Materials Literature
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Fischer-Tropsch synthesis (FTS) using a Co–Mn/oxidized diamond (O-Dia) catalyst was compared among a fixed bed reactor (FBR), a trickle bed reactor (TBR), and a slurry phase reactor (SPR). For TBR and SPR, hexadecane was employed as a solvent. Regardless of the reactor, the addition of 10 mol% of Mn to Co/O-Dia cataly…
Organic spintronics focuses on utilizing the spin degree of freedom in organic materials because of the long spin relaxation time. The vertical organic spin valve (OSV) is a typical sample structure used to study the spin transport phenomena. However, the fabrication of high quality OSVs is difficult, which results in…
TiO 2 nanopowder, loaded with copper, was prepared under both impregnation and co-precipitation methods.The morphology and structure of TiO 2 were studied by XRD, TEM, FTIR and BET techniques.The photocatalytic activity of samples was studied by monitoring the degradation of nitro phenol, using a UV-visible spectropho…
This paper presents the test results of viscosity changes, versus time and temperature, for the HTPB rubber based pre-binders used in the manufacture of heterogeneous solid rocket propellants (HSRP). A Brookfield HADV-II+PRO viscometer with a small sample adapter (SSA) and SC4-18 spindle, including a TC-550SD water ba…
The addition of many organic substances decreases the thermal stability and increases the explosive properties of ammonium nitrate(V). In order to determine how very material of plant origin would increase the risk of decomposition and explosion of ammonium nitrate(V), tests using the DTA method and the detonation pro…
To solve the problem of structural safety under time-dependent fracture conditions, an algorithm of multi-scale hybrid mechanics from the nano-scale to the macro-scales is described. The paper presents an algorithm that links the physics of materials
Abstract: The relationship between the 15N NMR chemical shifts of aza nitrogen atoms in twelve nitramines and the impact sensitivity of these compounds, expressed as the drop energy, Edr, has been analyzed from the point of view of recently published findings. This relationship appears to be the best method for identi…
Nanocrystalline α-Fe2O3 thin films were deposited by successive ionic layer adsorption and reaction method onto glass substrates. The X-ray diffraction study revealed that α-Fe2O3 films are nanocrystalline in nature with rhombohedral structure. The morphological investigations were carried out by using field emission…
The Pipeline and Hazardous Materials Safety Administration requested a study to examine the chemical and physical properties of bitumen diluted for pipeline transportation and any evidence that diluted bitumen would increase the likelihood of a pipeline failure and release. This article summarizes the resulting Transp…
In order to investigate the characteristics of the thermal reaction for two kinds of mixed explosives, PBXC-10 (HMX/TATB/Binder, 38/57/5) and JO-8 (HMX/Binder, 95/5), multi-point measured temperature cook-off tests were carried out at different heating rates. The thermal transfer and finite chemical reactions that inc…
Effect of shot peening (SP) on bending fatigue limit of high strength steel (SUP9A) containing a semi-elliptical surface slit was investigated. SP was conducted on the specimens containing a semi-elliptical surface slit with aspect ratio, a/c = 0.4, where a was the slit depth (a=0.1, 0.2 and 0.3mm), and c was the half…
In this paper, thirty-nine phases in the Ti-Al-O system at high temperatures have been analyzed through thermodynamic calculations. A Ti-Al-O isothermal stability diagram was obtained from the thermochemical data. The diagrams described the equations for Ti/Al intermetallic compounds at Al2O3/TixAly and Al2O3/TiAl2O5…
Part 1 Properties and processing of natural rubber: Biosynthesis of natural rubber in different rubber-producing species Natural rubber biosynthesis: Perspectives from polymer chemistry Chemical modification of natural rubber for improved performance Understanding network control by vulcanization for sulfur cross-link…
2-layer copper/polyurethane (Cu/PU) laminated sheets were prepared by a new adhesion method, a double-step treatment consisting of applying low dose (≦0.43 MGy) homogeneous low energy electron beam irradiation (HLEBI) prior to hot-press under 5 MPa and 413 K. Although the weak hot-press adhesion of the Cu/PU was obser…
After the first European Symposium which took place in Germany in 2010, the second European Symposium has been organized in France, on the French Riviera, in Giens on May 12–16, 2014. The main aim was to highlight new initiatives and future growth opportunities for Ni and Co base superalloys. Specifically, recent adva…
In an effort to reduce thermal shrinkage and improve electrochemical performance of porous polypropylene(PP) separators for lithium-ion batteries, a new composite separator is developed by introducing ceramic coated layers on both sides of PP separator through a dip-coating process. The coated layers are comprised of…
Supercritical carbon dioxide (sc2) is known as a good solvent for a wide range of bioactive compounds from natural sources. Extraction of bioactive compounds from plant material using sc2 is a favorable technique for producing solvent-free extracts suitable for a wide range of applications in pharmaceutical, biomedica…
We investigated co-precipitation using magnesium (Mg) salt as a cost efficient method of removing B from wastewater. To clarify the mechanism of co-precipitation and the effect of precipitation rate against B sorption mechanism, we conducted co-precipitation experiments changing reaction time at different temperatures…
GaN-based light emitting diodes (LEDs) as the third generation of lighting devices, have been rapidly developed in recent years. Substrate materials, serving as the LED manufacturing basis, have great influences on the production and application of LED. The critical characteristics of substrate affecting the design an…
One new oleanane-type saponin, 3-O-β-D-glucopyranosyl-(1→4)-β-D-xylopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyl ester (1) was isolated from the MeOH extract of whole plant parts of Cephalaria aristata C. Koch along with three known oleanan…