材料物理与化学进展(英文)最新文献_第3页

Environmentally Friendly Bifunctional Catalyst for ORR and OER from Coconut Shell Particles 椰壳颗粒ORR和OER的环保型双功能催化剂

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.125008

Maryam Jahan, Foster Feni

引用次数: 4

Image Acquisition and Parameter Calculations for Optimization of the Automatic Identification of Terpenes in a Combined Laser Thin Film Extract 联合激光薄膜萃取物中萜烯自动识别的图像采集与参数计算优化

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.126010

Theodore Guié Toa Bi, W. Vangah, Alico Nango Jérôme, S. Ouattara, A. Clément

引用次数: 0

Tunable Optical Bandgap of Gadolinium Substituted Nickel-Zinc Ferrite Nanoparticles-Effect of Calcination Temperature on Its Optical Parameters 钆取代镍锌铁氧体纳米粒子的可调光学带隙——煅烧温度对其光学参数的影响

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.123003

K. Kumar

引用次数: 6

Equilibrium Composition of a Plasma in the Low Voltage Air Circuit Breaker Contaminated by the Vapor of AgSnO₂ Alloy Electrical Contacts 受AgSnO2合金电触点蒸气污染的低压空气断路器中等离子体的平衡组成

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.125006

Banouga Adjigkiga, Kagoné Abdoul Karim, Y. W. Charles, Kohio Niéssan, Koalaga Zacharie, Zougmoré François

{"title":"Equilibrium Composition of a Plasma in the Low Voltage Air Circuit Breaker Contaminated by the Vapor of AgSnO<sub>2</sub> Alloy Electrical Contacts","authors":"Banouga Adjigkiga, Kagoné Abdoul Karim, Y. W. Charles, Kohio Niéssan, Koalaga Zacharie, Zougmoré François","doi":"10.4236/ampc.2022.125006","DOIUrl":"https://doi.org/10.4236/ampc.2022.125006","url":null,"abstract":"When the circuit breaker cuts the electric current, an electric arc is created between its electrodes. The success or failure of breaking the electric current by the circuit breaker depends strongly on the physico-chemical properties of the electric arc created, such as the composition of which depends on the material of the electrical contacts. In this work, we determine the equilibrium composition of the electric arc in the low voltage air circuit breaker with silver tin dioxide alloy contacts, in a temperature range from 500 K to 15,000 K and at atmospheric pressure. We use the Gibbs free energy minimization method and develop a computer code to determine the equilibrium composition of the created plasma. The analysis of the results obtained shows that O 2 particles with a dissociation energy of 5.114 eV, NO with a dissociation energy of 6.503 eV, and N 2 dissociation 9.756 eV dissociate around 3500 K, 5000 K, and 7500 K, respectively. We note that the electro-neutrality is established between the electrons and the cations: Ag + and NO + , for temperatures lower than 6500 K. For temperatures higher than 6500 K, the electro-neutrality is established between the electrons and the cations: N + , O + , and Ag + . The numerical density of the electrons increases when the proportion of the vapor of the electrical contacts increases in the mixture, in particular for temperatures lower than 11,000 K.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70332192","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

Microwave-Assisted Hydrolysis of Hemicellulose over Sulfonated Catalysts 磺化催化剂上半纤维素的微波辅助水解

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.1211020

Itidel Belkadhi, Mohamed Achraf Bouabdellah, Lassâad Ben Hammouda, Z. Ksibi, F. Medina

引用次数: 0

Development of a Graphite Coating and Its Transfer from Batch to Coil Process for Application in PEMFC for Hydrogen-Powered Vehicles 用于氢动力汽车PEMFC的石墨涂层的研制及其批量转卷工艺

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.124005

Maurizio Giorgio, Maximilian Steinhorst, S. Topalski, T. Roch, C. Leyens

{"title":"Development of a Graphite Coating and Its Transfer from Batch to Coil Process for Application in PEMFC for Hydrogen-Powered Vehicles","authors":"Maurizio Giorgio, Maximilian Steinhorst, S. Topalski, T. Roch, C. Leyens","doi":"10.4236/ampc.2022.124005","DOIUrl":"https://doi.org/10.4236/ampc.2022.124005","url":null,"abstract":"In the present paper, coating systems consisting of a metallic corrosion bar-rier and a conductive graphitic carbon layer were deposited by a DC vacuum arc process. The coatings were developed in a batch process for application in the polymer electrolyte membrane fuel cell (PEMFC), and transferred to a continuous coil process to facilitate industrial mass production. The coating samples in the coil process had to achieve comparable results to the samples produced in the batch process, to meet the requirements of the environment prevailing in the fuel cell. The transfer to roll-to-roll processes is a crucial factor for commercial upscaling of PEMFC production. The experimental results showed that the electrical conductivity and corrosion resistance of the samples in the coil process were significantly improved compared to the un-coated base material and showed comparable performance to batch coated samples. X-ray photoelectron spectroscopy (XPS) was performed to deter-mine the depth profile and the surface composition. Additional measurements were recorded for the contact resistances using the four-wire sensing method as well as corrosion resistance using potentiodynamic methods.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70332137","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

Calibration of DEM Parameters to Simulate a Planetary Ball Mill 行星球磨机仿真的DEM参数标定

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.127011

M. Mhadhbi

引用次数: 2

Study on the Physical and Mechanical Properties of Al-Powder Reinforced Bioactive Glass: Ceramic Composite Material 铝粉增强生物活性玻璃陶瓷复合材料的物理力学性能研究

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.122002

Muhammad Hafizur Rahman Khan, S. Hossain, Mohammad Maksudur Rahman

引用次数: 1

Influence of Prandtl Number on Thin Film Condensation in Forced Convection in an Inclined Wall Covered with a Porous Material 普朗特数对多孔材料斜壁强制对流中薄膜凝结的影响

材料物理与化学进展(英文) Pub Date : 2022-01-01 DOI: 10.4236/ampc.2022.126009

Goumbo Ndiaye, M. Ndiaye, V. Sambou, Pape Tamsir Ndiaye, Madialène Sène, C. Mbow

引用次数: 0

Thermal and Physicochemical Characterization of Fibers from Coffee Hulls as Filler for Linear Low Density Polyethylene (LLDPE) 咖啡壳纤维作为线性低密度聚乙烯(LLDPE)填料的热学和物理化学表征

材料物理与化学进展(英文) Pub Date : 2021-10-19 DOI: 10.4236/ampc.2021.1110015

Ahmat Tom, A. Tame, P. N. D. Djonga, Bakary Tigana Djonse Justin, Eugenie Géraldine Nga Abena

{"title":"Thermal and Physicochemical Characterization of Fibers from Coffee Hulls as Filler for Linear Low Density Polyethylene (LLDPE)","authors":"Ahmat Tom, A. Tame, P. N. D. Djonga, Bakary Tigana Djonse Justin, Eugenie Géraldine Nga Abena","doi":"10.4236/ampc.2021.1110015","DOIUrl":"https://doi.org/10.4236/ampc.2021.1110015","url":null,"abstract":"This work presents the thermal, physical and chemical characterization of Coffee canephora, from littoral region of Cameroon, for their use as reinforcement for polymeric materials. The infrared of coffee hulls shows the presence of a large peak intensity at 3299 cm-1 that can be attributed to O-H stretching group of alcohol (cellulose content in coffee pulp). The intensity 2926 cm-1 can be attributed to C-H stretching group of alkanes or the vibration of methoxy group of lignin. Thermo gravimetric analysis shows that around 440°C, the biomass has been completely consumed; the temperature profiles show a peak at 86°C that could correspond to the loss of water as evaporation at a percentage of 8%; the peak at 321°C is accompanied by a water loss of 64.50%; this temperature is assimilated to the degradation of hemicelluloses; the temperature range from 321°C to 401°C is accompanied by a loss of mass of 22.80%, which would be due to the degradation of cellulose. SEM images of the surface of raw coffee hulls, coffee hulls treated with caustic soda respectively clearly reveal gaps between the fibers. The results showed that the incorporation of coffee hulls fiber in LLDPE matrix might result in composites with suitable property application for various industrial fields; especially those that were mechanical features are crucial, such as the replacement of engineering plastics.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44447752","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