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。
By impregnating γ-Al2O3 with cerium/zirconium citrate solutions and subsequent calcination, nanostructured CemZr1−mO2 mixed oxides supported on Al2O3 are obtained, which feature remarkably high oxygen storage even after calcination at 1100 °C for 24 h.
The diffusion coefficient and solubility of water molecules were measured in polyglycolide (PGA), poly(L-lactide) (PLLA), poly[(R)-3-hydroxybutyrate] (PHB), poly(ϵ-caprolactone) (PCL), and SkygreenR (SG). The diffusion coefficient and equilibrium solubility decreased in the order SG > PCL > PLLA > PHB > PGA and PGA >…
We present a Monte Carlo method for the direct evaluation of the difference between the free energies of two crystal structures. The method is built on a lattice-switch transformation that maps a configuration of one structure onto a candidate configuration of the other by "switching" one set of lattice vectors for th…
The successive phase transformations in MgO‐doped BaTiO 3 were studied. Upon MgO doping, dielectric anomalies corresponding to lower phase transformations were broadened and depressed, while an anomaly for a cubic–tetragonal transformation remained and shifted to a lower temperature. XRD peak splitting upon tetragonal…
A precursor was synthesized from a heterogeneous alkoxide solution that contained fine MgO powder, which allowed the preparation of MgAl 2 O 4 spinel powder with high sinterability characteristics. The precursor consisted of a mixture of boehmite (AlO(OH)) and a mixed hydroxide (Mg 4 Al 2 (OH) 14 · 3H 2 O). The spinel…
The problem of identification of partial discharge (PD) phenomena occurring in an insulation system is addressed in this paper. PD distributions coming from different sources, such as internal voids, as well as surface and corona discharges, are compared. In particular, the investigation focuses on the Weibull probabi…
The degradation, modification, and stability of polymeric surfaces exposed to chemically reactive O2 and H2O-vapor plasmas were investigated. Specifically, the effects of these plasmas on etching rate, surface morphology, wetting instability, and fluid-holding capability were studied. Wetting instability is reflected…
Conventional ‘one by one’ synthesis approach has been a major rate limiting step in the systematic exploration of increasingly complex materials for the demanding new technologies. New concepts of ‘combinatorial chemistry’ are presented for the substantially efficient and cost-effective parallel synthesis and optimiza…
This paper describes new findings of an investigation of thermally-activated core–shell reactivities of nanoparticles in solutions for processing size, shape and surface properties. Gold nanoparticles of ≈2 nm core sizes with thiolate monolayer encapsulation were chosen as a model system for the manipulation of reacti…
The heterogeneous interaction of NO2 on decane and hexane soot generated in the laboratory was examined in a Knudsen reactor. Two different types of soot were produced using both fuels: Soot originating from a rich flame at a high fuel/oxygen ratio (‘grey’ soot) and soot generated from a lean flame at a low fuel/oxyge…
The present work provides improved recycled high molecular weight poly(ethylene terephthalate) (PET) by chain extension using 2,2′-(1,4-phenylene)bis(2-oxazoline) (PBO) as the chain extender. PBO is a very reactive compound toward macromolecules containing carboxyl end groups but not hydroxyl end groups. In the case o…
The aromatic steroid equilenin acetate undergoes regioselective and stereoselective hydroxylation and amidation catalyzed by a manganese porphyrin using iodosobenzene (PhIO) and N-tosyliminophenyliodinane (PhINTs) as the oxygen and nitrogen donor, respectively.
Biodegradable composites based on treated and untreated sisal fiber and mater Bi-Z were processed using an internal batch mixer. The effect of processing conditions (temperature, speed of rotation, and time of mixing) and alkaline treatment on the dimensions of sisal fiber was studied. The length and diameter of the i…
The role of solid-state thermal degradation kinetics in steady-flaming combustion is examined. Expressions for the burning surface temperature, pyrolysis zone depth and fractional mass loss rate are derived from heat transport limited, nonisothermal pyrolysis kinetics. The predicted magnitude of these fire response pa…
Five unsymmetrically meso-substituted corroles have been synthesized from dipyrromethanes and aldehydes in yields of up to 19% via a new two-step one-flask procedure.
Recently efficient blue‐white luminescence from Sr 2 CeO 4 was reported. The emission was assigned to a ligand‐to‐metal charge‐ transfer transition of Ce 4 + . Charge transfer (CT) emission from Ce 4 + , or any other tetravalent lanthanide, had not been reported previously. Here, further research on the luminescence o…
Polycrystalline hexagonal ferrites (Y, Z and W-phases) were prepared by the usual ceramic sintering. Their complex permeability spectra were natural resonance type, and numerically separated into spin rotational and domain wall motion components. For the spin rotational component, it was found that the Snoek's product…
A multifunctional epoxy resin has been demonstrated to be an efficient reactive compatibilizer for the incompatible and immiscible blends of polyamide-6 (PA 6) and polybutylene terephthalate (PBT). The torque measurements give indirect evidence that the reaction between PA and PBT with epoxy has an opportunity to prod…
As the Rp of ion implants steadily decreases an ever-increasing percentage of the implant species lies in the oxide layer and is, therefore, not electrically active. For this reason, it is important to have analytical techniques capable of accurately measuring the thickness of ultrathin oxide layers. A round-robin stu…
Excellent enantioselectivity (e.g. 92% ee for 2,2-dimethylchromene) has been achieved in heterogeneous asymmetric epoxidation using a polymer-bound (pyrrolidine salen)-manganese(III) complex; however, this polymeric catalyst underwent partial decomposition under epoxidation conditions.