World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering最新文献_第3页

ENHANCEMENT OF OPTICAL EMISSION FROM QUANTUM DOTS BY PHOTONIC CRYSTAL CAVITIES FABRICATED ON SOI SUBSTRATES 在土壤基底上制造光子晶体腔增强量子点的光学发射

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-12-12 DOI: 10.17654/MT017020103

Toshiki Matsutomi, T. Hayashi, Yoshiharu Takamatsu, Kunihiko Tanaka, Goro Imada, K. Yasui

引用次数: 0

An Overview of Technologies and Selective Depressing Agents for Separating Chalcopyrite and Talc 黄铜矿与滑石分离技术及选择性抑制剂综述

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-11-19 DOI: 10.15344/2455-2372/2018/146

Runpeng Liao, Jiushuai Deng, Hao Lai, Jiaozhong Cai, Xi Zhang, S. Wen, Hua Yang, Jian-ying Deng, J. Fang, Xuesong Sun

{"title":"An Overview of Technologies and Selective Depressing Agents for Separating Chalcopyrite and Talc","authors":"Runpeng Liao, Jiushuai Deng, Hao Lai, Jiaozhong Cai, Xi Zhang, S. Wen, Hua Yang, Jian-ying Deng, J. Fang, Xuesong Sun","doi":"10.15344/2455-2372/2018/146","DOIUrl":"https://doi.org/10.15344/2455-2372/2018/146","url":null,"abstract":"Copper-bearing ore containing talc is generally considered as the most refractory type in various chalcopyrite ores, which is predominantly due to the fact that it includes talc and good natural floatability of talc adversely affects the recovery of chalcopyrite. Flotation is the most economical and effective method to separate copper sulfide minerals and talc. For flotation process, there are selective flotation of talc before flotation of copper-bearing minerals, the flotation of copper-bearing minerals with depression of talc, and the bulk flotation of talc and copper-bearing minerals. At present, the researches focus on the depression of talc. The present work reviewed the molecular structure, properties and mechanism of organic and inorganic depressors for talc. The mechanism of action of depressors for talc includes electrostatic interaction, hydrogen bonding and chemical bonding. At the same time, factors such as pH and ionic strength have an important influence on depression effect for talc. The synergism of combined depressors has various novel depression effects on talc surface, which is more efficient than single agent. In the future, separation technology for talc and chalcopyrite develops toward the application of new depressors and the modification of agents. Meanwhile, the development of new depressors for talc needs to consider the properties of associated minerals with talc and copper-bearing minerals. The combined depressors should be developed to maximize the recovery of valuable metals.","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77233698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

THERMAL TRANSPORT IN THE FRUSTRATED TWO-DIMENSIONAL HEISENBERG MODEL IN THE TRIANGULAR LATTICE 三角形晶格中受挫二维海森堡模型的热输运

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-08-21 DOI: 10.17654/MT017020093

L. Lima, E. B. Cantuária

引用次数: 0

VARIATION OF MATERIAL PROPERTIES OF PIEZOELECTRIC CERAMICS DUE TO IMPACT LOADING 冲击载荷对压电陶瓷材料性能的影响

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-08-01 DOI: 10.17654/MT017020079

M. Mizuno, Yuki Sato

引用次数: 0

Acoustic Emission Feasibility Study for Carbon Epoxy Coated Aluminum Corrosion Monitoring 环氧碳涂层铝腐蚀监测声发射可行性研究

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-06-30 DOI: 10.15344/2455-2372/2018/143

D. Baltzis, O. Evaggelou, A. Lekatou, A. Paipetis

{"title":"Acoustic Emission Feasibility Study for Carbon Epoxy Coated Aluminum Corrosion Monitoring","authors":"D. Baltzis, O. Evaggelou, A. Lekatou, A. Paipetis","doi":"10.15344/2455-2372/2018/143","DOIUrl":"https://doi.org/10.15344/2455-2372/2018/143","url":null,"abstract":"In the presented research effort, cyclic polarization tests were conducted coupled with acoustic emission measurements, in order to monitor the corrosion phenomena. Previous studies have shown that epoxy composite coatings offer satisfactory corrosion protection to aluminum substrates minimizing and even eliminating some degradation phenomena. In the present effort, acoustic emission was applied during potentiodynamic cyclic polarization testing on as received, anodized and carbon epoxy coated aluminum substrates in order to correlate corrosion phenomena, like oxide layer development and localized corrosion, with characteristic acoustic emission signal descriptors. The epoxy coating was used both as received and as reinforced with various carbon fillers i.e. carbon nano-tubes, amorphous graphite or a combination of them. Acoustic emission detected signals due to hydrogen bubble related processes during cathodic polarization and signals due to deposition of thick soluble films during the final stage of anodic polarization. The acoustic profile between coated and uncoated aluminum substrates, exhibited substantial changes dependent both on the surface preparation and the employed reinforcing filler. The overall outcome of the experimental results, indicate that with further research, acoustic emission can be employed as an Aluminum Corrosion Monitoring tool. Acoustic Emission Feasibility Study for Carbon Epoxy Coated Aluminum Corrosion Monitoring Publication History: Received: June 01, 2018 Accepted: June 28, 2018 Published: June 30, 2018","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84225891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Thermoelectric Cooling: The Maximum Temperature Difference and The Relation of Thermoelectric Properties with Geometric Parameters 热电冷却:最大温差及热电性质与几何参数的关系

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-06-30 DOI: 10.15344/2455-2372/2018/142

A. Almeida, M. Robles, David Brownz

引用次数: 0

Bio-oxidation of Arsenopyritic and Pyritic Containing Gold Ore from Tianli Gold Mine and Process 天利金矿含砷黄铁矿的生物氧化及工艺研究

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2018-06-30 DOI: 10.15344/2455-2372/2018/144

A. Auwalu, Hong-ying Yang

{"title":"Bio-oxidation of Arsenopyritic and Pyritic Containing Gold Ore from Tianli Gold Mine and Process","authors":"A. Auwalu, Hong-ying Yang","doi":"10.15344/2455-2372/2018/144","DOIUrl":"https://doi.org/10.15344/2455-2372/2018/144","url":null,"abstract":"Being the most common sulfide minerals, Arsenopyrite and pyrite under oxidizing conditions breaks down to release acids of As and S into the environment, leading to acid mine drainage with high concentrations of dissolved As. In this research, the dissolution of gold ore (with FeS2 and FeAsS as the main sulfides) from Tianli gold mine, Liaoning province, China was investigated. The experiments were conducted in 500mL conical flasks containing 200mL of three different media, 3% pulp density and 1.6 initial pH. The results indicated that treatment with mix culture medium resulted in the dissolution of 99% of Arsenic and 99% of iron, which was higher as compared with when treated in the same culture medium after centrifugation for 20 minutes which in turn higher in comparison with when treated in acidic and pure sterile system. The oxidation potential, Eh of the mix culture medium reached 680mV (vs.SCE) within the first three days of the experiment where as that of centrifuged, acidic and sterile media reached 580, 450 and 445mV (vs.SCE) respectively. The pH tends to increase within the first three days which eventually decreased to nearly one toward ending, courtesy of pyrite which is believed to be net acid releasing sulfide. The dissolution is suggested to be a combined effect of enzymes, ferric iron ions and organic acids. It was observed that enzymes and ferric ions played an essential role in the dissolution process.","PeriodicalId":23734,"journal":{"name":"World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81626045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reversible and Irreversible Wrinkling in Tube Hydroforming Process 管件液压成形过程中的可逆和不可逆起皱

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2017-07-10 DOI: 10.1063/1.4989939

A. A. El-Aty, Tauseef Ahmed, Ahmad Farooq

引用次数: 0

Photoluminescence and Energy Transfer Studies of Dy3+ Ions Doped Lithium Lead Alumino Borate Glasses for W-LED and Laser Applications 掺杂锂铅铝硼酸盐玻璃在W-LED和激光应用中的光致发光和能量转移研究

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2017-06-15 DOI: 10.1016/J.JLUMIN.2017.07.052

Nisha Deopa, A. S. Rao

引用次数: 87

Investigation of Optical, Film Formation and Magnetic Properties of PS Lates/MNPs Composites PS - Lates/MNPs复合材料的光学、成膜及磁性研究

World Academy of Science, Engineering and Technology, International Journal of Materials and Metallurgical Engineering Pub Date : 2017-05-18 DOI: 10.1002/PC.24787

S. Ugur

引用次数: 1