Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Streszczenie: W artykule przedstawiono i omowiono problematyke związaną z powszechnym stosowaniem materialow polimerowych, ktore mimo wielu swoich zalet charakteryzują sie szacunkowo niską odpornością na dzialanie ognia. Omowiono mozliwości podwyzszenia odporności na dzialanie ognia poprzez dodatek do tworzywa sztuczn…
Emission characteristics of a heavy-duty diesel engine operating on neat gas-to-liquids GTL (1&2) of different fuel characteristics were investigated and a comparison was made with those of diesel fuel. The effect of GTL on the emissions of a heavy duty diesel engine was carried out. The results showed that the engine…
Iranian Journal of Polymer Science and Technology Vol. 26, No. 1, 25-32 April May 2013 ISSN: 1016-3255 Online ISSN: 2008-0883
Key words: chitosan, mechanical properties, paper, oil palm pulp The application of chitosan as an additive in papermaking to improve the strength and water resistant properties is described. Unbleached sulphate pulp from oil palm stem was treated with chitosan. The chitosan was prepared in the laboratory using the ch…
As the using of reinforced concrete shells structures with opening have many advantages that they permit to cover large area without using intermediate supports. They have light weights and require minimum amounts of material that it is required small thicknesses comparing to their spans. This investigation is carried…
In this research electrochemical studies were performed on stainless steels and compared to Cunifer, Monel and Alloy 59 in 3.5% NaCl solution at (22±2) °C and (50±2) °C at 200 rpm.Those materials have been evaluated using weight loss, Tafel polarization, cyclic polarization and scanning electron microscopy techniques.…
报道了在Eu^2＋-Yb^3＋共掺磷酸盐中,一个紫外光子（320nm）通过下转换发光变成两个近红外光子（约1 000nm）的现象.测试了不同样品的吸收、激发和发射光谱,证明了在本玻璃体系中量子剪裁现象的存在;Eu^2＋离子5d-4f能级发光的衰减曲线证明Eu2＋到Yb3＋之间的合作能量传递;用I-H理论模型拟合衰减曲线说明了能量传递的过程.最后计算出了能量传递的效率,当Yb^3＋浓度为1.0mol%时效率为23.05%,当其增加到2.0mol%时,能量传递效率提高到了53.6%.
Thin and homogeneous epitaxial graphene (EG) layers on a 6H-SiC (000 ) substrate are fabricated and they cover the whole substrate (10 × 10 mm 2 ). The sample surface is capped by another 6H-SiC (000 ) wafer in a graphite enclosure to form a relatively high Si partial pressure between them, which significantly reduces…
Vibrational IR and Raman powder spectra were recorded for copper phthalocyanine (CuPc) and titanyl (IV) phthalocyanine (TiOPc). Density functional theory (DFT) calculations have been used to predict the theoretical spectra and to assist reliable assignments of the experimental frequencies. There is, in general, a good…
A search was made for possible half-metallic (HM) antiferromagnet (AFM) in all the double perovskites structures of Sr2BB'O6 where BB' pairs are any combination of 3d, 4d or 5d transition elements with the exception of La. Sr can also be replaced by Ca or Ba whenever HM-AFM was found and similar calculations were then…
A broadband negative refractive index metamaterial based on a windmill-like structure is proposed, and investigated numerically and experimentally at the microwave frequency range. From the numerical and experimental results, effect media parameters are retrieved, which clearly show that two broad frequency bands exis…
The optical conductivity of a trilayer graphene is studied using the Kubo-Greenwood formula. We calculate the real part of the diagonal optical conductivity of an ABA-stacked trilayer graphene with different Fermi energies. The optical conductivity arises from interband matrix elements of the electric current operator…
The effect of doping carrier transporting materials being used for organic light emitting diodes was investigated in bulk-heterojunction photovoltaic devices composed of poly(3-hexylthiophene) (P3HT) and a perylene bisimide (PBI) derivative. We found that the doping of 4,4’-bis(carbazol-9-yl)biphenyl (CBP) can improve…
Boiler tube failure is a major cause of concern to plant engineers as it leads to many forced outages of the power plants. The cause of failure may be associated with waterside corrosion, fire side corrosion, overheating, stress rupture, erosion or fatigue. H R
Increased vehicle emission is one of the most important issues that have drawn the attention of policy makers and environment alerts these days. The increasing no’s of automobiles playing on roads to day in our country is positioning a serious threat to the ecology, through its harmful pollutants also the fuel economy…
The application of Microbial Fuel Cell (MFC) for electricity generation has been developing recently. In recent years, researchers have shown that MFC can be used to produce electricity from water containing glucose, acetate or lactate. This research explores the application of Single chamber MFC in generating electri…
The aim of the present research work to apply crystal engineering for the selection of API and co-former with primary amide and to investigate the preparation and characterization of co-crystal preparation. Isoniazid (INH, Pyridine-4carboxyhydrazide) is used as a first line anti-tubercular agent, in combination with o…
In this paper, the nanoindentation tests on the two models of neat polyethylene (PE) and the polyethylene incorporated with 25 wt.% POSS (POSS-PE) are performed to reveal the reinforcing mechanism of the mechanical properties. The molecular mechanics method is adopted to eliminate the temperature effects. After the lo…
In order to realize the weight reduction of the carriage of heavy-duty truck, the 700 MPa hot-rolled high-strength C-Mn steel plate was successfully developed on 1750 mm hot-strip mills to replace the Q345 steel plate which was originally used for carriage. The microstructure of the plate was composed of fine-grained…
Two new nanostructures, Plate-shape Nanostructures and Chrysanthemum-shape Nanostructures of SnO 2, have been grown on single silicon substrates by Au-Ag alloying catalyst assisted carbothermal evaporation of SnO 2 and active carbon powders (thermal CVD). The morphology and structure of the prepared nanostructures are…