Materials Literature
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Metallic soap prepared by saponification of melon seed oil (Cucumeropsis mannii N) with copper (II) salt was investigated as corrosion inhibitor for mild steel corrosion in 1 M hydrochloric acid solution. Results reveal that the metallic soap inhibited the corrosion process by spontaneous physical adsorption of the ph…
Zinc oxide films and aluminum doped zinc oxide films were prepared by specially designed apparatus for ultrasonic spray pyrolysis. Atomization of precursor solution was produced using an ultrasonic transducer at resonant frequency 1.7 ± 0.085 MHz. The resulting films thickness is less than 400 nm, average roughness is…
Fixation is required to reinforce reconstituted collagen for orthopedic bioprostheses such as tendon or ligament replacements. Previous studies have demonstrated that collagen fibers cross-linked by the biocompatible dicatechol nordihydroguaiaretic acid (NDGA) have mechanical strength comparable to native tendons. Thi…
Red-emitting phosphor KAl 1-x PO 4 F:Eu x 3+ (0.1 ≤ x ≤ 1.0) were fabricated by combustion process at temperature 750 °C. The XRD patterns did not indicate presence of the starting constituents and other likely phases which are an indirect evidence for the formation of the desired compound. The photoluminescence study…
Polycrystalline (K0.4Na0.6Nb0.96Sb0.04)1-x-(Bi0.5K0.5TiO3)x (abbreviated as KNNS–BKT) ceramics have been prepared by the solid-state reaction method. Preliminary X-ray diffraction structural study showed the formation of polycrystalline sample with ABO3 type of perovskite structure and monoclinic symmetry of the ceram…
The effect of surface modification on powder flowability was experimentally investigated in the present study. The powder sample was granulated lactose with 147 μm mass median diameter, which is used as an excipient for direct compression. The surface of the granulated lactose was modified by mechanical dry coating w…
ACTA CHIMICA SINICA Cu * ( 100190) , . Na 2 CO 3 , CuO, Fe 2 O 3 , MnO 2 TiO 2 , Cu . X (XRD)(SEM) . XRD Na 0.44 MnO 2 , pbam. Mn 1.54.1 V 90 mAh/g , , , 1C 74%. XPS Cu . XRD Na 0.66 Cu 0.17 Mn 0.33 Ti 0.5 O 2 1.54.1 V . Cu , . Cu 3 /Cu 2 ; ; ;
A recently held study on molecular dynamic simulation resulted in a breakdown in the Hall–Petch relation of nanocrystalline (NC) body-centered cubic Fe under the deformation behavior. A decrease in the average flow stress of Fe nanocrystalline was found due to the decrease with grain refinement below 13.22 nm. The ref…
Oxidative degradation of polypropylene (PP) is accelerated by not only sunlight but also temperature. Here we propose how the degradation behavior of PP under ultraviolet light irradiation conditions at elevated temperatures, which are more severe than the standards set by the Japanese Industrial Standards (JIS), can…
The results of heat flow simulation in a flash pocket of an extrusion blow mould, made using ANSYS Polyflow software, are presented in this article. The efficiency of plastic cooling speed depending on the flash pocket profile shape was evaluated on the basis of polymer and mould temperature values. The simulation was…
Concrete is a mixture of cement, fine aggregate, coarse aggregate and water with or without additives. Concrete can be made with substitution of cement with materials like Fly Ash, CaCO3 and silica sand that can increase the binding on pasta and also increase the compressive strength of concrete. The Superplasticizer…
Based on a sonochemical route, the effect of trisodium citrate and acetic acid, which served as the structure-directing agents, on the synthesis of Ag3PO4 nano/micro structures was investigated. It is found that the sample prepared at n(AgNO3) = 3 mmol, n(KH2PO4) = 2 mmol, n(Na3Cit) = 1 mmol and n(CH3COOH) = 3 mL is c…
We have studied the optical second harmonic generation (SHG) of a rubbed novel polyimide (PI) film having steroidal structure side chains prepared by spin coating on an indium tin oxide (ITO)-coated glass substrate. The second order nonlinear susceptibility
Pavements are made of different grades of mineral aggregates and organic binder. The aggregates are sorted in different sizes and different amount which are mixed together with bitumen. The finest mineral fraction (d<0.063 mm) is called filler. This component has an important role in asphalt mixture - it fills the gap…
A thermal barrier coating (TBC) system consists of a TBC topcoat (TC), a bond coat (BC), and a substrate. Residual stress acting on a coating is a important parameter for materials mechanics and hence need to be evaluated. We propose a simple method for evaluating the residual stresses acting on each layer of a TBC sy…
ions. At 12.5 K, a magnetic transition is evidenced by ac-susceptibility and specific heat measurements. A spin-trimer model with the leading exchange interaction J ∼ 3.2 K is derived from density-functional band-structure calculations and accounts for all experimental observations.
Currently, enhancing luminescence efficiency of upconversion nanoparticles (UCNPs) has still been a challenging topic in despite of many efforts to improve UC luminescence. Here monodisperse and ultrasmall core-shell-shell nanoparticles, NaGdF 4 : Yb 3+ Er 3+ @ NaGdF 4 : Yb 3+ @ NaGdF 4 : Nd 3+ with about 14 nm in dia…
ABSTRACT Normally, the properties of natural latex are not stable, for example, viscosity and volatile fatty acids, due to the nonrubber components that affect the quality of the latex. The objective here was to develop and compare the adhesive properties of natural latex by using furfural at different ratios. Concent…
In this work, we define the acoustic characteristics of a biphasic fluid consisting of static helium gas bubbles in liquid Fluorinert FC-43 and study the propagation of ultrasound of finite amplitudes in this medium. Very low sound speed and high sound attenuation are found, in addition to a particularly high acoustic…
WC cemented carbide suffers severe wear in water environments. A novel carbon-based film could be a feasible way to overcome this drawback. In this study, a rare earth Ce-modified (Ti,Ce)/a-C:H carbon-based film is successfully prepared on WC cemented carbide using a DC reactive magnetron sputtering process. The micro…