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。
Abstract Every year, millions dollars of money have been spent to remove and inhibit scale deposition in upstream oil industry. Hence it is important to have reliable predictive software to gauge the risk of scaling tendency of a production facility. Several approaches are established to model the scaling tendency dur…
This work presents an experimental study on the interplay between structure and dynamics during isothermal cold crystallization of a copolymer based on poly(ethylene terephthalate) and poly(ethylene isophthalate) of poly(trimethylene terephthalate). Simultaneous X-ray scattering and dielectric spectroscopy measurement…
The dispersion properties of electroacoustic wave modes confined by a superlattice of uniformly moving 180° domain walls in a tetragonal ferroelectric crystal are considered. It is shown that the manifold of partial electroacoustic interfacial waves in the lattice is restricted to the first allowed band, the configura…
Penetration and reflection of millimeter waveband electromagnetic waves have been studied for thin film metal-dielectric nanocomposite Co X(SiO2)1-X materials, in which cobalt nanoparticles are placed inside of 100nm thickness SiO2 film. Microwave properties of nanocomposite samples with different cobalt content have…
Ti-Ga co-doped ZnO thin films (TGZO) have been successfully prepared on glass substrates by DC magnetron sputtering at room temperature. The X-ray diffraction (XRD) patterns show that all the deposited films are polycrystalline with a hexagonal structure and have a preferred orientation along the c-axis perpendicular…
Activated carbon was fabricated by using phenolic resin as carbon source, tween-80 as organic template, KOH as activator. The samples were analyzed by N2 adsorption, scanning electron microscopy (SEM). Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical performance of th…
Abstract The analysis of research reactor transients depends on the kinetic parameters (i.e. effective neutron generation time Λ∗ and the effective delayed neutron fraction βeff). In this work we will calculate these parameters using the MCNP code. Effects of burn up and of Be reflector and cobalt irradiation device o…
We have developed new microdiffraction system at the SPring-8. This system used a focused beam produced using a phase zone plate combined with a narrow slit, which made a focused beam with a small size and a small angular divergence. Furthermore we can use the two-dimensional x-ray CCD detector, which enable us to mea…
The band structure of GNM is studied using TB method. It is found that some surface states appear in the vicinity of the Fermi levels. The electron might be trapped on these surface states due to very large effective mass. The increase of the effective bandgap of GNM as the increase of the radius of the nanohole, may…
Ab initio calculations with the RHF/6–311G* basis set are used for geometrical optimization of regular pyramidal and defect quasi-tetrahedral clusters in binary As-S glasses. It is shown that quasi-tetrahedral S=AsS3/2 structural units are impossible as main network-building blocks in these glasses.
The high flux and low background of the new backscattering spectrometer at the SNS combine to produce an excellent signal to noise ratio, allowing us to investigate a low lying weak excitation never seen before in the spin ice, Ho 2 Ti 2 O 7 . This non-dispersive excitation has been observed at E = 26.3 μe V below 100…
High-quality SiO2 film formation is important for many applications, such as large-scale integration (LSI) circuit and micro-electro-mechanical system (MEMS) industries. We evaluated the structural and electrical insulation properties of SiO2 films using an organosiloxane-based silica sol–gel precursor derived from a…
Nonlinear optical (NLO) polyimide and a series of polyimide/silica nanohybrids were synthesized from 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), NLO molecule 4-(4’- nitrophenyl-2-yl) phenyl-1,3-diamine, coupling agent and TEOS via sol-gel method. The TEOS content in the hybrids was varied from 0 to 22.5 wt%.…
Multilayer Organic Based Devices (OBDs) were constructed by subsequent casting of organic films (from polymers, soluble in the same organic solvent). The problem with dissolution of the underlying layer was avoided by using electrophoretic deposition technique. Optimized conditions for electrophoretic deposition (EPD)…
To reveal the cutting process of aluminum alloy 7050, the oblique cutting finite element model was established to simulate the cutting process. The key techniques including material constitutive model and temperature finite element model were investigated. The chip of aluminum alloy 7050 formed in the simulation of cu…
Contact mechanics is widely used to explore the mechanical properties of brittle materials while it rules the mechanical performance of industrial pieces. Elastic, plastic and brittle responses can be investigated and are highlighted. The indentation plastic zone can be decomposed into a central highly strained zone a…
In this study, we have investigated the effects of Cr dopant on the sintering and electrical properties of ZnO-Sb2O3 (ZS) ceramics for varistor application. Spinel phases including α- and β-type was formed at ZS system and α-spinel was stabilized by Cr doping in ZS system. Densification of ZS and ZSCr system was retar…
The recent research activities on density-control of ZnO nanowire arrays and growth of nanowire heterostructures will be discussed in this contribution. After a brief discussion of the general growth methods of ZnO nanowires, the encountered difficulties that prevent ZnO nanowires from being used as light-emitters wer…
In the temperature range from −115 to +120°C, mechanical tests of samples of austenitic stainless steels 12Kh18N10T and 08Kh16N11M3—materials for the casings of spent fuel assemblies of a reactor BN-350 irradiated by neutrons to damaging doses of 11–55 dpa—have been carried out. In the range of cryogenic temperatures,…
In order to acquire conductive film with high transparency, conductive polymer PEDT: PSS was mixed with some polar dopants and some surfactants. The coating fluid was acquired and coated on the PET film with different coating rods, and conductive film was gotten after drying at some temperature. The conductive mechani…