期刊文献+
共找到3,601篇文章
< 1 2 181 >
每页显示 20 50 100
Research on the Automatic Pattem Abstraction and Recognition Methodology for Large-scale Database System based on Natural Language Processing 被引量:1
1
作者 RongWang Cuizhen Jiao Wenhua Dai 《International Journal of Technology Management》 2015年第9期125-127,共3页
In this research paper, we research on the automatic pattern abstraction and recognition method for large-scale database system based on natural language processing. In distributed database, through the network connec... In this research paper, we research on the automatic pattern abstraction and recognition method for large-scale database system based on natural language processing. In distributed database, through the network connection between nodes, data across different nodes and even regional distribution are well recognized. In order to reduce data redundancy and model design of the database will usually contain a lot of forms we combine the NLP theory to optimize the traditional method. The experimental analysis and simulation proves the correctness of our method. 展开更多
关键词 Pattern Abstraction and Recognition database system Natural Language processing.
下载PDF
Design and development of expert system for controlling sintering process 被引量:1
2
作者 Wang Haidong(王海东) Qiu Guanzhou(邱冠周) Huang Shengsheng(黄圣生) 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第3期651-654,共4页
The general structure of expert system for controlling sintering process has been proposed. It includes knowledge base, inference engine, data acquisition system, learning system, knowledge base management system, exp... The general structure of expert system for controlling sintering process has been proposed. It includes knowledge base, inference engine, data acquisition system, learning system, knowledge base management system, explanation system and so on. The control functions consist of sintering chemical composition control centered on basicity and sintering process state control centered on permeability. The adaptive prediction of sintering chemical composition, the control strategy centered on basicity, the control strategy centered on permeability, the judgement of permeability and the prediction of burn through point were studied. The software of system, which includes about 1 000 expert rules, was successfully applied in off line control of sintering process in a sintering plant. 展开更多
关键词 sintering EXPERT system process CONTROL
下载PDF
Real-time operation guide system for sintering process with artificial intelligence
3
作者 范晓慧 陈许玲 +1 位作者 姜涛 李桃 《Journal of Central South University of Technology》 EI 2005年第5期531-535,共5页
In order to optimize the sintering process, a real-time operation guide system with artificial intelligence was developed, mainly including the data acquisition online subsystem, the sinter chemical composition contro... In order to optimize the sintering process, a real-time operation guide system with artificial intelligence was developed, mainly including the data acquisition online subsystem, the sinter chemical composition controller, the sintering process state controller, and the abnormal conditions diagnosis subsystem. Knowledge base of the sintering process controlling was constructed, and inference engine of the system was established. Sinter chemical compositions were controlled by the strategies of self-adaptive prediction, internal optimization and center on basicity. And the state of sintering was stabilized centering on permeability. In order to meet the needs of process change and make the system clear, the system has learning ability and explanation function. The software of the system was developed in Visual C++ programming language. The application of the system shows that the hitting accuracy of sinter compositions and burning through point prediction are more than 85%; the first-grade rate of sinter chemical composition, stability rate of burning through point and stability rate of sintering process are increased by 3%, 9% and 4%, respectively. 展开更多
关键词 sintering process process control artificial intelligence
下载PDF
IMAGE DATABASE FOR PATTERN DESIGN SYSTEM
4
作者 许鹤群 《Journal of China Textile University(English Edition)》 EI CAS 1991年第1期59-64,共6页
This paper discusses a pattern design system in textile industry,the establishment of an imagedatabase which is used to store various kinds of source materials for designers’ reference in order tospeed up design proc... This paper discusses a pattern design system in textile industry,the establishment of an imagedatabase which is used to store various kinds of source materials for designers’ reference in order tospeed up design process.Pattern design image database (PDIDB) runs on the double-machine hardware system com-posed of ALTOS-986 and IBM PC/XT microcomputer.The former (host) manages imagedatabase,and the latter works both as a terminal to operate PDIDB and as an image processingstation to input,output,edit and display image data.PDIDB has two mainparts,the image storage management system and the image attributemanagement system and provides some functions,such as retrieval,deleting and updating. 展开更多
关键词 computer aided design IMAGE processING PATTERN information processING system IMAGE database INFORMIX application
下载PDF
Stochastic Modeling of Database Backup Policy for a Computer System
5
作者 Syouji Nakamura Xufeng Zhao Toshio Nakagawa 《Journal of Software Engineering and Applications》 2013年第2期53-58,共6页
As the computer system has developed much in this highly information-oriented society, database security has become a very important problem and its backup strategies need to be made more efficiently and safety. The i... As the computer system has developed much in this highly information-oriented society, database security has become a very important problem and its backup strategies need to be made more efficiently and safety. The image copy method has been used as the most simple and dependable recovery mechanism for media failure. However, this method spends high overhead costs for massive data transmission and much processing time in the normal operation of the database. To cover such weak points, incremental and full backup methods are adopted before updated trucks reach a predetermined level. Moreover, when the number of full backup files exceeded a predetermined level, we stop incremental and full backups and switch it to the image copy. This paper applies cumulative damage model to backup of files in a database system, by putting damage shock by update, failure shock by database failure and damage by dumped files, and considers the tradeoff among overhead costs of image copy and incremental, full backup methods, and discusses analytically an optimal policy for the image copy backup interval. Finally, numerical examples are given in the case of Poisson process and exponential distributions. 展开更多
关键词 database Management system Image COPY Full BACKUP INCREMENTAL BACKUP CUMULATIVE process
下载PDF
Quantitative Security Evaluation for Software System from Vulnerability Database
6
作者 Hiroyuki Okamura Masataka Tokuzane Tadashi Dohi 《Journal of Software Engineering and Applications》 2013年第4期15-23,共9页
This paper proposes a quantitative security evaluation for software system from the vulnerability data consisting of discovery date, solution date and exploit publish date based on a stochastic model. More precisely, ... This paper proposes a quantitative security evaluation for software system from the vulnerability data consisting of discovery date, solution date and exploit publish date based on a stochastic model. More precisely, our model considers a vulnerability life-cycle model and represents the vulnerability discovery process as a non-homogeneous Poisson process. In a numerical example, we show the quantitative measures for contents management system of an open source project. 展开更多
关键词 QUANTITATIVE Security Evaluation VULNERABILITY database NON-HOMOGENEOUS POISSON process CONTENTS Management system
下载PDF
Boosting thermoelectric efficiency of Ag_(2)Se through cold sintering process with Ag nano-precipitate formation
7
作者 Dejwikom Theprattanakorn Thanayut Kaewmaraya Supree Pinitsoontorn 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第12期2760-2769,共10页
Silver selenide(Ag_(2)Se)stands out as a promising thermoelectric(TE)material,particularly for applications near room temper-atures.This research presents a novel approach for the fabrication of bulk Ag_(2)Se samples ... Silver selenide(Ag_(2)Se)stands out as a promising thermoelectric(TE)material,particularly for applications near room temper-atures.This research presents a novel approach for the fabrication of bulk Ag_(2)Se samples at a relatively low temperature(170℃)using the cold sintering process(CSP)with AgNO_(3)solution as a transient liquid agent.The effect of AgNO_(3)addition during CSP on the micro-structure and TE properties was investigated.The results from phase,composition and microstructure analyses showed that the introduc-tion of AgNO_(3)solution induced the formation of Ag nano-precipitates within the Ag_(2)Se matrix.Although the nano-precipitates do not af-fect the phase and crystal structure of orthorhombicβ-Ag_(2)Se,they suppressed crystal growth,leading to reduced crystallite sizes.The samples containing Ag nano-precipitates also exhibited high porosity and low bulk density.Consequently,these effects contributed to sig-nificantly enhanced electrical conductivity and a slight decrease in the Seebeck coefficient when small Ag concentrations were incorpor-ated.This resulted in an improved average power factor from~1540μW·m^(−1)·K^(−2)for pure Ag_(2)Se to~1670μW·m^(−1)·K^(−2)for Ag_(2)Se with additional Ag precipitates.However,excessive Ag addition had a detrimental effect on the power factor.Furthermore,thermal conductiv-ity was effectively suppressed in Ag_(2)Se fabricated using AgNO_(3)-assisted CSP,attributed to enhanced phonon scattering at crystal inter-faces,pores,and Ag nano-precipitates.The highest figure-of-merit(zT)of 0.92 at 300 K was achieved for the Ag_(2)Se with 0.5wt%Ag dur-ing CSP fabrication,equivalent to>20%improvement compared to the controlled Ag_(2)Se without extra Ag solution.Thus,the process outlined in this study presents an effective strategy to tailor the microstructure of bulk Ag_(2)Se and enhance its TE performance at room temperature. 展开更多
关键词 THERMOELECTRIC silver selenide CHALCOGENIDE cold sintering process nano-precipitate
下载PDF
EXPERT SYSTEM FOR CONTROLLING THE STATE OF SINTERING PROCESS
8
作者 Wang Haidong Jiang Bo (Department of Mineral Processing Engineering,Central South University of Technology,Changsha 410083, China) 《Journal of Central South University》 SCIE EI CAS 1999年第1期42-43,共2页
In order to control sintering process,improve permeability and stabilize burn through point, a control scheme which combines thermal state with permeability state is proposed, and an expert system for controlling sint... In order to control sintering process,improve permeability and stabilize burn through point, a control scheme which combines thermal state with permeability state is proposed, and an expert system for controlling sintering process state is developed, the software which includes about 1000 expert rules is successfully applied to off line control of sintering process. 展开更多
关键词 sintering process STATE CONTROL EXPERT system
下载PDF
Research and Application of Expert System Skeleton for Controlling Sintering Process 被引量:2
9
作者 LONG Hong-ming FAN Xiao-hui +1 位作者 JIANG Tao DAI Lin-qing 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2008年第5期6-8,共3页
An expert system skeleton tool of sintering process was constructed using object-oriented method, which can actualize two functions, i. e. , the shell function and the program function. The skeleton tool offered a pla... An expert system skeleton tool of sintering process was constructed using object-oriented method, which can actualize two functions, i. e. , the shell function and the program function. The skeleton tool offered a platform to build a prototype system, to program class code, and to develop the expert system. Four branch expert systems were developed using the skeleton tool including the control of chemical composition, the control of sintering process state, the control of expended energy, and the diagnosis of abnormity. It is found that the performance of all systems is satisfactory in practice. 展开更多
关键词 sintering process expert system skeleton tool knowledge base illation engine
原文传递
Ore-blending optimization model for sintering process based on characteristics of iron ores 被引量:17
10
作者 Sheng-li Wu Dauter Oliveira +1 位作者 Yu-ming Dai Jian Xu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第3期217-224,共8页
An ore-blending optimization model for the sintering process is an intelligent system that includes iron ore characteristics, expert knowledge and material balance. In the present work, 14 indices are proposed to repr... An ore-blending optimization model for the sintering process is an intelligent system that includes iron ore characteristics, expert knowledge and material balance. In the present work, 14 indices are proposed to represent chemical composition, granulating properties and high temperature properties of iron ores. After the relationships between iron ore characteristics and sintering performance are established, the "two-step" method and the simplex method are introduced to build the model by distinguishing the calculation of optimized blending proportion of iron ores from that of other sintering materials in order to improve calculation efficiency. The ore-blending optimization model, programmed by Access and Visual Basic, is applied to practical production in steel mills and the results prove that the present model can take advantage of the available iron ore resource with stable sinter yield and quality performance but at a lower cost. 展开更多
关键词 ore-blending OPTIMIZATION mathematical model sintering process iron ores
下载PDF
Basic characteristics of Australian iron ore concentrate and its effects on sinter properties during the high-limonite sintering process 被引量:7
11
作者 Dong-hui Liu Hao Liu +4 位作者 Jian-liang Zhang Zheng-jian Liu Xun Xue Guang-wei Wang Qing-feng Kang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第9期991-998,共8页
The basic characteristics of Australian iron ore concentrate (Ore-A) and its effects on sinter properties during a high-limonite sintering process were studied using micro-sinter and sinter pot methods. The results sh... The basic characteristics of Australian iron ore concentrate (Ore-A) and its effects on sinter properties during a high-limonite sintering process were studied using micro-sinter and sinter pot methods. The results show that the Ore-A exhibits good granulation properties, strong liquid flow capability, high bonding phase strength and crystal strength, but poor assimilability. With increasing Ore-A ratio, the tumbler index and the reduction index (RI) of the sinter first increase and then decrease, whereas the softening interval (Delta T) and the softening start temperature (T (10%)) of the sinter exhibit the opposite behavior; the reduction degradation index (RDI+3.15) of the sinter increases linearly, but the sinter yield exhibits no obvious effects. With increasing Ore-A ratio, the distribution and crystallization of the minerals are improved, the main bonding phase first changes from silico-ferrite of calcium and aluminum (SFCA) to kirschsteinite, silicate, and SFCA and then transforms to 2CaO center dot SiO2 and SFCA. Given the utilization of Ore-A and the improvement of the sinter properties, the Ore-A ratio in the high-limonite sintering process is suggested to be controlled at approximately 6wt%. 展开更多
关键词 iron ore concentrate LIMONITE basic characteristics sinter properties sintering process
下载PDF
Research on sintering process of YSZ electrolyte 被引量:8
12
作者 HAN Minfang TANG Xiuling PENG Suping 《Rare Metals》 SCIE EI CAS CSCD 2006年第z2期209-212,共4页
Yttria stabilized zirconia (YSZ) has widely been used as electrolyte in solid oxide fuel cell (SOFC). The microstructure of YSZ related to the fabrication process was discussed in the paper. With YSZ nano-powders abou... Yttria stabilized zirconia (YSZ) has widely been used as electrolyte in solid oxide fuel cell (SOFC). The microstructure of YSZ related to the fabrication process was discussed in the paper. With YSZ nano-powders about 40-100 nm as raw material, the YSZ adobe was manufactured by tape calendering process. The named three-step sintering process was performed at 1000 ℃ for 2 h, then raised the temperature with normal rate and as soon as up to 1400 ℃, the furnace was controlled at 1250-1300 ℃ for 10-20 h. The high dense YSZs with the relative density of 96%-99% were obtained; the grain size of YSZ could be reduced to 0.5-3 μm. The above result is benefited to co-fired in the electrode-supported SOFCs. 展开更多
关键词 yttria stabilized zirconia (YSZ) ELECTROLYTE sintering process
下载PDF
Effect of sintering process on microstructure and magnetic properties of high frequency power ferrite 被引量:3
13
作者 SUN Ke LAN Zhongwen +2 位作者 CHEN Shengming SUN Yueming YU Zhong 《Rare Metals》 SCIE EI CAS CSCD 2006年第z1期509-514,共6页
An oxide ceramic process was adopted to prepare high frequency manganese-zinc(MnZn)power ferrite.In combination with the microstructure analysis of material,the influences of sintering process on initial permeability(... An oxide ceramic process was adopted to prepare high frequency manganese-zinc(MnZn)power ferrite.In combination with the microstructure analysis of material,the influences of sintering process on initial permeability(μ_(i))and high frequency loss in unit volume(P_(cv))of MnZn power ferrite were investigated.The results show that in order to obtain fine microstructure and high frequency properties,the preferable sintering temperature and atmosphere are 1230℃and oxygen partial pressure(P_(O_(2)))of 4%,respectively. 展开更多
关键词 manganese-zinc ferrite MICROSTRUCTURE initial permeability sintering process
下载PDF
Preparation of β-Sialon/ZrN bonded corundum composites from zircon by nitridation reaction sintering process 被引量:3
14
作者 马北越 于景坤 +1 位作者 刘涛 颜正国 《Journal of Central South University》 SCIE EI CAS 2009年第5期725-729,共5页
β-Sialon/ZrN bonded corundum composites were synthesized using fused white corundum,alumina micro powder,zircon and carbon black by nitridation reaction sintering process. Phase composition and microstructure of the ... β-Sialon/ZrN bonded corundum composites were synthesized using fused white corundum,alumina micro powder,zircon and carbon black by nitridation reaction sintering process. Phase composition and microstructure of the synthesized composites were investigated by X-ray powder diffraction and scanning electronic microscope,and the formation process of the composites was discussed. The results show that the composites with different compositions can be obtained by controlling the heating temperature and contents of zircon and carbon black. The proper temperature to synthesize the composites is 1773 K. 展开更多
关键词 Β-SIALON ZRN ZIRCON CORUNDUM COMPOSITES nitridation reaction sintering process
下载PDF
Preparation of ZrN(ZrON)-SiAION Composite Ceramics via a Pressureless Sintering Process 被引量:2
15
作者 MA Beiyue LI Ying +1 位作者 LU Zhongxin YU Jingkun 《China's Refractories》 CAS 2014年第4期45-48,共4页
ZrN-SiAlON composite materials were synthesized at 1 550 ℃ for 6 h via a carbothermal reduction nitridation route using fly ash (≤74 μm),zircon (≤ 44 μm) and active carbon as starting materials.The processed ... ZrN-SiAlON composite materials were synthesized at 1 550 ℃ for 6 h via a carbothermal reduction nitridation route using fly ash (≤74 μm),zircon (≤ 44 μm) and active carbon as starting materials.The processed ZrN-SiAlON composite micropowders were mixed with polyvinyl alcohol as binder to prepare ZrN (ZrON)-SiAlON composite ceramics by carbon-embedded pressureless firing at 1 450,1 500 and 1 550 ℃ for 1 h,respectively.Influences of firing temperature on the phase compositions,microstructure and sintering properties of the ceramics were investigated.The results show that:(1) β-SiAlON based composite ceramics with different compositions can be prepared by controlling firing temperature,and the main crystalline phases of the specimen fired at 1 550 ℃ for 1 h involve ZrN,ZrON and β-SiAlON (z =2,Si4Al2O2N6); (2) ZrN (ZrON),β-SiAlON and a Fe-Si based compound can be observed in the microstructures of the specimens fired at different temperatures.ZrN (ZrON) particles distribute homogeneously in the β-SiAlON matrix; (3) raising firing temperature can increase the shrinkage ratio of the ceramics,and the volume shrinkage ratio increases from 19.4% to 40.3% when the firing temperature rises from 1 450 to 1 550 ℃. 展开更多
关键词 ZrN (ZrON)-SiAlON composite ceramics pressureless sintering process fly ash ZIRCON
下载PDF
One-time sintering process to modify xLi2MnO3(1-x)LiMO2 hollow architecture and studying their enhanced electrochemical performances 被引量:3
16
作者 Renheng Wang Yiling Sun +5 位作者 Kaishuai Yang Junchao Zheng Yan Li Zhengfang Qian Zhenjiang He Shengkui Zhong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第11期271-279,共9页
To solve the critical problems of lithium rich cathode materials, e.g., structure instability and short cycle life, we have successfully prepared a ZrO2-coated and Zr-doping xLi2MnO3·(1–x)LiMO2 hollow architectu... To solve the critical problems of lithium rich cathode materials, e.g., structure instability and short cycle life, we have successfully prepared a ZrO2-coated and Zr-doping xLi2MnO3·(1–x)LiMO2 hollow architecture via one-time sintering process. The modified structural materials as lithium-ion cathodes present good structural stability and superior cycle performance in LIBs. The discharge capacity of the ZrO2-coated and Zr-doped hollow pristine is 220 mAh g-1 at the 20th cycle at 0.2 C(discharge capacity loss, 2.7%)and 150 m Ah g-1 at the 100 th cycle at 1 C(discharge capacity loss, 17.7%), respectively. However, hollow pristine electrode only delivers 203 m Ah g-1 at the 20 th cycle at 0.2 C and 124 mAh g-1 at the 100 th cycle at 1 C, respectively, and the corresponding to capacity retention is 92.2% and 72.8%, respectively.Diffusion coefficients of modified hollow pristine electrode are much higher than that of hollow pristine electrode after 100 cycles(approach to 1.4 times). In addition, we simulate the adsorption reaction of HF on the surface of ZrO2-coated layer by the first-principles theory. The calculations prove that the adsorption energy of HF on the surface of ZrO2-coated layer is about-1.699 e V, and the ZrO2-coated layer could protect the hollow spherical xLi2MnO3·(1–x)LiMO2 from erosion by HF. Our results would be applicable for systematic amelioration of high-performance lithium rich material for anode with the respect of practical application. 展开更多
关键词 Lithium rich cathode materials One-time sintering process Coated and doped Electrochemical performances First-principles calculations
下载PDF
Processing Constrained K Closest Pairs Query in Spatial Databases 被引量:1
17
作者 LIU Xiaofeng LIU Yunsheng XIAO Yingyuan 《Wuhan University Journal of Natural Sciences》 EI CAS 2006年第3期543-546,共4页
In this paper, constrained K closest pairs query is introduced, wbich retrieves the K closest pairs satisfying the given spatial constraint from two datasets. For data sets indexed by R trees in spatial databases, thr... In this paper, constrained K closest pairs query is introduced, wbich retrieves the K closest pairs satisfying the given spatial constraint from two datasets. For data sets indexed by R trees in spatial databases, three algorithms are presented for answering this kind of query. Among of them, two-phase Range+Join and Join+Range algorithms adopt the strategy that changes the execution order of range and closest pairs queries, and constrained heap-based algorithm utilizes extended distance functions to prune search space and minimize the pruning distance. Experimental results show that constrained heap-base algorithm has better applicability and performance than two-phase algorithms. 展开更多
关键词 spatial databases query processing R-TREE closest pairs query constrained closest pairs query
下载PDF
Effects of Activated Sintering Process on Properties and Microstructure of W-15Cu Alloy
18
作者 史晓亮 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第6期909-913,共5页
The effects of activated sintering technology of H2 atmosphere sintering on the microstructure and properties of W-15Cu alloy using ultrafine W-15Cu composite powder fabricated by spray drying calcining-continuous red... The effects of activated sintering technology of H2 atmosphere sintering on the microstructure and properties of W-15Cu alloy using ultrafine W-15Cu composite powder fabricated by spray drying calcining-continuous reduction technology were investigated.The experimental results showed that W-15Cu alloy,consolidated by activated sintering technology of H2 atmosphere sintering for 1 h at 1300 ℃,with 98.5 % relative density,transverse rupture strength 1218 MPa,Vickers hardness HV0.5 378,average grain size about 1.2 μm and thermal conductivity 192 W/m·K,was obtained.In comparison to the normal sintering process,activated sintering process to W-15Cu alloy could be achieved at lower sintering temperature.Furthermore,better properties in activated sintered compacts were obtained,and activated sintering process resulted in finer microstructure and excellent properties. 展开更多
关键词 ultrafine composite powder W-15Cu alloy activated sintering process MICROSTRUCTURE PROPERTIES
下载PDF
Research and industrial testing of dioxin emission reduction technology in the sintering process
19
作者 YU Yongmei 《Baosteel Technical Research》 CAS 2021年第3期1-8,共8页
Based on an analysis of the chlorine elements in each component of the sintering mixture,industrial tests of the use of dioxin reduction techniques in the sintering process were found to reduce the chlorine sources an... Based on an analysis of the chlorine elements in each component of the sintering mixture,industrial tests of the use of dioxin reduction techniques in the sintering process were found to reduce the chlorine sources and inhibit the formation of dioxins.The dioxin reduction effect obtained in the industrial experiment was better than that in the sintering pot experiment,but their patterns were consistent.When urea is used as an inhibitor,the dioxins can be significantly reduced.When a 0.02%ratio of urea was added,a maximum dioxin emission reduction of 79%was obtained.Reducing the chlorine sources also had an obvious dioxin reduction effect,enabling a 69.49%reduction.In addition,when these two technologies were applied simultaneously,a significant emission reduction rate of 92.23%was achieved.The concentration of dioxins in flue gas dropped to 0.2421 ng TEQ/m^(3) before desulfurization,which meets the emission standard for dioxins in the final exhaust gas. 展开更多
关键词 DIOXINS flue gas sintering process
下载PDF
Fabrication of superhydrophilic surface on copper substrate by electrochemical deposition and sintering process
20
作者 刘侨鹏 汤勇 +2 位作者 罗文杰 付婷 袁伟 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第7期1200-1205,共6页
Superhydrophilic surfaces were fabricated on copper substrates by an electrochemical deposition and sintering process. Superhydrophobic surfaces were prepared by constructing micro/nano-structure on copper substrates ... Superhydrophilic surfaces were fabricated on copper substrates by an electrochemical deposition and sintering process. Superhydrophobic surfaces were prepared by constructing micro/nano-structure on copper substrates through an electrochemical deposition method. Conversion from superhydrophobic to superhydrophilic was obtained via a suitable sintering process. After reduction sintering, the contact angle of the superhydrophilic surfaces changed from 155° to 0°. The scanning electron microscope (SEM) images show that the morphology of superhydrophobic and superhydrophilic surfaces looks like corals and cells respectively. The chemical composition and crystal structure of these surfaces were examined using energy dispersive spectrometry (EDS) and X-ray diffraction (XRD). The results show that the main components on superhydrophobic surfaces are Cu, Cu2O and CuO, while the superhydrophilic surfaces are composed of Cu merely. The crystal structure is more inerratic and the grain size becomes bigger after the sintering. The interracial strength of the superhydrophilic surfaces was investigated, showing that the interfacial strength between superhydrophilic layer and copper substrate is considerably high. 展开更多
关键词 Superhydrophilic Superhydrophobic Copper surface Electrochemical deposition sintering process
下载PDF
上一页 1 2 181 下一页 到第
使用帮助 返回顶部