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。
In this paper zeolite Beta was synthesized and characterized by XRD, ATG, ATD, XRF and SEM. Subsequently various modifications were made using a surface passivation process in liquid phase with tetraethylorthosilicate (TEOS), using two loads of TEOS and three passivation cycles, in order to obtain six catalysts. These…
Objective : This study aims to investigate the green synthesis of silver nanoparticles (AgNPs) Melothria maderaspatana (MM), and evaluation of their antibacterial activities for the first time. It is observed that MM leaf extract can reduce silver ions into AgNPs. Methods: The obtained particles were analyzed by UV-vi…
Abstract not provided
Abstract A solid‐state reaction route‐based LiTi2 − xEux(PO4)3 was phosphor synthesized for the first time to evaluate its luminescence performance by excitation, emission and lifetime (τ) measurements. The LiTi2 − xEux(PO4)3 phosphor was excited at λexci. = 397 nm to give an intense orange–red (597 nm) emission attri…
Hamiltonian-based ray-tracing technique with mesh representation is presented for designing large-scale cloaking devices with three-dimensional arbitrary shapes, which have inhomogeneity and anisotropy in their electric permittivity and magnetic permeability. In order to deal with arbitrary shapes, the surfaces of the…
A computer model has been developed for starve fed single-screw extrusion with non-conventional screws. Simulation and experimentation for extrusion of PE-LD/PS blend have been carried out. Non-conventional screw equipped with Maddock shearing element has been applied. Melting of polymer, pressure, temperature profile…
ABSTRACT A method is proposed for fabricating flexible materials embedded with macroporous regions by inducing fractures under point loading. Possible use of these structures in strain sensing is demonstrated. Injecting air at high pressure through a needle‐tip generates 3‐dimensional fractures in homogeneously crossl…
In contrast with conventional thermal evaporation-based semiconducting oxide growth methods, gourd-like SiO x nanotubes (NTs) grown from Si substrates were achieved with incorporated Sn-embedded structures through the precontaminated SnO 2 film surroundings. Interestingly, when Sn aggregations assembled as Sn nanopart…
Abstract The high‐pressure clinopyroxene mineral jadeite (chemical composition NaAlSi2O6) was studied by density‐functional theory with respect to its electronic, vibrational, and thermodynamic properties, correctly reproducing the available experimental data. At a larger‐than‐normal volume, however, a low‐density alu…
The evolution of the spin transition in ${\mathrm{LaCoO}}_{3}$ has been investigated with photoemission electron microscopy (PEEM) as a function of temperature. The investigated temperature range spanned from a predominantly low spin configuration (125 K) to the proposed percolation limit for metallization (413 K). Th…
This paper is devoted to the study of the influence of metal ion isomorphous substitution on the ferroelastic-ferroelectric phase transition and dispersion caused by the motion of domain walls in dimethylammonium metal sulfate hexahydrate DMAAl1−xCrxS ferroelectric crystals (x = 0, 0.065, 0.2). It is shown that such a…
We study the rotor-router walk on the infinite square lattice with the outgoing edges at each lattice site ordered clockwise. In the previous paper (Papoyan et al 2015 J. Phys. A: Math. Theor . 48 285203), we considered the loops created by rotors and labeled the sites where the loops become closed. The sequence of la…
Abstract A series of hitherto unknown mixed-metal phosphates of the monophosphate tungsten bronze structure family [MPTB; (WO3)2m(PO2)4] have been obtained by solution combustion synthesis followed by annealing (ϑ= 850°C) at appropriate oxygen pressures. These new phosphates show substitution of W5+by eitherM3+1/3W6+2…
Polymeric films of cross-linked structure may be formed using epoxy-isocyanate blends composed of Epidian-5 epoxy resin, 4,4'-diphenylmethanediisocyanate (MDI), Z-1 polyamine hardener and Epidian-6 epoxy resin modified by glycols. The effect of the component natures and ratio, process temperature and time on the gel-f…
The synthesis of a novel heterocyclic–telechelic polymer, α,ω-oxetanyl-telechelic poly(3-nitratomethyl-3-methyl oxetane), is described. Infrared spectroscopy (IR), gel permeation chromatography (GPC), and nuclear magnetic resonance (NMR) spectroscopy have been used to confirm the successful synthesis, demonstrating th…
Abstract The uses of the ASTM computer program CHETAH were described. The recently released version 10 is capable of accomplishing five different kinds of calculations related to chemical thermodynamics. The program enables the prediction of chemical reactive hazards, heats of reaction for combustion and other types o…
Syntheses of hybrid flame retardant (HFR) additives were done on a semi-industrial scale. HFRs were obtained by in situ synthesis of melamine cyanurate in the presence of expandable graphite. HFRs have been used to reduce the flammability of selected polymers: polyester, epoxide, polystyrene. Compositions characterize…
Concerted efforts need to be undertaken to overcome limited efficiencies and instability issues in order to ensure a niche for organic photovoltaics (OPVs) in the PV market. Recent improvements on tandem structures aside, in order to achieve further improvements it is sensible to construct test‐case scenarios on bulk…
Objective: The research was aimed to synthesize 1-allyl-3-(2-chlorobenzoyl) thiourea and determine its analgesic activity in mice ( Mus musculus ). Methods: The synthesis was carried out by modified Schotten-Baumann reaction, via nucleophilic substitution reaction of allylthiourea on 2-chlorobenzoyl chloride. The anal…
Abstract The resonant type power supplies of medium frequency designed for magnetron sputtering processes often use pulse density modulation to regulate the average discharge power level. While the output power level changes then number of pulses in a group changes, but the discharge current pulses are the same from p…