Materials Literature
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Nanosize Mg2+, Zn2+, Sr2+, and Na+ mono- and di-substituted calcium hydroxyapatites were synthesized using an aqueous precipitation route under controlled conditions. The chemical composition and the micro-structural features of the polycrystalline samples were characterized by chemical analysis, thermal analysis (TG/…
A significant amount of research has been published in recent years on Polarization - Depolarization Currents (PDC), although little has been published on simulating these processes in the laboratory. Over the past few years an ongoing project related to simple simulation models had been pursued and published. In this…
The influence of heat treatments in air on the surface and thermoelectric properties of polycrystalline silicon clathrate of nominal composition Ba8Al15Si31was investigated. The samples were prepared by combining arc melting and spark plasma sintering methods. Heat treatments were conducted in air at 873 K for 0-480 h…
Células a combustível de óxido sólido é uma tecnologia promissora de geração de energia limpa e utilizam zircônia estabilizada com ítria como eletrólito. Devido à alta temperatura de operação convencional, a busca por novos materiais de eletrólito tem sido feita e apontam a céria como um substituto. Entretanto, pós mi…
Abstract The paper reports the investigation of three umifenovir molecular complexes with dicarboxylic acids, prepared to improve the bioavailability of this drug. All three molecular complexes were investigated by powder X-ray diffraction, infrared spectroscopy, and solid-state nuclear magnetic resonance spectroscopy…
Filtering the wavelengths that do not generate electricity and the wavelengths that generate heat more than photonic current would reduce the photovoltaic (PV) module temperature and accordingly enhances its efficiency. In previous work, a wavelength-based thermoelectrical model for PV modules is proposed and experime…
PCBM is evaluated as a primary contact to CdTe due to its high valence band energy. PCBM films were characterized in terms of morphology, area coverage, thickness, electrical and optical properties, and used as a back contact for CdTe solar cells. PCBM solutions were developed by mixing PCBM with chloroform (CFM) and…
Sulfur dioxide (SO2) including combustion exhaust gas is must be clarified because of its air pollutant in middle-scale facilities or marine ships. In this study, dry DeSOx filter is developed to capture SO2 within diesel exhaust. CaCO3 is focused on as SO2 absorption material. However, SO2 absorption materials has to…
We have considered magnetic and magnetoelastic characteristics of a van Vleck paramagnet LiTmF4 taking into account the interaction between thulium ions via the phonon field. We have calculated parameters of the multipole interaction that is caused by the interaction of Tm3+ ions with dynamic lattice deformations of t…
High-speed tensile tests were carried out to investigate strain rate effect on both yield stress and failure strain using ASTM D1822 Type-S specimens made of polycarbonate. Based on test results, parameters for a material model suitable for polymers are determined, and numerical analysis is carried out to simulate tes…
In this paper a universal heat equation for fully coupled thermal structural finite element analysis of deformable solids capable of predicting ductile-to-brittle failure mode transition at high strain rates is presented. In the problem mathematical formulation appropriate strain measures describing the onset and the…
Materials scientists have been in an age of discovery, as two researchers in IBM Zurich Research Laboratory discovered high-temperature superconductivity in a copper oxide in 1986.1 New materials including superconductors have been synthesized one after another, which have given renewed vigor and enthusiasm to the com…
Corrosion is a major problem all over the world. A lot of researches on corrosion are ongoing all over the world and will continue to go on. This paper investigates the effect of corrosion on the tensile properties of AISI 1040 steel in seawater. The samples were austenised at 8300C, 9300C, and 10300C, while some were…
Natural fiber composites are getting much attention by researchers and industries. Natural fiber composites face the problem of incompatibility between fibers and polymers. Alkali treatment is the most common treatment for natural fiber composites. In this work, short “Kenaf (Hibiscus Cannabinus) Fiber” (KF) reinforce…
The simulation of Cu2ZnSnS4(CZTS) heterojunction solar cell has been studied using the wxAMPS software. An efficiency of 6.752% was obtained from the simulation with the baseline parameters. Front, back and double (front and back grading) interface grading were applied to the absorber layer of the solar cell in order…
The self-assembly behavior of ABC star triblock copolymers can lead to a large number of nanostructures. Indeed, many new and interesting structures have already been discovered and proven to be hotspot in soft matter physics research. In this work, we introduce different phase diagrams of core-shell-cylinder-forming…
Silicon nanoparticles (Si-NPs) were synthesized using thermal plasma assisted gas phase condensation at different compositions of argon and hydrogen. The content of hydrogen in argon was varied from 0 to 15 mole percent. Synthesized nanoparticles were characterized by Transmission Electron Microscopy (TEM) and Fourier…
Harmonics of power system seriously affected the quality of electric power. Active Power Filter (APF) [ which overcomes the shortcomings of passive filter (PF) has become main technology to suppress harmonic. In this paper, development history, key technology, problems and trends of APF are mainly analyzed and reviewe…
An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the substrate was investigated at a fixed current density 10 mA/cm2for 5 mins with different concentration of solution in the range of 0 – 1.0 g/l. The surface morphology, ph…
Photoisomerization of 4-styrylpyridine at different irradiation wavelengths (λ 365 and 254 nm) and in different solvents was studied by UV and 1 H NMR spectroscopy. A procedure for recording the UV spectra of 4-styrylpyridine dissolved in liquid crystalline films freely suspended within a frame. The results of quantum…