Materials Literature
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To deposit TiO 2 films through plasma CVD, the partial pressure ratio of O 2 to TiCl 4 should be greater than the stoichiometric ratio ( p O 2 / p TiCl 4 > 1). However, this may lead to the formation of powder instead of film on the substrate when using volume dielectric barrier discharge (volume-DBD) at atmospheric p…
Temperature-misfit strain phase diagrams of BaTiO3/BaZrO3 superlattices were developed and an alteration of the “misfit strain-temperature” phase diagrams against the changing of ferroelectric layers volume fraction was investigated. The topology of developed phase diagrams is similar to that of single BaTiO3 film, bu…
Fast analysis and characterisation of small lignocellulosic particles are known to be problematic when samples contain large number of particles. New methods to quantify the size, shape and structural properties of cellulose microparticles and wood powders are needed. In this paper, we present a measurement scheme bas…
Mechanical properties of wood plastic composites made from wood flour, recycled polystyrene and Nanoclay have been investigated in this study. The wood flour was mixed with the recycled polystyrene at three weight ratios of 40, 50 and 60% for the experiments, while the nanoclay was used in 0, 3 and 5 Phc. Meanwhile, t…
The objective of the current paper was to define a rheological method for the study of the solvent/binder affinity. The adopted strategy involves the study of the intrinsic viscosity [η] of polymer solutions. [η] was estimated via an extrapolation procedure using the Huggins and Kramer equations. The effects of chemic…
Polymer - based nanocomposite materials with carbon nanotubes (CNT) are novel materials which can hold the potential for airplane applications. One of the fabrication methods appropriate also for large scale is melt-mixing using masterbatch with a high content of CNT and fibre extrusion. Using this, nanocomposite fibr…
In the recent past, considerable investigations have been made in natural fibers as a reinforcement in polymer matrix. Manufacturing companies are in constant search of new materials to lower costs and profit margins. Natural fibers are low-cost fibers with high specific properties and low density. Performance charact…
Silver nanoparticles (AgNPs) are increasingly used in various products and consequentially the potential adverse effects associated with exposure to them are of concern. This study investigated the effects of AgNPs on hematologic parameters in male and female mice. Forty mice including twenty male and twenty female, w…
Carbon-free precipitation hardened tool steels of the type Fe-Co-Mo/W have been shown to exhibit as-heat-treated hardness levels similar to those of carbidic high speed steels but markedly higher resistance to heat softening. However, the high content of expensive alloy elements is a marked disadvantage. Here, the eff…
Apparel has an important role in keeping the body comfortable by maintaining the needed equilibrium state between the human body and the environment by getting rid of sweat which is exerted due to the physical activity. This happens through a multitude of mechanisms, one being the capillary action which is also known…
Abstract: Polyurethane plaster cast was an open weave fabric bandage, prepared by coating polyurethane prepolymer on raschel knitted fiberglass and polyester fabric. Curing takes place by coming in contact with water to form hard rigid cast. Polyurethane prepolymers were synthesized by reacting molar excess of dipheny…
SiAlON ceramics have been known for many years as prime candidate materials in structural applications at ambient and high temperatures involving superior mechanical and/or chemical processes. In spite of their excellent properties, the utilization of SiAlONs has remained limited till today due to the high cost of raw…
The front cover represents the morphology and resulting device dynamics in organic solar cell blend films of PTB7 and PC71BM, as revealed by combined resonant X-ray scattering and microscopy. Harald Ade and co-workers find on page 65 that the fullerene molecules (red) are miscible in the polymer (blue) up to 30 wt.%,…
Stability constants of molecular complexes of zinc(II) meso-tetraphenylporphyrin with pyridine and picoline N-oxide were determined from 1 H NMR titration data. Stability constants were matched with data, obtained from calorimetry of titration and spectrophotometric titration. It was found that the constants differ si…
The 0.8Pb(Zr0.48Ti0.52)]O3–0.125Pb(Zn1/3Nb2/3)O3–0.075Pb(Mn1/3Nb2/3)O3 + x wt% Li2CO3 ceramics (PZT-PZN-PMnN), where x = 0 1.0, has been prepared by two-stage calcinations method. The Li2CO3 addition significantly improved the sinterability of the ceramics, resulting in a reduction of sintering temperature from 1150…
Conformal TiO 2 having a smooth surface was deposited using a flow-type reactor for supercritical fluid deposition (SCFD). Ti(O-iPr) 2 (tmhd) 2 was selected as the best candidate for SCFD from among three candidates because it exhibited the best results according to the following criteria: solubility in supercritical…
A new scheme for overcoming losses with incoherent optical gain in a quantum-coherent left-handed atomic vapor is suggested. In order to obtain low-loss, lossless or active left-handed media (LHM), a pump fleld, which aims at realizing population inversion of atomic levels, is introduced into a four-level atomic syste…
International audience
The main content dealt with in this study is analyzing of the bending rig idity of woven fabrics as a function of fabric structure, fabric density (warp and weft spacing) and yarn counts to compare and approve the correspondence results of automatic cyclic bending tester made by Ajeli (A jeli, Jeddi, Rastgo, & Go rga,…
This work is devoted to the experimental study of thermal ageing effect on the large deformation stress–strain behaviour of PE100, tensions tests are conducted on this material samples submitted to a temperature of 90°C during different hold times. It is found that thermal ageing causes an increase of all properties m…