemical method is an efficient one-step process to extract tungsten from tungsten carbide (WC). Owing to the limitation of molten salt electrochemical experiments and the number of data points, determining the optimal process conditions is challenging. In addition, the mechanism that affects the current efficiency is difficult to obtain intuitively. In this study, simulations of tungsten carbide anode electrolysis were obtained using the COMSOL Multiphysics 5.3, and the results were compared to the dissolution experiment of tungsten carbide with varying content of sodium tungstate (Fig. 1). The experimental data fitted well with the theoretical current efficiency of 75%. At concentrations below 0.5 wt% of sodium tungstate, the anode dissolution showed a linear relationship against the concentration of sodium tungstate. At a constant concentration of sodium tungstate, the anodic dissolution decreased with increasing immersion depth, consistent with the variation of cell voltage difference before and after electrolysis. The optimal immersion depth and effective area of the anode estimated by simulations were 2.5 mm and 0.465 mm2, respectively (Fig. 2). Under the optimum electrolysis conditions simulated by COMSOL, the nano tungsten powder was obtained. Graphic abstract: [Figure not available: see fulltext.] © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
关键词 ：
Anodes Anodes Dissolution Dissolution Efficiency Efficiency Electrolysis Electrolysis Fused salts Fused salts Sodium Sodium Tungsten carbide Tungsten carbide Tungsten powder metallurgy Tungsten powder metallurgy
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| GB/T 7714 | Zhang, Li-wen , Xi, Xiao-li , Nie, Zuo-ren et al. Simulation analysis on optimization of tungsten carbide recovery efficiency by molten salt electrolysis [J]. | Journal of Applied Electrochemistry , 2021 , 51 (6) : 861-870 . |
| MLA | Zhang, Li-wen et al. "Simulation analysis on optimization of tungsten carbide recovery efficiency by molten salt electrolysis" . | Journal of Applied Electrochemistry 51 . 6 (2021) : 861-870 . |
| APA | Zhang, Li-wen , Xi, Xiao-li , Nie, Zuo-ren , Li, Jian-rong . Simulation analysis on optimization of tungsten carbide recovery efficiency by molten salt electrolysis . | Journal of Applied Electrochemistry , 2021 , 51 (6) , 861-870 . |
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摘要 ：
Tungsten ditelluride (WTe2) is arising as an attractive material in magnetoresistance (MR) properties filed. The magnetoresistance properties of WTe2 makes it an ideal material for its magnetoresistive heads of computer and magnetic sensor device applications. So far, people have developed various controlled synthesis methods to produce large-quantity uniform flat WTe2 crystals. Nevertheless, none of the methods are sustainable, some methods use reducing gases, and some use very long heat preservation, and the process is very complicated. Here, a mild and fast self-flux method is described for WTe2 synthesis that can avoid producing reducing gases. After conducting structural and physical tests, it is found that annealing time is critical for WTe2 structure formation. Long annealing time improves the crystallinity of WTe2 and makes its texture more obvious, increasing the conductivity of WTe2. Therefore, it will lead to the anomalous nonsaturating positive magnetoresistance with different field dependent behaviors, reaching the ultrastrong magnetoresistive value of 1040% at 5 K and 14 T. The results provide a sustainable approach for uniform WTe2 crystal synthesis, which will benefit the large-quantity production of WTe2 magnetoresistive materials.
关键词 ：
annealing time annealing time magnetoresistance magnetoresistance tungsten ditelluride tungsten ditelluride
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| GB/T 7714 | Cao, Mingxing , Wang, Zhihong , Ma, Liwen et al. Tungsten Ditelluride: Synthesis, Structure, and Magnetoresistance Property [J]. | ADVANCED ELECTRONIC MATERIALS , 2021 . |
| MLA | Cao, Mingxing et al. "Tungsten Ditelluride: Synthesis, Structure, and Magnetoresistance Property" . | ADVANCED ELECTRONIC MATERIALS (2021) . |
| APA | Cao, Mingxing , Wang, Zhihong , Ma, Liwen , Zhang, Liwen , Wang, Man , Liu, Yangsi et al. Tungsten Ditelluride: Synthesis, Structure, and Magnetoresistance Property . | ADVANCED ELECTRONIC MATERIALS , 2021 . |
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摘要 ：
W alloys prepared via oxide dispersion strengthening have shown enhanced mechanical performance. In this paper, W-1.10 vol% Zr-2.00 vol% Y2O3 (WZY) and W-1.10 vol% Zr-2.00 vol% Er2O3 (WZE) were fabricated to investigate the effects of formation of complex oxide dispersions on mechanical properties and microstructure of multi-doped W alloys. By controlling the atomic ratio of added ZrH2 and rare earth oxides through composition design, the goal of complete formation of complex oxide particles with pyrochlore structure (A(2)B(2)O(7)) was achieved. Electron probe microanalysis (EPMA) and transmission electron microscopy (TEM) results showed that these dispersion particles in WZY and WZE were Y2Zr2O7 and Er2Zr2O7, respectively. Moreover, microstructure analysis showed that Er 2 Zr2O7 exhibited smaller size, higher number density and more homogenous distribution compared to Y2Zr2O7, which led to finer grains of WZE (0.58 +/- 0.03 mu m) compared to WZY (1.34 +/- 0.29 mu m). Finer microstructure including smaller grains and dispersion particles of WZE contributed to its higher strength and better ductility. Furthermore, the formation mechanism of complex oxide dispersion particles was discussed in detail.
关键词 ：
Complex oxide dispersion particles Complex oxide dispersion particles Mechanical property Mechanical property Microstructure Microstructure Multi-doped W alloys Multi-doped W alloys
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| GB/T 7714 | Sun, Honghong , Wang, Man , Xi, Xiaoli et al. Effects of formation of complex oxide dispersions on mechanical properties and microstructure of multi-doped W alloys [J]. | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2021 , 824 . |
| MLA | Sun, Honghong et al. "Effects of formation of complex oxide dispersions on mechanical properties and microstructure of multi-doped W alloys" . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 824 (2021) . |
| APA | Sun, Honghong , Wang, Man , Xi, Xiaoli , Nie, Zuoren . Effects of formation of complex oxide dispersions on mechanical properties and microstructure of multi-doped W alloys . | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING , 2021 , 824 . |
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摘要 ：
Efficient electrochemical dissolution of tungsten carbide is crucial to obtain an efficient recovery of cemented carbide via molten salt electrolysis. Based on the interfacial process, the dissolution mechanism of tungsten carbide in oxygen-containing molten salt was investigated via a mass loss test, electrochemical tests, and first principles calculations. Through the mass loss study, it was found that, although the tungsten-carbon bond was extremely stable, an effective electrochemical dissolution of tungsten carbide could also occur in the presence of oxygen ions. The electrochemical tests demonstrated that an increase in oxygen ions leads to a continuous substitution of chloride ions with oxygen ions on the anode surface. These oxygen ions are further converted into oxygen atoms under the action of an electric field. The oxygen atoms on the anode surface can then effectively destroy the tungsten-carbon bond and promote mass loss, as demonstrated by first principles calculations. In addition, the appearance of maximum mass can be related to the saturation of the electrostatic adsorption of oxygen ions.
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| GB/T 7714 | Zhang, Qinghua , Xi, Xiaoli , Zhang, Liwen et al. Efficient Dissolution of Tungsten Carbide Using an Oxygen-Containing Molten Salt [J]. | JOURNAL OF THE ELECTROCHEMICAL SOCIETY , 2021 , 168 (5) . |
| MLA | Zhang, Qinghua et al. "Efficient Dissolution of Tungsten Carbide Using an Oxygen-Containing Molten Salt" . | JOURNAL OF THE ELECTROCHEMICAL SOCIETY 168 . 5 (2021) . |
| APA | Zhang, Qinghua , Xi, Xiaoli , Zhang, Liwen , Nie, Zhuanghua , Nie, Zuoren . Efficient Dissolution of Tungsten Carbide Using an Oxygen-Containing Molten Salt . | JOURNAL OF THE ELECTROCHEMICAL SOCIETY , 2021 , 168 (5) . |
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摘要 ：
In this paper, the flat tungsten coatings with uniform grains were prepared via electrolytic tungsten at 1173 K in ternary molten salt system formed by tungstate, tungsten oxide and different mass fractions of ZrO2. Dense tungsten coatings containing the second phase of ZrO2 were obtained by constant direct current electrodeposition in molten salt, and the coatings have preferential growth orientation along the (2 1 1) crystal plane. These coatings were characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and laser scanning confocal microscope (LSCM). The results show that W-ZrO2 coating obtained at Na2WO4-WO3-ZrO2. In addition, the existence of zirconia in molten salt reduced the coating roughness from 13.567 mu m to 3.017 mu m, the current efficiency was lost from 84.15% to 70.76%, and the grains became fine and uniform. What's more, the mechanical properties and thermal cycle performance of the coating have been effectively improved. To further illustrate the electrochemical process, the electrochemical behavior of tungsten ions and zirconium ions during the electrodeposition was investigated by cyclic voltammetry (CV) and square wave voltammetry (SWV). The results indicated that the reduction reactions of tungsten ions and zirconium ions are divided into two steps, and the reaction processes are as follows: W(VI) -> W(IV) -> W, Zr(IV) -> Zr(II) -> Zr.
关键词 ：
Electrochemical behavior Electrochemical behavior Electrodeposition Electrodeposition Microstructure Microstructure Molten salt Molten salt Tungsten coating Tungsten coating
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| GB/T 7714 | Qin, Wenxuan , Xi, Xiaoli , Zhang, Liwen et al. Electrochemical preparation of W coatings in Na2WO4-WO3-ZrO2 molten salt [J]. | APPLIED SURFACE SCIENCE , 2021 , 561 . |
| MLA | Qin, Wenxuan et al. "Electrochemical preparation of W coatings in Na2WO4-WO3-ZrO2 molten salt" . | APPLIED SURFACE SCIENCE 561 (2021) . |
| APA | Qin, Wenxuan , Xi, Xiaoli , Zhang, Liwen , Wang, Man , Zhang, Qinghua , Wang, Xintao et al. Electrochemical preparation of W coatings in Na2WO4-WO3-ZrO2 molten salt . | APPLIED SURFACE SCIENCE , 2021 , 561 . |
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