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材料物理与化学进展(英文)最新文献

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Preparation and Characterization of Aluminium Wire Mat Reinforced Polyester Composite 铝线毡增强聚酯复合材料的制备与表征
材料物理与化学进展(英文) Pub Date : 2019-04-18 DOI: 10.4236/AMPC.2019.94005
Rajib Chandra Das, Md. Ariful Islam, Sanchita Dewanjee, Tanjima Akhter, Farzana Sultana Rafi, Susmita Mondal
{"title":"Preparation and Characterization of Aluminium Wire Mat Reinforced Polyester Composite","authors":"Rajib Chandra Das, Md. Ariful Islam, Sanchita Dewanjee, Tanjima Akhter, Farzana Sultana Rafi, Susmita Mondal","doi":"10.4236/AMPC.2019.94005","DOIUrl":"https://doi.org/10.4236/AMPC.2019.94005","url":null,"abstract":"Aluminum wire mat reinforced polyester composite has been studied as an al-ternative structural material. The physical and mechanical properties of the composite such as tensile strength, flexural strength, water absorption, hardness illustrated the competency of the developed composite. It was found that per-cent water absorption is very low for the resultant studied composite. However, water absorption increased very slowly when metal mat layers were increased. Furthermore, mechanical strength of the composite was increased as mechanical properties: tensile strength, flexural strength, hardness and stiffness of this composite increased with the increase in the number of metal mat layer in the composite. This study suggested the use of this composite as an unbeaten al-ternative structural material to conventional materials.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44549160","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
Synthesis of Electroconducting Hydroxy-Sodalite/Graphite Composite: Preparation and Characterization 导电性羟基方钠石/石墨复合材料的制备与表征
材料物理与化学进展(英文) Pub Date : 2019-03-14 DOI: 10.4236/AMPC.2019.93003
R. Alomari, Muayed Esaifan, M. Hourani, Hiba Al Amayreh, Mohammed Amayreh, H. Khoury
{"title":"Synthesis of Electroconducting Hydroxy-Sodalite/Graphite Composite: Preparation and Characterization","authors":"R. Alomari, Muayed Esaifan, M. Hourani, Hiba Al Amayreh, Mohammed Amayreh, H. Khoury","doi":"10.4236/AMPC.2019.93003","DOIUrl":"https://doi.org/10.4236/AMPC.2019.93003","url":null,"abstract":"Electroconductive hydroxy-sodalite/graphite composites were synthesized by alkali-activation of kaolinite in the presence of sodium hydroxide as the alkali activator and graphite as a conductive filler. Thermal, morphological and microstructural properties in addition to direct current (D.C.) conductivity of the prepared composites were investigated. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy in the attenuated total reflection mode (FTIR/ATR), X-ray diffraction (XRD), scanning electron microscope/energy dispersive using X-ray analysis (SEM/EDX) and DC conductivity measurements were used to characterize the prepared composites. The effect of the hydroxyl-sodalite-to-graphite and NaOH-to-kaolinite ratios on the electrical conductivity was investigated and evaluated on the generated composite specimens made of Jordanian kaolinite or pure kaolinite. It was demonstrated that increasing the mass ratio of graphite-to-kaolinite in the clay-based composites increased the electrical conductivity of the resultant composites. It was also observed that using 1:1 graphite-to-pure kaolinite mass ratio showed the best electrical conductivity value of 3 × 10-3 s/cm, among the other mass ratios used for pure kaolinite specimens, while using 1:1 mass ratio of graphite-to-Jordanian kaolinite showed a conductivity of 1.6 s/cm.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42090602","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
Wide Range RH Detection with Digital Readout: Niche Superiority in Terms of Its Exceptional Performance and Inexpensive Technology 数字读数宽范围RH检测：卓越性能和廉价技术的利基优势
材料物理与化学进展(英文) Pub Date : 2019-03-12 DOI: 10.4236/AMPC.2019.92002
Manju Pandey, K. Sharma, S. S. Islam
{"title":"Wide Range RH Detection with Digital Readout: Niche Superiority in Terms of Its Exceptional Performance and Inexpensive Technology","authors":"Manju Pandey, K. Sharma, S. S. Islam","doi":"10.4236/AMPC.2019.92002","DOIUrl":"https://doi.org/10.4236/AMPC.2019.92002","url":null,"abstract":"In this paper we report alumina based capacitive humidity sensor having exceptional sensing performance in wide range RH segment (10% - 90%). The developed sensor has an improvement of accuracy, reliability, and economic efficiency; apart from fast response and recovery time (~s), negligible baseline drift and high selectivity for moisture. The sensing mechanism was discussed based on their microstructures, such as surface area and mesopore volume. In general, at low humidity, surface area and water adsorption play the dominant role, while at high humidity, mesopore volume and capillary condensation become important. Standard characterization techniques such as AFM, FESEM, BET, XRD and impedance spectroscopy were employed for micro-structural and electrical characterization of RH sensor. The nano porous alumina film undergoes a huge change in dielectric upon adsorption of moisture, ensuing large change in capacitance. Additionally, a prototype RH meter has been developed with digital readout for humidity. The interface circuit was based on capacitor-to-duty cycle (CDC) converter. The proposed digital circuit has the advantage of performing adaptive measurements as a function of resolution and bandwidth. The prototype instrument can be used for sub ppm level moisture detection where stability and response are completely unaffected even in highly toxic ambience viz. 4% ammonia and 4% chlorine.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47696064","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: 4
Enhanced Ferroelectric and Converse Piezoelectric Properties of Dense Lead-Free Na0.4K0.1Bi0.5TiO3 Ceramics for Actuator Applications 用于致动器的致密无铅Na0.4K0.1Bi0.5TiO3陶瓷的增强铁电和反向压电性能
材料物理与化学进展(英文) Pub Date : 2019-03-11 DOI: 10.4236/AMPC.2019.91001
N. Sowmya, P. Varade, N. Venkataramani, A. Kulkarni
{"title":"Enhanced Ferroelectric and Converse Piezoelectric Properties of Dense Lead-Free Na0.4K0.1Bi0.5TiO3 Ceramics for Actuator Applications","authors":"N. Sowmya, P. Varade, N. Venkataramani, A. Kulkarni","doi":"10.4236/AMPC.2019.91001","DOIUrl":"https://doi.org/10.4236/AMPC.2019.91001","url":null,"abstract":"In this work, lead-free Na0.4Bi0.5 TiO3-K0.1Bi0.5TiO3 (NKBT) piezoelectric ceramics were prepared by the solid-state reaction method and their structural, ferroelectric and dielectric properties were systematically studied. NKBT sintered at 1150℃ for 4 h exhibited highly dense (96% - 98% of the theoretical density) and uniform grains of size 1.1 μm. The coexistence of tetragonal (P4bm) and rhombohedral (R3c) phases due to the presence of morphotrophic phase boundary for the chosen composition has been confirmed by the Rietveld refinement studies. Enhanced ferroelectric properties such as remnant polarization (Pr) and coercive field (EC) are found to be 37 μC/cm2 and 30 kV/cm, respectively. The optimized synthesis procedure for NKBT ceramics resulted in enhanced strain (%) and converse piezoelectric coefficient (d33*) of 0.3 % and 554 pm/V which is attributed to smaller grain size and switching of non 180o domains. NKBT ceramics with such excellent piezoelectric properties can be considered as a promising candidate for actuator applications.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47432021","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: 4
Theoretical Study of the Multiferroic Behavior of the Magnetic Relaxor Ferroelectric CdCr 2 S 4 磁弛豫铁电CdCr2S4多铁磁行为的理论研究
材料物理与化学进展(英文) Pub Date : 2018-12-31 DOI: 10.4236/AMPC.2018.812031
A. Apostolov, I. Apostolova, J. Wesselinowa
{"title":"Theoretical Study of the Multiferroic Behavior of the Magnetic Relaxor Ferroelectric CdCr 2 S 4","authors":"A. Apostolov, I. Apostolova, J. Wesselinowa","doi":"10.4236/AMPC.2018.812031","DOIUrl":"https://doi.org/10.4236/AMPC.2018.812031","url":null,"abstract":"Using a microscopic model and the replica method as well as the Green’s function theory, we have investigated the relaxor and multiferroic behavior of CdCr2S4. The magnetization, the remanent polarization Pr and the real part of the dielectric function are studied theoretically as a function of temperature, with and without a magnetic field, respectively. The magnetization and the polarization exist together below the magnetic phase transition temperature. Pr decreases whereas increases and the peak shifts to smaller temperature values with increasing magnetic field h. Moreover, the temperature and electric field E dependence of the magnetization M is also discussed. A kink is observed around the ferroelectric transition temperature. The kink is deeper for stronger electric fields and anharmonic spin-phonon interactions.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"8 1","pages":"459-467"},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49612023","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
Effect of Different Kinetic Factors on the Thermochemistry of Sulfophosphoric Attack Reaction of Natural Phosphate Tunisian by DRC 不同动力学因素对刚果民主共和国对突尼斯天然磷酸盐磺-磷侵蚀反应热化学的影响
材料物理与化学进展(英文) Pub Date : 2018-11-16 DOI: 10.4236/ampc.2018.811029
Olfa Lachkar-Zamouri, K. Brahim, F. Bennour, I. Khattech
{"title":"Effect of Different Kinetic Factors on the Thermochemistry of Sulfophosphoric Attack Reaction of Natural Phosphate Tunisian by DRC","authors":"Olfa Lachkar-Zamouri, K. Brahim, F. Bennour, I. Khattech","doi":"10.4236/ampc.2018.811029","DOIUrl":"https://doi.org/10.4236/ampc.2018.811029","url":null,"abstract":"Mixture of phosphoric and sulfuric acid solutions has been used to investigate the dissolution of natural phosphates (PN) by DRC. The effect of concentration, particle size and stirring speed reaction is examined. Thermochimique properties of each kinetic parameters reaction are determined. It was found that these parameters have a considerable effect on the thermochemical aspect of the attack reaction. It is known that the process of PN sulphophosphoric acid attack leads to the formation of dihydrate (CaSO4.2H2O: DH). The present work shows the precipitation of other residues their formula depends on factors studied. The increase in concentration leads to the formation of hemihydrate (CaSO4v1/2H2O:HH) beside DH for the low values of% H2SO4 due to the solubility of dihydrate on the etching solution and the precipitation of (Ca (H2PO4)2.2H2O) next of DH for low agitation values because of the lack of turbulence between the liquid phase and the solid phase which favors the precipitation of this latter compound.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"08 1","pages":"429-440"},"PeriodicalIF":0.0,"publicationDate":"2018-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43683612","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
Different Interaction Mechanisms of Evaporated Porphyrin Films Exposed to NO 2 二氧化氮作用下蒸发卟啉膜的不同相互作用机理
材料物理与化学进展(英文) Pub Date : 2018-11-16 DOI: 10.4236/AMPC.2018.811030
M. Rivera, J. Rivera, O. Amelines-Sarria, Y. Wang
{"title":"Different Interaction Mechanisms of Evaporated Porphyrin Films Exposed to NO 2","authors":"M. Rivera, J. Rivera, O. Amelines-Sarria, Y. Wang","doi":"10.4236/AMPC.2018.811030","DOIUrl":"https://doi.org/10.4236/AMPC.2018.811030","url":null,"abstract":"In this work, metal free and zinc tetraphenylporphyrin films were employed as nitrogen dioxide (NO2) gas sensors. The films were vacuum evaporated and the sensor response was evaluated as changes in the optical absorption spectra, hydrophobic properties and conductivity at different gas concentrations. From UV-Vis results, important changes in the absorption peaks were observed after gas exposure. The morphology of the films before and after gas interaction was obtained by using scanning electron and atomic force microscopy. The films morphology showed a degradation after gas adsorption for the metal free system but gas entrapment for the zinc porphyrin film. In order to elucidate the gas adsorption phenomena, density functional theory calculations were also performed. Here, it was observed that the porphyrin chemical structure not only affects the gas coordination sites which affect the porphyrin electronic distribution and packing arrangement, but also, determines the gas detection mechanism for sensing applications.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"08 1","pages":"441-457"},"PeriodicalIF":0.0,"publicationDate":"2018-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43738915","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: 6
Attack of Tunisian Phosphate Ore by a Mixture of Sulfuric and Phosphoric Acid: Thermochemical Study by Means of Differential Reaction Calorimetry 硫酸和磷酸混合物对突尼斯磷矿的侵蚀作用——差示反应量热法的热化学研究
材料物理与化学进展(英文) Pub Date : 2018-10-26 DOI: 10.4236/AMPC.2018.810028
Olfa Lachkar-Zamouri, K. Brahim, Feten Bennour-Mrad, I. Khattech
{"title":"Attack of Tunisian Phosphate Ore by a Mixture of Sulfuric and Phosphoric Acid: Thermochemical Study by Means of Differential Reaction Calorimetry","authors":"Olfa Lachkar-Zamouri, K. Brahim, Feten Bennour-Mrad, I. Khattech","doi":"10.4236/AMPC.2018.810028","DOIUrl":"https://doi.org/10.4236/AMPC.2018.810028","url":null,"abstract":"A calorimetric, Differential Reaction Calorimetry (DRC), study of the thermochemical of the attack of a phosphate ore from Gafsa region (Tunisia) by a mixture of sulfuric and phosphoric acid is undertaken at different solid-liquid ratio and different temperature. The plot of the quantity of heat measured by integrating the raw signal as a function of the dissolved mass in the same volume solution at 25℃ presents three straight segments attributed at the formation of the hemihydrate (CaSO4·1/2H2O:HH), the dihydrate (CaSO4·2H2O:DH) or a mixture of these two products checked by X-ray diffraction, infrared spectroscopy and thermal analysis (Differential Scanning Calorimeter: DSC). The attack by the acid mixture was performed at higher temperature and showed in addition the formation of another form of calcium sulfate:anhydrous (CaSO4:AH). Moreover, the variation of mass enthalpy versus temperature presents a break at the T = 45℃. According to our results, it seems that the effect of the temperature on the sulfo-phosphoric attack reaction on the natural phosphate (NP) generates a change of mechanism at around 45℃.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"8 1","pages":"411-427"},"PeriodicalIF":0.0,"publicationDate":"2018-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49667219","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
Magnetic and Electrical Properties of Gd Doped Ni-Cu-Zn-Fe 2 O 4 Gd掺杂Ni-Cu-Zn-Fe2O4的磁电性能
材料物理与化学进展(英文) Pub Date : 2018-10-18 DOI: 10.4236/AMPC.2018.810027
P. S. Rao, T. Anjaneyulu, D. V. K. Reddy, M. Reddy
{"title":"Magnetic and Electrical Properties of Gd Doped Ni-Cu-Zn-Fe 2 O 4","authors":"P. S. Rao, T. Anjaneyulu, D. V. K. Reddy, M. Reddy","doi":"10.4236/AMPC.2018.810027","DOIUrl":"https://doi.org/10.4236/AMPC.2018.810027","url":null,"abstract":"Ni0.5Cu0.25Zn0.25GdxFe2-xO4 (x = 0.0, 0.025, 0.05, 0.075, 0.1) ferrites were synthesized using an oxalic-based precursor method. The TC for all the Ni0.5Cu0.25Zn0.25GdxFe2-xO4 (x = 0.0, 0.025, 0.05, 0.075, 0.1) samples was measured by using one of the double coil susceptibility setup. In all the samples it is observed that, at a certain temperature, susceptibility falls to zero indicating the Curie temperature (TC) and ferrimagnetic samples are converted into paramagnetic sample at that temperature. The electrical properties were investigated for these samples. Dielectric properties and ρdc properties were observed to decrease with the increase in the frequency for all the Gd doped ferrite samples.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"08 1","pages":"401-410"},"PeriodicalIF":0.0,"publicationDate":"2018-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47357177","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: 3
Effect of Polarity on Volume Conductivity of Polymers, Determined by Corona Triode Method 电晕三极管法测定聚合物极性对体积电导率的影响
材料物理与化学进展(英文) Pub Date : 2018-10-12 DOI: 10.4236/AMPC.2018.810026
P. Dhima, F. Vila
{"title":"Effect of Polarity on Volume Conductivity of Polymers, Determined by Corona Triode Method","authors":"P. Dhima, F. Vila","doi":"10.4236/AMPC.2018.810026","DOIUrl":"https://doi.org/10.4236/AMPC.2018.810026","url":null,"abstract":"In this paper, the effect of polarity on the volume conductivity of Kapton and polyethylene (PE), determined using the corona triode method, when the sample current depends linearly on grid potential, was studied. For the determination of volume conductivity, in addition to the analytical method, for the first time, a graphical method is presented as well. According to the experimental results, obtained by both methods, the volume conductivity values of negative corona charged samples were higher than those of the samples charged by positive corona. Considering the different nature of positive and negative coronas, these differences in results are to be expected and are in full accordance with the theoretical considerations as well. On the other hand, the good agreement between the analytical method results and those obtained by the graphical method, indicates high accuracy of the proposed analytical formula. Meanwhile, the satisfying accordance of experimental results with those found by the classical “static” and “dynamic” methods, confirms the accuracy of the corona method, for the determination of volume conductivity of polymers.","PeriodicalId":68199,"journal":{"name":"材料物理与化学进展(英文)","volume":"8 1","pages":"387-400"},"PeriodicalIF":0.0,"publicationDate":"2018-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42432420","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
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