Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 20

年份

2023 3

2021 3

2020 1

2019 1

2017 1

2016 2

2015 3

2014 1

2009 1

2006 1

2004 1

2000 2

展开︾

关键词

多晶硅 3

ITO 1

三氣氢硅法 1

个旧锡矿 1

位错增殖 1

半导体工业 1

单晶硅 1

单晶种铸造 1

回收 1

地球化学 1

多晶成核 1

废料 1

微波加热 1

微波装备 1

成矿作用演化 1

流程 1

混酸溶浸—硫化沉锡工艺 1

熔炼 1

生产 1

展开︾

检索范围：

排序：展示方式：

Sub-nanometer finishing of polycrystalline tin by inductively coupled plasma-assisted cutting

《机械工程前沿（英文）》 2023年第18卷第3期 doi: 10.1007/s11465-023-0751-5

摘要： Polycrystalline tin is an ideal excitation material for extreme ultraviolet light sources. However, the existence of grain boundary (GB) limits the surface roughness of polycrystalline tin after single-point diamond turning (SPDT). In this work, a novel method termed inductively coupled plasma (ICP)-assisted cutting was developed for the sub-nanometer finishing of polycrystalline tin. The relationship between ICP power, processing time, and modification depth was established by thermodynamic simulation, and the fitted heat transfer coefficient of polycrystalline tin was 540 W/(m²·K). The effects of large-thermal-gradient ICP treatment on the microstructure of polycrystalline tin were studied. After 0.9 kW ICP processing for 3.0 s, corresponding to the temperature gradient of 0.30 K/µm, the grain size of polycrystalline tin was expanded from a size of approximately 20–80 μm to a millimeter scale. The Taguchi method was used to investigate the effects of rotational speed, depth of cut, and feed rate on SPDT. Experiments conducted based on the ICP system indicated that the plasma-assisted cutting method promoted the reduction of the influence of GB steps on the finishing of polycrystalline tin, thereby achieving a surface finish from 8.53 to 0.80 nm in Sa. The results of residual stress release demonstrated that the residual stress of plasma-assisted turning processing after 504 h stress release was 10.7 MPa, while that of the turning process without the ICP treatment was 41.6 MPa.

关键词： plasma-assisted cutting polycrystalline tin single-point diamond turning surface roughness

HTML PDF 收藏

Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale

Bruno SUDRET,Hung Xuan DANG,Marc BERVEILLER,Asmahana ZEGHADI,Thierry YALAMAS

《结构与土木工程前沿（英文）》 2015年第9卷第2期页码 121-140 doi: 10.1007/s11709-015-0290-1

摘要： The spatial variability of stress fields resulting from polycrystalline aggregate calculations involving random grain geometry and crystal orientations is investigated. A periodogram-based method is proposed to identify the properties of homogeneous Gaussian random fields (power spectral density and related covariance structure). Based on a set of finite element polycrystalline aggregate calculations the properties of the maximal principal stress field are identified. Two cases are considered, using either a fixed or random grain geometry. The stability of the method w.r.t the number of samples and the load level (up to 3.5% macroscopic deformation) is investigated.

关键词： polycrystalline aggregates crystal plasticity random fields spatial variability correlation structure

HTML PDF 收藏

Novel seed-assisted synthesis of indium tin oxide submicro-cubes and their resistivity

《化学科学与工程前沿（英文）》 2023年第17卷第5期页码 557-569 doi: 10.1007/s11705-022-2249-9

摘要： Indium tin oxide films, an important n-type semiconductor oxide, show great prospects in optoelectronic device applications. Consequently, as a key raw material of targets for sputtering films, it is important to prepare low-resistivity indium tin oxide powders. Herein, low-resistivity indium tin oxide submicro-cubes are synthesized by a seed-assisted coprecipitation method. The effects of seed content, In³⁺ concentration, aging time, reaction temperature and calcination temperature on resistivity were investigated by single factor and orthogonal experiments. To ensure reliability and reproducibility of data, each experiment was repeated three times and resistivity of each sample was measured three times to obtain average value. The results indicated that optimal sample was matched with cubic phase In₂O₃. The single-crystal indium tin oxide particles exhibited a regular cubic shape with a size of nearly 500 nm and low resistivity of 0.814 Ω·cm. Compared with particles prepared by the conventional coprecipitation method, indium tin oxide submicro-cubes showed good dispersion. The presence of seed particles provided nucleation sites with lower energy barriers and promoted formation of submicro-cubes. The face-to-face contact among particles and good dispersion contributed to electron transfer, resulting in lower resistivity. The seed-assisted synthesis provides a novel way to prepare low-resistivity indium tin oxide submicro-cubes.

关键词： indium tin oxide submicro-cubes resistivity seed-assisted coprecipitation method orthogonal experiment

HTML PDF 收藏

Uncovering the evolution of tin use in the United States and its implications

《环境科学与工程前沿（英文）》 2021年第15卷第6期 doi: 10.1007/s11783-021-1406-6

摘要：

• US tin use decreases as the GDP value added by manufacturing sector increases.

关键词： Tin use GDP Curve fitting Logistic model Gompertz model

HTML PDF 收藏

grown TiN/N-TiO composite for enhanced photocatalytic H evolution activity

《能源前沿（英文）》 2021年第15卷第3期页码 721-731 doi: 10.1007/s11708-021-0766-8

摘要： Titanium nitride (TiN) decorated N-doped titania (N-TiO₂) composite (TiN/N-TiO₂) is fabricated via an in situ nitridation using a hydrothermally synthesized TiO₂ and melamine (MA) as raw materials. After the optimization of the reaction condition, the resultant TiN/N-TiO₂ composite delivers a hydrogen evolution activity of up to 703 μmol/h under the full spectrum irradiation of Xe-lamp, which is approximately 2.6 and 32.0 times more than that of TiO₂ and TiN alone, respectively. To explore the underlying photocatalytic mechanism, the crystal phase, morphology, light absorption, energy band structure, element composition, and electrochemical behavior of the composite material are characterized and analyzed. The results indicate that the superior activity is mainly caused by the in situ formation of plasmonic TiN and N-TiO₂ with intimate interface contact, which not only extends the spectral response range, but also accelerates the transfer and separation of the photoexcited hot charge carrier of TiN. The present study provides a fascinating approach to in situ forming nonmetallic plasmonic material/N-doped TiO₂ composite photocatalysts for high-efficiency water splitting.

关键词： photocatalytic H₂ evolution TiN/N-TiO₂ composite plasmonic effect in-situ nitridation

HTML PDF 收藏

兴建年产一千吨电子级多晶硅工厂的思考

梁骏吾

《中国工程科学》 2000年第2卷第6期页码 33-35

摘要：

文章简要评述了世界以及中国的电子级多晶硅的生产能力和市场需求。在2000年和2010年中国对多晶硅的需求分别是736 t/a和1304 t/a。但近几年中国的多晶硅生产仅达到80 t/a，所以在中国建设一座年产1000 t电子级多晶硅的工厂是很合理的。然而由最新统计数据可知，自1997年以来，世界多晶硅生产能力连年均超过市场需求，而且在最近的将来，这一趋势将会继续。为了占领国内多晶硅市场，未来的多晶硅工厂将面临挑战，产品质量和生产成本是应当考虑的最重要指标。为了占领国内市场，在保证多晶硅产品纯度的前提下，生产成本只能略微超过20美元/kg。

关键词：多晶硅半导体工业规模生产

HTML PDF 收藏

Electrochemical oxidation of humic acid at the antimony- and nickel-doped tin oxide electrode

TANG Chengli,YAN Wei,ZHENG Chunli

《环境科学与工程前沿（英文）》 2014年第8卷第3期页码 337-344 doi: 10.1007/s11783-013-0545-9

摘要： This work investigated the degradation of humic acid (HA) in aqueous solution by electrochemical oxidation with Antimony- and Nickel-doped Tin oxide electrode (Ni-Sb-SnO /Ti electrode) as the anode. Initial concentrations of HA ranged from 3 to 9 mg·L . Under such a concentration scope, the degradation of HA was a mass transfer controlled process. Degradation rate increased with the increase of HA initial concentration. Test on the effect of tert-butanol revealed that ·OH played an important role in the oxidation of HA. The absence of cation Ca was beneficial to HA degradation, which suggested that both indirect and direct electrolyze happened during the whole electrochemical oxidation process. Alkaly (pH= 12) and neutral (pH= 7) conditions were benefical to HA degradation.

关键词： electrochemical oxidation humic acid (HA) natural water Ni-Sb-SnO₂/Ti electrode

HTML PDF 收藏

A thermoelectric generator and water-cooling assisted high conversion efficiency polycrystalline silicon

Zekun LIU, Shuang YUAN, Yi YUAN, Guojian LI, Qiang WANG

《能源前沿（英文）》 2021年第15卷第2期页码 358-366 doi: 10.1007/s11708-020-0712-1

摘要： Solar energy has been increasing its share in the global energy structure. However, the thermal radiation brought by sunlight will attenuate the efficiency of solar cells. To reduce the temperature of the photovoltaic (PV) cell and improve the utilization efficiency of solar energy, a hybrid system composed of the PV cell, a thermoelectric generator (TEG), and a water-cooled plate (WCP) was manufactured. The WCP cannot only cool the PV cell, but also effectively generate additional electric energy with the TEG using the waste heat of the PV cell. The changes in the efficiency and power density of the hybrid system were obtained by real time monitoring. The thermal and electrical tests were performed at different irradiations and the same experiment temperature of 22°C. At a light intensity of 1000 W/m , the steady-state temperature of the PV cell decreases from 86.8°C to 54.1°C, and the overall efficiency increases from 15.6% to 21.1%. At a light intensity of 800 W/m , the steady-state temperature of the PV cell decreases from 70°C to 45.8°C, and the overall efficiency increases from 9.28% to 12.59%. At a light intensity of 400 W/m , the steady-state temperature of the PV cell decreases from 38.5°C to 31.5°C, and the overall efficiency is approximately 3.8%, basically remain unchanged.

关键词： photovoltaic (PV) thermoelectric generator conversion efficiency hybrid energy systems water-cooled plate (WCP)

HTML PDF 收藏

混酸溶浸—硫化沉锡工艺处理ITO废料回收铟锡

王树楷

《中国工程科学》 2009年第11卷第9期页码 34-37

摘要：

采用混酸溶浸—硫化沉锡工艺处理ITO废料，解决了料液难滤和有效回收铟和锡的问题。

关键词： ITO 废料铟锡混酸溶浸—硫化沉锡工艺

HTML PDF 收藏

电子级多晶硅的生产工艺

梁骏吾

《中国工程科学》 2000年第2卷第12期页码 34-39

摘要：

就建设1000t电子级多晶硅厂的技术进行了探讨。对三氣氢硅法、四氣化硅法、二氣二氢硅法和硅烷法生产的多晶硅质量、安全性、运输和存贮的可行性、有用沉积比、沉积速率、一次转换率、生长温度、电耗和价格进行了对比；对还原或热分解使用的反应器即钟罩式反应器、流床反应器和自由空间反应器也进行了比较。介绍了用三氣氢硅钟罩式反应器法生产多晶硅三代流程。第三代多晶硅流程适于1000t/a级的电子级多晶硅生产。

关键词：多晶硅三氣氢硅法硅烷法流程生产

HTML PDF 收藏

云锡公司的锡冶金技术跃居世界先进水平

《中国工程科学》 2004年第6卷第7期页码 94-94

HTML PDF 收藏

微波熔炼在锡粉回收中的工业应用 Article

许磊, 彭金辉, 白海龙, Srinivasakannan C., 张利波, 吴庆田, 韩朝晖, 郭胜惠, 巨少华, 杨黎

《工程（英文）》 2017年第3卷第3期页码 423-427 doi: 10.1016/J.ENG.2017.03.006

摘要：

本文探讨了微波加热在工业锡粉熔化中的应用。对离心雾化法制备的金属锡粉的形貌和粒径进行了表征锡粉颗粒均且呈球形，90% 的颗粒粒径为38~75 μm。过介电性能测试，研究了锡粉的微波吸收特性微波的穿作用对锡粉具有良好的整体加热能。温度高于150℃时，微波加热锡粉的主要机制是电导损耗设计开发了20 kW 微波熔炼锡合金装备，并将其应用于产业化该装备的加热率与常规方法相比能提高10 倍以上，缩短了熔炼工艺研究结果表明，微波加热加快了升温率，缩短了熔炼时间，锡回收率为97.79%，渣量仅为1.65%，其他损失低于0.56%；单位能耗仅为0.17 kW·h·kg⁻¹远低于传统方法所要的能量。因此微波冶炼提高了加热效率，降低了能耗。

关键词：微波加热熔炼锡粉微波装备回收

HTML PDF 收藏

TIN2012-34003 and TIN2013-47074-C2-1-R) and FPU Scholarship (FPU13/03141) from the Spanish Government

Miguel OLIVER,Francisco MONTERO,José Pascual MOLINA,Pascual GONZÁLEZ,Antonio FERNÁNDEZ-CABALLERO

《信息与电子工程前沿（英文）》 2016年第17卷第4期页码 348-364 doi: 10.1631/FITEE.1500347

摘要： This paper seeks to determine how the overlap of several infrared beams affects the tracked position of the user, depending on the angle of incidence of light, distance to the target, distance between sensors, and the number of capture devices used. We also try to show that under ideal conditions using several Kinect sensors increases the precision of the data collected. The results obtained can be used in the design of telerehabilitation environments in which several RGB-D cameras are needed to improve precision or increase the tracking range. A numerical analysis of the results is included and comparisons are made with the results of other studies. Finally, we describe a system that implements intelligent methods for the rehabilitation of patients based on the results of the tests carried out.

关键词： Kinect sensor Rehabilitation system Capture precision Multi-camera system

HTML PDF 收藏

个旧锡矿地球化学及成矿作用演化

秦德先,黎应书,范柱国,陈爱兵,谈树成,洪托,李连举,林小平

《中国工程科学》 2006年第8卷第1期页码 30-39

摘要：

关于个旧锡矿床的成因，过去多数人持“花岗岩岩浆期后热液成矿”观点。笔者的研究成果表明，个旧锡矿具有多期、多源成矿，可划分为3个成矿系列，即印支期海底基性火山成矿系列、海底喷流成矿系列和燕山晚期花岗岩改造（叠加）成矿系列，成矿模式可归结为“裂谷环境—火山沉积—喷流热水沉积—花岗岩叠加改造”；在划分成矿系列的基础上，重点从矿床的微量及稀土元素、稳定同位素及流体包裹方面来论证新的成矿观点。

关键词：个旧锡矿地球化学稳定同位素成矿作用演化

HTML PDF 收藏

Utilizing transparent and conductive SnO

Jing Gu, Hongtao Yu, Xie Quan, Shuo Chen, Junfeng Niu

《环境科学与工程前沿（英文）》 2020年第14卷第4期 doi: 10.1007/s11783-020-1251-z

摘要： Abstract • A novel Z-scheme Si-SnO2-TiOx with SnO2 as electron mediator is first constructed. • Transparent and conductive SnO2 can pass light through and promote charge transport. • VO from SnO2 and TiOx improve photoelectrochemical performances. • Efficient photocatalytic degradations originate from the Z scheme construction. Z-scheme photocatalysts, with strong redox ability, have a great potential for pollutants degradation. However, it is challenging to construct efficient Z-scheme photocatalysts because of their poor interfacial charge separation. Herein, by employing transparent and conductive SnO2 as electron mediator to pass light through and promote interfacial charge transportation, a novel Z-scheme photocatalyst Si-SnO2-TiOx (1

关键词： Z-scheme photocatalyst Tin oxide Electron mediator Organic pollutant