Materials Literature
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Aerogel materials possess a wide variety of excellent functions, hence a striking number of applications have developed for them. In this paper, we present a historic review of the aerogel materials, showing the main concepts, research methods, important scientific problems, formation mechanism, structure characterist…
1.3 - 1.55 micron optical amplifiers for the long distance up-stream and down-stream networks for a future increase of fiber access networks in telecommunications are attractive. A bismuth-doped silica glass has a potential of the broadband spectrum as lasers and amplifier applications at 1.3 -1.55 micron. The bismuth…
A number of compounds in the [Formula: see text] (x = 0–2) series were prepared through a mixed oxide solid-state sintering route. These compounds crystallized into orthorhombic (Pbnm) structure. The relative permittivity [Formula: see text] and temperature coefficient of resonance frequency [Formula: see text] depend…
Purpose To overcome the problem of inferior through-the-thickness mechanical properties displayed by armor-grade composites based on 2-D reinforcement architectures, armor-grade composites based on 3D fiber-reinforcement architectures have recently been investigated experimentally. Design/methodology/approach The subj…
Silica/cellulose composite aerogels with increased optical transmittance were prepared by incorporation of silica in the matrix, and the obtained aerogels had increased homogeneous microstructure, high porosity and surface area, low density. It indicated that the incorporated silica had an obvious influence on the mic…
Abstract Natural circulation systems find extensive applications in industrial engineering systems. One of the applications is in nuclear reactor where the decay heat is removed by natural circulation of the fluid under off-normal conditions. The upcoming reactor designs make use of natural circulation in order to rem…
In this study, the paraffin wax is used in a moulding process to fabricate two dielectric lenses with the diameter of 24 inches for metamaterial measurement in the S‐band (1–4 GHz) using the free‐space method. The moulding process guarantees the lower cost and ease of implementation compared to the conventional machin…
A first-principles method is employed to study the mechanism of screening depolarizing field in two-dimensional BaTiO3 nanosheets. The geometric structures and ferroelectric properties show that the low-dimensional BaTiO3 with thickness m = 3 is a freestanding ultrathin film. Therefore, the scale of BaTiO3 nanosheets…
In this study, polyvinylidene fluoride (PVDF) hollow fiber membranes (HFMs) were modified by coating with polyvinyl alcohol (PVA) and chitosan. The influences of PVA and chitosan amount on PVDF membrane mechanical and separation performance were investigated. The results showed that the modified PVDF membranes had bet…
We report detailed characterization results of Yb-doped Chirally-Coupled-Core (3C) fibers fabricated with Direct Nanoparticle Deposition (DND) technique. Two types of 3C fibers with core/clad geometries of 34/250μm and 55/400μm and another 25/250μm conventional large-mode-area (LMA) fiber are measured and the results…
This work illustrates the effect of thermal mechanical processing parameters on the microstructure and mechanical properties of the Ti-22Al-25Nb alloy prepared by reactive sintering with element powders, consisting of O, B2 and Ti3Al phases. Tensile and plane strain fracture toughness tests were carried out at room te…
An advanced silver‐doped poly(o‐anisidine) molybdophosphate (POA‐MoP/Ag) nanocomposite was synthesized by chemical sol–gel method. The study on the thermal effect of conductivity was also done on POA‐MoP/Ag after acid treatment. The dc conductivity was found within the range of 8.12 × 10−3 S cm−1 for HCl doped, measur…
Graphene oxide (GO) significantly affects the electrochemical activity of its composite with polyanline titanium dioxide (TiO 2 ). In this work various composites with different GO contents have been successfully synthesized by chemical method to compare not only their material properties but also electrochemical char…
Under the visible light irradiation, layer-contacted graphene-like (GL)-MoS2/C3N4 composites can turn domestic wastewater and industrial sewage into clean water that can be discharged into the environment. GL-MoS2/C3N4 are low cost and highly efficient photocatalytic materials for the degradation of pollutants. This s…
The solution-phase photooxygenation of multiply threaded crown/ammonium pseudorotaxanes containing anthracene spacers is monitored by electrospray ionization Fourier-transform ion-cyclotron-resonance (ESI-FTICR) mass spectrometry. The oxygenated pseudorotaxanes are mass-selected and fragmented by infrared multiphoton…
The combinations of particle aspect ratio and enthalpic-barrier templates that lead to translational and orientational ordering of monolayers of rectangular particles are determined using Monte Carlo simulations and density functional theory. For sufficiently high enthalpic barriers, we find that only specific combina…
The purpose of this study is to develop epoxy composites with improved mechanical, thermal, and electrical properties. Semiconducting glass (SG) binary systems such as As 2 S 3 ‐TlS and As 2 Se 3 ‐TlS were synthesized in various mole ratios (1:1 and 1:3). Electrically conductive DGEBA‐type epoxy‐SG‐filled composites w…
Abstract We report for the first time the growth and the systematic study of the growth mechanism for flower-like MgB 2 structures fabricated on the substrates for solid-state electronics by the hybrid physical-chemical vapor deposition (HPCVD) technique. The MgB 2 flower has a width of 30 μ m and a height of 10 μ m.…
In this work a full angle dependent Ferromagnetic Resonance (FMR) investigation on a system of 20 separated Fe/FexOy nanocubes without dipolar coupling is reported. The angular magnetic field dependence of FMR spectra of 20 single particles and 2 dimers were recorded using a microresonator setup with a sensitivity of…
The process of the mineral wool primary layer formation was investigated experimentally on a model spinning machine with sucrose as a working medium. The fibers were pneumatically transported from the spinner rotor to the accumulation grid with the aid of the blow-away and the suction airflow. The fiber primary layer…